docs(b4): item 3 is no longer unmeasured — link it to the follow-up result

B-4 left role propagation open because oauth2-proxy was not deployed yet. B-7 deployed it and the follow-up measured it: the value does not change with request count, only when a new session is created. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
docs: close the three untested items — all three are now measured
2026-09-04 18:10:43 +09:00 · 2026-09-04 18:10:04 +09:00 · 2026-09-04 18:04:44 +09:00 · 2026-09-04 17:28:01 +09:00 · 2026-09-04 17:12:31 +09:00 · 2026-09-04 17:01:54 +09:00
119 changed files with 6163 additions and 57 deletions
@@ -0,0 +1 @@
+[     882ms] [ERROR] Failed to load resource: the server responded with a status of 401 () @ https://app2.hyeonworks.com/favicon.ico:0
@@ -0,0 +1 @@
+[     178ms] [ERROR] Failed to load resource: the server responded with a status of 401 () @ https://app2.hyeonworks.com/favicon.ico:0
@@ -0,0 +1,2 @@
+[   19340ms] [ERROR] Failed to load resource: the server responded with a status of 403 () @ https://app2.hyeonworks.com/oauth2/callback?state=rKipZCUv8W5a-xgYheJbjBsInoD5Il1AaF1RlM_RB2s%3A%2Fapi%2Fecho&session_state=Mw52KcQijFB9Bq4rN-C4SF5Y&iss=https%3A%2F%2Fauth.hyeonworks.com%2Frealms%2Fkeycloak-patterns&code=f9a4835a-2af3-b886-bd04-10b5347ee8d2.Mw52KcQijFB9Bq4rN-C4SF5Y.80431dbc-af81-4673-9790-ad06d1570b2e:0
+[   20374ms] [ERROR] Failed to load resource: the server responded with a status of 401 () @ https://app2.hyeonworks.com/favicon.ico:0
@@ -0,0 +1 @@
+[     210ms] [ERROR] Failed to load resource: the server responded with a status of 401 () @ https://app2.hyeonworks.com/favicon.ico:0
@@ -0,0 +1 @@
+[     423ms] [ERROR] Failed to load resource: the server responded with a status of 401 () @ https://app2.hyeonworks.com/favicon.ico:0
@@ -0,0 +1,8 @@
+[    1127ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[    2377ms] [WARNING] <meta name="apple-mobile-web-app-capable" content="yes"> is deprecated. Please include <meta name="mobile-web-app-capable" content="yes"> @ https://app2.hyeonworks.com/explore?schemaVersion=1&panes=%7B%22h4a%22%3A%7B%22datasource%22%3A%22PBFA97CFB590B2093%22%2C%22queries%22%3A%5B%7B%22refId%22%3A%22A%22%2C%22expr%22%3A%22vendor_cluster_size%22%2C%22range%22%3Atrue%2C%22instant%22%3Afalse%2C%22editorMode%22%3A%22code%22%2C%22legendFormat%22%3A%22cluster_size+%7B%7Bpod%7D%7D%22%2C%22datasource%22%3A%7B%22type%22%3A%22prometheus%22%2C%22uid%22%3A%22PBFA97CFB590B2093%22%7D%7D%2C%7B%22refId%22%3A%22B%22%2C%22expr%22%3A%22up%7Bjob%3D%5C%22keycloak%5C%22%7D%22%2C%22range%22%3Atrue%2C%22instant%22%3Afalse%2C%22editorMode%22%3A%22code%22%2C%22legendFormat%22%3A%22up+%7B%7Bpod%7D%7D%22%2C%22datasource%22%3A%7B%22type%22%3A%22prometheus%22%2C%22uid%22%3A%22PBFA97CFB590B2093%22%7D%7D%5D%2C%22range%22%3A%7B%22from%22%3A%22now-30m%22%2C%22to%22%3A%22now%22%7D%7D%7D&orgId=1:0
+[    2472ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[    3501ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[    5119ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[    8511ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[   14956ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[   28065ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
@@ -0,0 +1,10 @@
+[    1362ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[    1874ms] [WARNING] <meta name="apple-mobile-web-app-capable" content="yes"> is deprecated. Please include <meta name="mobile-web-app-capable" content="yes"> @ https://app2.hyeonworks.com/explore?schemaVersion=1&orgId=1&panes=%7B%22a%22%3A%7B%22datasource%22%3A%22PBFA97CFB590B2093%22%2C%22queries%22%3A%5B%7B%22refId%22%3A%22A%22%2C%22expr%22%3A%22vendor_cluster_size%22%2C%22range%22%3Atrue%2C%22instant%22%3Afalse%2C%22editorMode%22%3A%22code%22%2C%22legendFormat%22%3A%22cluster_size%20%7B%7Bpod%7D%7D%22%2C%22datasource%22%3A%7B%22type%22%3A%22prometheus%22%2C%22uid%22%3A%22PBFA97CFB590B2093%22%7D%7D%2C%7B%22refId%22%3A%22B%22%2C%22expr%22%3A%22up%7Bjob%3D%5C%22keycloak%5C%22%7D%22%2C%22range%22%3Atrue%2C%22instant%22%3Afalse%2C%22editorMode%22%3A%22code%22%2C%22legendFormat%22%3A%22up%20%7B%7Bpod%7D%7D%22%2C%22datasource%22%3A%7B%22type%22%3A%22prometheus%22%2C%22uid%22%3A%22PBFA97CFB590B2093%22%7D%7D%5D%2C%22range%22%3A%7B%22from%22%3A%221788502680000%22%2C%22to%22%3A%221788503520000%22%7D%7D%7D:0
+[    2907ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[    3998ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[    6253ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[    9426ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[   12495ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[   24486ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[   31338ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[   46196ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
@@ -0,0 +1,198 @@
+[    1319ms] [WARNING] <meta name="apple-mobile-web-app-capable" content="yes"> is deprecated. Please include <meta name="mobile-web-app-capable" content="yes"> @ https://app2.hyeonworks.com/explore?schemaVersion=1&orgId=1&panes=%7B%22a%22%3A%7B%22datasource%22%3A%22PBFA97CFB590B2093%22%2C%22queries%22%3A%5B%7B%22refId%22%3A%22A%22%2C%22expr%22%3A%22vendor_cluster_size%22%2C%22range%22%3Atrue%2C%22instant%22%3Afalse%2C%22editorMode%22%3A%22code%22%2C%22legendFormat%22%3A%22cluster_size%20%7B%7Bpod%7D%7D%22%2C%22datasource%22%3A%7B%22type%22%3A%22prometheus%22%2C%22uid%22%3A%22PBFA97CFB590B2093%22%7D%7D%2C%7B%22refId%22%3A%22B%22%2C%22expr%22%3A%22vendor_statistics_approximate_entries_unique%7Bcache%3D%5C%22sessions%5C%22%7D%22%2C%22range%22%3Atrue%2C%22instant%22%3Afalse%2C%22editorMode%22%3A%22code%22%2C%22legendFormat%22%3A%22sessions%20%5Cuce90%5Cuc2dc%20%7B%7Bpod%7D%7D%22%2C%22datasource%22%3A%7B%22type%22%3A%22prometheus%22%2C%22uid%22%3A%22PBFA97CFB590B2093%22%7D%7D%5D%2C%22range%22%3A%7B%22from%22%3A%221788497040000%22%2C%22to%22%3A%221788499080000%22%7D%7D%7D:0
+[    5941ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[   11107ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[   14234ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[   17005ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[   23049ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[   30565ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[   44135ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[   54992ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[   63653ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[   70658ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[   90768ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  105475ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  114995ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  125443ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  137321ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  147252ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  167227ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  179100ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  187598ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  207362ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  213255ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  230544ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  248833ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  257549ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  262324ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  274443ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  294124ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  310689ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  312049ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  327025ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  339933ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  342391ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  362305ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  370693ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  378685ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  397930ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  414007ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  419130ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  420355ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  428557ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  442088ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  445041ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  446677ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  460087ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  462505ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  463673ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  482762ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  495123ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  513442ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  516414ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  536581ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  543441ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  563624ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  580510ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  588408ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  594209ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  604166ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  605295ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  621987ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  639705ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  653320ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  660911ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  678105ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  693662ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  703089ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  704712ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  719727ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  725514ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  730429ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  735135ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  736677ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  751626ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  767197ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  782052ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  797775ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  803343ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  822168ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  828683ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  845938ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  865903ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  883116ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  894375ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  898471ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  914886ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  933184ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  953353ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  963902ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  982846ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[  998975ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1000721ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1003229ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1009879ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1016334ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1023805ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1043684ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1049467ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1059107ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1075856ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1076956ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1094159ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1102825ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1116077ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1134809ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1136553ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1141191ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1158221ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1173507ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1190834ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1198506ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1217761ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1231342ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1233528ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1243017ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1253381ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1256056ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1258513ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1271317ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1284530ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1301830ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1307562ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1310330ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1317970ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1328668ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1336338ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1340155ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1346989ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1348836ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1352113ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1367871ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1371158ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1390720ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1405259ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1420920ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1433518ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1450513ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1453685ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1460654ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1470589ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1489330ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1503666ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1521587ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1537970ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1540426ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1548105ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1549441ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1567671ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1585493ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1597054ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1602669ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1607866ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1623290ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1631460ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1640086ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1645979ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1650742ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1652863ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1663908ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1666587ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1668427ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1676825ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1687882ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1691062ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1698532ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1709597ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1725669ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1739294ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1744412ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1753319ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1761792ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1765298ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1784381ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1786396ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1798982ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1807180ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1823569ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1837292ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1838720ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1848387ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1856847ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1866742ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1879249ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1884700ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1900774ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1912256ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1931088ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1937844ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1948191ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1951360ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1957512ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1958836ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1979011ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 1993551ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 2011369ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 2024782ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 2040763ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 2044650ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 400 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
+[ 2061337ms] [ERROR] WebSocket connection to 'wss://app2.hyeonworks.com/api/live/ws' failed: Error during WebSocket handshake: Unexpected response code: 302 @ https://app2.hyeonworks.com/public/build/1518.a3f1f690c084a37f01c7.js:362
@@ -0,0 +1 @@
+[   12202ms] [ERROR] Failed to load resource: the server responded with a status of 401 () @ https://app2.hyeonworks.com/favicon.ico:0
@@ -0,0 +1 @@
+[     451ms] [ERROR] Failed to load resource: the server responded with a status of 401 () @ https://app2.hyeonworks.com/favicon.ico:0
@@ -0,0 +1,16 @@
+- generic [ref=f45e3]:
+  - banner [ref=f45e4]:
+    - generic [ref=f45e5]: keycloak-patterns
+  - main [ref=f45e6]:
+    - heading "Sign in to your account" [level=1] [ref=f45e8]
+    - generic [ref=f45e12]:
+      - generic [ref=f45e13]:
+        - generic [ref=f45e14]: Username or email
+        - textbox "Username or email" [active] [ref=f45e17]
+      - generic [ref=f45e18]:
+        - generic [ref=f45e19]: Password
+        - generic [ref=f45e21]:
+          - textbox "Password" [ref=f45e24]
+          - button "Show password" [ref=f45e26] [cursor=pointer]:
+            - generic [aria-hidden] [ref=f45e27]: 
+      - button "Sign In" [ref=f45e30] [cursor=pointer]
@@ -0,0 +1,7 @@
+- main [ref=f46e2]:
+  - heading "AP3 · Backend-for-Frontend" [level=1] [ref=f46e3]
+  - paragraph [ref=f46e4]: 브라우저에는 OAuth token이 전혀 전달되지 않습니다. HttpOnly session cookie로 BFF만 호출하고, BFF가 서버 보관 access token을 Resource Server 요청에 붙입니다.
+  - button "Keycloak 로그인" [ref=f46e5] [cursor=pointer]
+  - button "token 경계 확인" [ref=f46e6] [cursor=pointer]
+  - button "BFF 경유 API 호출" [ref=f46e7] [cursor=pointer]
+  - button "CSRF token으로 상태 변경" [ref=f46e8] [cursor=pointer]
@@ -0,0 +1 @@
+- generic [active] [ref=f47e1]: "{ \"headers\" : { \"host\" : [ \"app2.hyeonworks.com\" ], \"user-agent\" : [ \"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/152.0.0.0 Safari/537.36\" ], \"accept\" : [ \"text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7\" ], \"accept-encoding\" : [ \"gzip, deflate, br, zstd\" ], \"accept-language\" : [ \"en-US,en;q=0.9\" ], \"cookie\" : [ \"grafana_session=60c3e7ae41ffc00665f4a2c377def399; grafana_session_expiry=1788497124; _oauth2_proxy=djIuWDI5aGRYUm9NbDl3Y205NGVTMDJZakF5T0dFM01HWTJPV000WmpCa1lUazVOalpsWWpNMk9UY3laR1ptTWcuWmpUamNTbGxVSHV1RmJjQ2ZRd2lsUQ==|1788500797|17Hbo3RDtzOldnLZx2xOt3e34lHo_v0yqRNdqdKUx-g=\" ], \"priority\" : [ \"u=0, i\" ], \"sec-ch-ua\" : [ \"\\\"Chromium\\\";v=\\\"152\\\", \\\"Not?A_Brand\\\";v=\\\"24\\\", \\\"Google Chrome\\\";v=\\\"152\\\"\" ], \"sec-ch-ua-mobile\" : [ \"?0\" ], \"sec-ch-ua-platform\" : [ \"\\\"Linux\\\"\" ], \"sec-fetch-dest\" : [ \"document\" ], \"sec-fetch-mode\" : [ \"navigate\" ], \"sec-fetch-site\" : [ \"none\" ], \"sec-fetch-user\" : [ \"?1\" ], \"upgrade-insecure-requests\" : [ \"1\" ], \"x-forwarded-email\" : [ \"labuser@example.com\" ], \"x-forwarded-host\" : [ \"app2.hyeonworks.com\" ], \"x-forwarded-port\" : [ \"443\" ], \"x-forwarded-preferred-username\" : [ \"labuser\" ], \"x-forwarded-proto\" : [ \"https\" ], \"x-forwarded-server\" : [ \"traefik-5d6fcf895-wpfhr\" ], \"x-forwarded-user\" : [ \"27df5ea9-8703-4ec5-badd-d972c583e1ff\" ], \"x-real-ip\" : [ \"100.123.124.30\" ] }, \"remoteAddr\" : \"100.123.124.30\", \"localAddr\" : \"10.42.0.53\", \"scheme\" : \"https\", \"secure\" : true, \"serverName\" : \"app2.hyeonworks.com\", \"serverPort\" : 443, \"requestUrl\" : \"https://app2.hyeonworks.com/api/echo\" }"
@@ -0,0 +1 @@
+- generic [active] [ref=f48e1]: "{\"pattern\":\"AP3-backend-for-frontend\",\"principal\":\"labuser\",\"accessTokenStoredOnServer\":true,\"refreshTokenStoredOnServer\":true,\"browserTokenCount\":0,\"csrfProtectionEnabled\":true}"
@@ -0,0 +1 @@
+- generic [active] [ref=f49e1]: "{ \"headers\" : { \"host\" : [ \"app2.hyeonworks.com\" ], \"user-agent\" : [ \"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/152.0.0.0 Safari/537.36\" ], \"accept\" : [ \"text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7\" ], \"accept-encoding\" : [ \"gzip, deflate, br, zstd\" ], \"accept-language\" : [ \"en-US,en;q=0.9\" ], \"cookie\" : [ \"grafana_session=60c3e7ae41ffc00665f4a2c377def399; grafana_session_expiry=1788497124; _oauth2_proxy=djIuWDI5aGRYUm9NbDl3Y205NGVTMDJZakF5T0dFM01HWTJPV000WmpCa1lUazVOalpsWWpNMk9UY3laR1ptTWcuWmpUamNTbGxVSHV1RmJjQ2ZRd2lsUQ==|1788500797|17Hbo3RDtzOldnLZx2xOt3e34lHo_v0yqRNdqdKUx-g=\" ], \"priority\" : [ \"u=0, i\" ], \"sec-ch-ua\" : [ \"\\\"Chromium\\\";v=\\\"152\\\", \\\"Not?A_Brand\\\";v=\\\"24\\\", \\\"Google Chrome\\\";v=\\\"152\\\"\" ], \"sec-ch-ua-mobile\" : [ \"?0\" ], \"sec-ch-ua-platform\" : [ \"\\\"Linux\\\"\" ], \"sec-fetch-dest\" : [ \"document\" ], \"sec-fetch-mode\" : [ \"navigate\" ], \"sec-fetch-site\" : [ \"none\" ], \"sec-fetch-user\" : [ \"?1\" ], \"upgrade-insecure-requests\" : [ \"1\" ], \"x-forwarded-email\" : [ \"labuser@example.com\" ], \"x-forwarded-host\" : [ \"app2.hyeonworks.com\" ], \"x-forwarded-port\" : [ \"443\" ], \"x-forwarded-preferred-username\" : [ \"labuser\" ], \"x-forwarded-proto\" : [ \"https\" ], \"x-forwarded-server\" : [ \"traefik-5d6fcf895-wpfhr\" ], \"x-forwarded-user\" : [ \"27df5ea9-8703-4ec5-badd-d972c583e1ff\" ], \"x-real-ip\" : [ \"100.123.124.30\" ] }, \"remoteAddr\" : \"100.123.124.30\", \"localAddr\" : \"10.42.0.53\", \"scheme\" : \"https\", \"secure\" : true, \"serverName\" : \"app2.hyeonworks.com\", \"serverPort\" : 443, \"requestUrl\" : \"https://app2.hyeonworks.com/api/echo\" }"
@@ -0,0 +1 @@
+- generic [active] [ref=f50e1]: "{\"pattern\":\"AP3-backend-for-frontend\",\"principal\":\"labuser\",\"accessTokenStoredOnServer\":true,\"refreshTokenStoredOnServer\":true,\"browserTokenCount\":0,\"csrfProtectionEnabled\":true}"
@@ -0,0 +1,16 @@
+- generic [ref=f51e3]:
+  - banner [ref=f51e4]:
+    - generic [ref=f51e5]: keycloak-patterns
+  - main [ref=f51e6]:
+    - heading "Sign in to your account" [level=1] [ref=f51e8]
+    - generic [ref=f51e12]:
+      - generic [ref=f51e13]:
+        - generic [ref=f51e14]: Username or email
+        - textbox "Username or email" [active] [ref=f51e17]
+      - generic [ref=f51e18]:
+        - generic [ref=f51e19]: Password
+        - generic [ref=f51e21]:
+          - textbox "Password" [ref=f51e24]
+          - button "Show password" [ref=f51e26] [cursor=pointer]:
+            - generic [aria-hidden] [ref=f51e27]: 
+      - button "Sign In" [ref=f51e30] [cursor=pointer]
@@ -0,0 +1,7 @@
+- main [ref=f52e2]:
+  - heading "AP3 · Backend-for-Frontend" [level=1] [ref=f52e3]
+  - paragraph [ref=f52e4]: 브라우저에는 OAuth token이 전혀 전달되지 않습니다. HttpOnly session cookie로 BFF만 호출하고, BFF가 서버 보관 access token을 Resource Server 요청에 붙입니다.
+  - button "Keycloak 로그인" [ref=f52e5] [cursor=pointer]
+  - button "token 경계 확인" [ref=f52e6] [cursor=pointer]
+  - button "BFF 경유 API 호출" [ref=f52e7] [cursor=pointer]
+  - button "CSRF token으로 상태 변경" [ref=f52e8] [cursor=pointer]
@@ -0,0 +1,16 @@
+- generic [ref=f53e3]:
+  - banner [ref=f53e4]:
+    - generic [ref=f53e5]: keycloak-patterns
+  - main [ref=f53e6]:
+    - heading "Sign in to your account" [level=1] [ref=f53e8]
+    - generic [ref=f53e12]:
+      - generic [ref=f53e13]:
+        - generic [ref=f53e14]: Username or email
+        - textbox "Username or email" [ref=f53e17]
+      - generic [ref=f53e18]:
+        - generic [ref=f53e19]: Password
+        - generic [ref=f53e21]:
+          - textbox "Password" [ref=f53e24]
+          - button "Show password" [ref=f53e26] [cursor=pointer]:
+            - generic [aria-hidden] [ref=f53e27]: 
+      - button "Sign In" [ref=f53e30] [cursor=pointer]
@@ -0,0 +1,16 @@
+- generic [ref=f53e3]:
+  - banner [ref=f53e4]:
+    - generic [ref=f53e5]: keycloak-patterns
+  - main [ref=f53e6]:
+    - heading "Sign in to your account" [level=1] [ref=f53e8]
+    - generic [ref=f53e12]:
+      - generic [ref=f53e13]:
+        - generic [ref=f53e14]: Username or email
+        - textbox "Username or email" [ref=f53e17]: labuser
+      - generic [ref=f53e18]:
+        - generic [ref=f53e19]: Password
+        - generic [ref=f53e21]:
+          - textbox "Password" [active] [ref=f53e24]: labpass
+          - button "Show password" [ref=f53e26] [cursor=pointer]:
+            - generic [aria-hidden] [ref=f53e27]: 
+      - button "Sign In" [ref=f53e30] [cursor=pointer]
@@ -0,0 +1,16 @@
+- generic [ref=f53e3]:
+  - banner [ref=f53e4]:
+    - generic [ref=f53e5]: keycloak-patterns
+  - main [ref=f53e6]:
+    - heading "Sign in to your account" [level=1] [ref=f53e8]
+    - generic [ref=f53e12]:
+      - generic [ref=f53e13]:
+        - generic [ref=f53e14]: Username or email
+        - textbox "Username or email" [ref=f53e17]: labuser
+      - generic [ref=f53e18]:
+        - generic [ref=f53e19]: Password
+        - generic [ref=f53e21]:
+          - textbox "Password" [active] [ref=f53e24]: labpass
+          - button "Show password" [ref=f53e26] [cursor=pointer]:
+            - generic [aria-hidden] [ref=f53e27]: 
+      - button "Sign In" [ref=f53e30] [cursor=pointer]
@@ -0,0 +1,16 @@
+- generic [ref=f53e3]:
+  - banner [ref=f53e4]:
+    - generic [ref=f53e5]: keycloak-patterns
+  - main [ref=f53e6]:
+    - heading "Sign in to your account" [level=1] [ref=f53e8]
+    - generic [ref=f53e12]:
+      - generic [ref=f53e13]:
+        - generic [ref=f53e14]: Username or email
+        - textbox "Username or email" [ref=f53e17]: labuser
+      - generic [ref=f53e18]:
+        - generic [ref=f53e19]: Password
+        - generic [ref=f53e21]:
+          - textbox "Password" [active] [ref=f53e24]: labpass
+          - button "Show password" [ref=f53e26] [cursor=pointer]:
+            - generic [aria-hidden] [ref=f53e27]: 
+      - button "Sign In" [ref=f53e30] [cursor=pointer]
@@ -0,0 +1,16 @@
+- generic [ref=f54e3]:
+  - banner [ref=f54e4]:
+    - generic [ref=f54e5]: keycloak-patterns
+  - main [ref=f54e6]:
+    - heading "Sign in to your account" [level=1] [ref=f54e8]
+    - generic [ref=f54e12]:
+      - generic [ref=f54e13]:
+        - generic [ref=f54e14]: Username or email
+        - textbox "Username or email" [ref=f54e17]
+      - generic [ref=f54e18]:
+        - generic [ref=f54e19]: Password
+        - generic [ref=f54e21]:
+          - textbox "Password" [ref=f54e24]
+          - button "Show password" [ref=f54e26] [cursor=pointer]:
+            - generic [aria-hidden] [ref=f54e27]: 
+      - button "Sign In" [ref=f54e30] [cursor=pointer]
@@ -0,0 +1,16 @@
+- generic [ref=f54e3]:
+  - banner [ref=f54e4]:
+    - generic [ref=f54e5]: keycloak-patterns
+  - main [ref=f54e6]:
+    - heading "Sign in to your account" [level=1] [ref=f54e8]
+    - generic [ref=f54e12]:
+      - generic [ref=f54e13]:
+        - generic [ref=f54e14]: Username or email
+        - textbox "Username or email" [ref=f54e17]: labuser
+      - generic [ref=f54e18]:
+        - generic [ref=f54e19]: Password
+        - generic [ref=f54e21]:
+          - textbox "Password" [active] [ref=f54e24]: labpass
+          - button "Show password" [ref=f54e26] [cursor=pointer]:
+            - generic [aria-hidden] [ref=f54e27]: 
+      - button "Sign In" [ref=f54e30] [cursor=pointer]
@@ -0,0 +1,16 @@
+- generic [ref=f55e3]:
+  - banner [ref=f55e4]:
+    - generic [ref=f55e5]: keycloak-patterns
+  - main [ref=f55e6]:
+    - heading "Sign in to your account" [level=1] [ref=f55e8]
+    - generic [ref=f55e12]:
+      - generic [ref=f55e13]:
+        - generic [ref=f55e14]: Username or email
+        - textbox "Username or email" [ref=f55e17]
+      - generic [ref=f55e18]:
+        - generic [ref=f55e19]: Password
+        - generic [ref=f55e21]:
+          - textbox "Password" [ref=f55e24]
+          - button "Show password" [ref=f55e26] [cursor=pointer]:
+            - generic [aria-hidden] [ref=f55e27]: 
+      - button "Sign In" [ref=f55e30] [cursor=pointer]
@@ -0,0 +1,16 @@
+- generic [ref=f55e3]:
+  - banner [ref=f55e4]:
+    - generic [ref=f55e5]: keycloak-patterns
+  - main [ref=f55e6]:
+    - heading "Sign in to your account" [level=1] [ref=f55e8]
+    - generic [ref=f55e12]:
+      - generic [ref=f55e13]:
+        - generic [ref=f55e14]: Username or email
+        - textbox "Username or email" [ref=f55e17]: labuser
+      - generic [ref=f55e18]:
+        - generic [ref=f55e19]: Password
+        - generic [ref=f55e21]:
+          - textbox "Password" [ref=f55e24]: labpass
+          - button "Show password" [ref=f55e26] [cursor=pointer]:
+            - generic [aria-hidden] [ref=f55e27]: 
+      - button "Sign In" [ref=f55e30] [cursor=pointer]
@@ -0,0 +1,17 @@
+- generic [ref=f56e1]:
+  - generic [ref=f56e3]:
+    - generic [ref=f56e4]: "403"
+    - heading "Forbidden" [level=1] [ref=f56e6]
+    - generic [ref=f56e8]:
+      - paragraph [ref=f56e9]: More Info
+      - generic [ref=f56e10] [cursor=pointer]: 
+    - separator [ref=f56e12]
+    - generic [ref=f56e13]:
+      - button "Go back" [ref=f56e16] [cursor=pointer]
+      - button "Sign in" [ref=f56e19] [cursor=pointer]
+  - contentinfo [ref=f56e20]:
+    - paragraph [ref=f56e22]:
+      - text: Secured with
+      - link "OAuth2 Proxy" [ref=f56e23] [cursor=pointer]:
+        - /url: https://github.com/oauth2-proxy/oauth2-proxy#oauth2_proxy
+      - text: version v7.7.1
@@ -0,0 +1 @@
+- generic [ref=f57e1]: "{ \"headers\" : { \"host\" : [ \"app2.hyeonworks.com\" ], \"user-agent\" : [ \"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/152.0.0.0 Safari/537.36\" ], \"accept\" : [ \"text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7\" ], \"accept-encoding\" : [ \"gzip, deflate, br, zstd\" ], \"accept-language\" : [ \"en-US,en;q=0.9\" ], \"cookie\" : [ \"grafana_session=60c3e7ae41ffc00665f4a2c377def399; grafana_session_expiry=1788497124; _oauth2_proxy=djIuWDI5aGRYUm9NbDl3Y205NGVTMDNZMkZrTUdZM01tRmlZekkwWldFell6a3lOREJpTW1KaE5UZGpOVEJoWWcuZVVmckp5VHRqY1VsXzdiV1hiX3hwdw==|1788503135|yDSo7VdgRSlvoVfj9raHPClKTlQiWDg7FauLfoUayw4=\" ], \"priority\" : [ \"u=0, i\" ], \"sec-ch-ua\" : [ \"\\\"Chromium\\\";v=\\\"152\\\", \\\"Not?A_Brand\\\";v=\\\"24\\\", \\\"Google Chrome\\\";v=\\\"152\\\"\" ], \"sec-ch-ua-mobile\" : [ \"?0\" ], \"sec-ch-ua-platform\" : [ \"\\\"Linux\\\"\" ], \"sec-fetch-dest\" : [ \"document\" ], \"sec-fetch-mode\" : [ \"navigate\" ], \"sec-fetch-site\" : [ \"none\" ], \"sec-fetch-user\" : [ \"?1\" ], \"upgrade-insecure-requests\" : [ \"1\" ], \"x-forwarded-email\" : [ \"labuser@example.com\" ], \"x-forwarded-host\" : [ \"app2.hyeonworks.com\" ], \"x-forwarded-port\" : [ \"443\" ], \"x-forwarded-preferred-username\" : [ \"labuser\" ], \"x-forwarded-proto\" : [ \"https\" ], \"x-forwarded-server\" : [ \"traefik-5d6fcf895-wpfhr\" ], \"x-forwarded-user\" : [ \"27df5ea9-8703-4ec5-badd-d972c583e1ff\" ], \"x-real-ip\" : [ \"100.123.124.30\" ] }, \"remoteAddr\" : \"100.123.124.30\", \"localAddr\" : \"10.42.0.53\", \"scheme\" : \"https\", \"secure\" : true, \"serverName\" : \"app2.hyeonworks.com\", \"serverPort\" : 443, \"requestUrl\" : \"https://app2.hyeonworks.com/api/echo\" }"
@@ -0,0 +1 @@
+- generic [ref=f58e1]: "{ \"headers\" : { \"host\" : [ \"app2.hyeonworks.com\" ], \"user-agent\" : [ \"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/152.0.0.0 Safari/537.36\" ], \"accept\" : [ \"text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7\" ], \"accept-encoding\" : [ \"gzip, deflate, br, zstd\" ], \"accept-language\" : [ \"en-US,en;q=0.9\" ], \"cookie\" : [ \"grafana_session=60c3e7ae41ffc00665f4a2c377def399; grafana_session_expiry=1788497124; _oauth2_proxy=djIuWDI5aGRYUm9NbDl3Y205NGVTMHpabUV5TVdKaVpEa3lOemRrTlRFMU9USTBaV00wWWpGaE16bGhNak0zT1EuN2tTa3dnWUdISDkwMGFSSTVOSUFFUQ==|1788503202|snWKU5IRfRLoD9-bXEodGjEgfHeAw8PQaoHnecpFH90=\" ], \"priority\" : [ \"u=0, i\" ], \"sec-ch-ua\" : [ \"\\\"Chromium\\\";v=\\\"152\\\", \\\"Not?A_Brand\\\";v=\\\"24\\\", \\\"Google Chrome\\\";v=\\\"152\\\"\" ], \"sec-ch-ua-mobile\" : [ \"?0\" ], \"sec-ch-ua-platform\" : [ \"\\\"Linux\\\"\" ], \"sec-fetch-dest\" : [ \"document\" ], \"sec-fetch-mode\" : [ \"navigate\" ], \"sec-fetch-site\" : [ \"none\" ], \"sec-fetch-user\" : [ \"?1\" ], \"upgrade-insecure-requests\" : [ \"1\" ], \"x-forwarded-email\" : [ \"changed-labuser@example.com\" ], \"x-forwarded-host\" : [ \"app2.hyeonworks.com\" ], \"x-forwarded-port\" : [ \"443\" ], \"x-forwarded-preferred-username\" : [ \"labuser\" ], \"x-forwarded-proto\" : [ \"https\" ], \"x-forwarded-server\" : [ \"traefik-5d6fcf895-wpfhr\" ], \"x-forwarded-user\" : [ \"27df5ea9-8703-4ec5-badd-d972c583e1ff\" ], \"x-real-ip\" : [ \"100.123.124.30\" ] }, \"remoteAddr\" : \"100.123.124.30\", \"localAddr\" : \"10.42.1.132\", \"scheme\" : \"https\", \"secure\" : true, \"serverName\" : \"app2.hyeonworks.com\", \"serverPort\" : 443, \"requestUrl\" : \"https://app2.hyeonworks.com/api/echo\" }"
@@ -0,0 +1,175 @@
+- generic [ref=f59e1]:
+  - generic [ref=f59e4]:
+    - link "Skip to main content" [ref=f59e5] [cursor=pointer]:
+      - /url: "#pageContent"
+    - banner [ref=f59e7]:
+      - generic [ref=f59e8]:
+        - link [ref=f59e10] [cursor=pointer]:
+          - /url: /
+          - img "Grafana" [ref=f59e11]
+        - generic [ref=f59e14]:
+          - button "Search or jump to..." [ref=f59e18] [cursor=pointer]
+          - generic [ref=f59e19]: ctrl+k
+        - generic [ref=f59e23]:
+          - button "New" [ref=f59e24] [cursor=pointer]
+          - button "Help" [ref=f59e30] [cursor=pointer]
+          - button "News" [ref=f59e33] [cursor=pointer]
+          - button "Profile" [ref=f59e36] [cursor=pointer]:
+            - img "User avatar" [ref=f59e37]
+      - generic [ref=f59e38]:
+        - button "Open menu" [ref=f59e40] [cursor=pointer]
+        - navigation "Breadcrumbs" [ref=f59e43]:
+          - list [ref=f59e44]:
+            - listitem [ref=f59e45]:
+              - link "Home" [ref=f59e46] [cursor=pointer]:
+                - /url: /
+            - listitem [ref=f59e50]:
+              - link "Explore" [ref=f59e51] [cursor=pointer]:
+                - /url: /explore
+            - listitem [ref=f59e55]:
+              - generic "Prometheus" [ref=f59e56]
+        - generic [ref=f59e57]:
+          - generic [ref=f59e60]:
+            - button "Copy shortened URL" [ref=f59e61] [cursor=pointer]
+            - button "Open copy link options" [ref=f59e64] [cursor=pointer]
+          - button "Toggle top search bar" [ref=f59e68] [cursor=pointer]
+    - main [ref=f59e74]:
+      - generic [ref=f59e76]:
+        - heading "Explore" [level=1] [ref=f59e77]
+        - generic [ref=f59e82]:
+          - navigation "Explore toolbar" [ref=f59e84]:
+            - navigation "Search links" [ref=f59e86]:
+              - generic [ref=f59e87]:
+                - button "Content outline" [expanded] [ref=f59e89] [cursor=pointer]:
+                  - generic [ref=f59e92]: Outline
+                - generic [ref=f59e97] [cursor=pointer]:
+                  - img "Prometheus logo" [ref=f59e99]
+                  - textbox "Select a data source" [ref=f59e100]:
+                    - /placeholder: Prometheus
+            - generic [ref=f59e104]:
+              - button "Split the pane" [ref=f59e106] [cursor=pointer]:
+                - generic [ref=f59e109]: Split
+              - button "Add" [ref=f59e111] [cursor=pointer]
+              - generic [ref=f59e116]:
+                - 'button "Time range selected: Last 30 minutes" [ref=f59e117] [cursor=pointer]'
+                - button "Zoom out time range" [ref=f59e122] [cursor=pointer]
+              - generic [ref=f59e126]:
+                - button "Cancel" [ref=f59e127] [cursor=pointer]
+                - button "Auto refresh turned off. Choose refresh time interval" [ref=f59e129] [cursor=pointer]
+          - generic [ref=f59e133]:
+            - generic [ref=f59e137]:
+              - button "Collapse outline" [expanded] [ref=f59e139] [cursor=pointer]:
+                - img "arrow-from-right" [ref=f59e140]
+              - generic [ref=f59e142]:
+                - button "Content outline item collapse button" [ref=f59e143] [cursor=pointer]:
+                  - img "angle-right" [ref=f59e144]
+                - button "Queries" [ref=f59e146] [cursor=pointer]:
+                  - img "arrow" [ref=f59e147]
+            - generic [ref=f59e154]:
+              - generic [ref=f59e156]:
+                - generic [ref=f59e157]:
+                  - generic "Query editor row" [ref=f59e159]:
+                    - generic [ref=f59e160]:
+                      - generic [ref=f59e162]:
+                        - generic [ref=f59e163]:
+                          - button "Collapse query row" [expanded] [ref=f59e164] [cursor=pointer]
+                          - generic [ref=f59e167]:
+                            - button "Query editor row title A" [ref=f59e168] [cursor=pointer]:
+                              - generic [ref=f59e169]: A
+                            - emphasis [ref=f59e170]: (Prometheus)
+                        - generic [ref=f59e171]:
+                          - button "Show data source help" [ref=f59e173] [cursor=pointer]
+                          - button "Duplicate query" [ref=f59e177] [cursor=pointer]
+                          - button "Hide response" [ref=f59e181] [cursor=pointer]
+                          - button "Remove query" [ref=f59e185] [cursor=pointer]
+                          - button "Drag and drop to reorder" [ref=f59e188]:
+                            - img "Drag and drop to reorder" [ref=f59e189]
+                      - generic [ref=f59e192]:
+                        - generic [ref=f59e193]:
+                          - button "Kick start your query" [ref=f59e194] [cursor=pointer]
+                          - generic [ref=f59e197]:
+                            - generic [ref=f59e198] [cursor=pointer]: Explain
+                            - generic [ref=f59e199]:
+                              - checkbox "Explain Toggle switch" [ref=f59e200]
+                              - generic "Toggle switch" [ref=f59e201] [cursor=pointer]
+                          - radiogroup [ref=f59e206]:
+                            - generic [ref=f59e207]:
+                              - radio "Builder" [ref=f59e208] [cursor=pointer]
+                              - generic [ref=f59e209] [cursor=pointer]: Builder
+                            - generic [ref=f59e210]:
+                              - radio "Code" [checked] [ref=f59e211] [cursor=pointer]
+                              - generic [ref=f59e212] [cursor=pointer]: Code
+                        - generic [ref=f59e214]:
+                          - generic [ref=f59e216]:
+                            - button "Loading metrics..." [disabled] [ref=f59e217] [cursor=pointer]
+                            - code [ref=f59e224]:
+                              - generic [ref=f59e225]:
+                                - generic [ref=f59e230]: vendor_cluster_size
+                                - textbox "Editor content;Press Alt+F1 for Accessibility Options." [ref=f59e235]: vendor_cluster_size
+                          - 'button "Options Legend: cluster_size {{pod}} Format: Time series Step: auto Type: Range Exemplars: false" [ref=f59e241] [cursor=pointer]':
+                            - generic [ref=f59e245]:
+                              - heading "Options" [level=6] [ref=f59e246]
+                              - generic [ref=f59e247]:
+                                - generic [ref=f59e248]: "Legend: cluster_size {{pod}}"
+                                - generic [ref=f59e249]: "Format: Time series"
+                                - generic [ref=f59e250]: "Step: auto"
+                                - generic [ref=f59e251]: "Type: Range"
+                                - generic [ref=f59e252]: "Exemplars: false"
+                  - generic "Query editor row" [ref=f59e254]:
+                    - generic [ref=f59e255]:
+                      - generic [ref=f59e257]:
+                        - generic [ref=f59e258]:
+                          - button "Collapse query row" [expanded] [ref=f59e259] [cursor=pointer]
+                          - generic [ref=f59e262]:
+                            - button "Query editor row title B" [ref=f59e263] [cursor=pointer]:
+                              - generic [ref=f59e264]: B
+                            - emphasis [ref=f59e265]: (Prometheus)
+                        - generic [ref=f59e266]:
+                          - button "Show data source help" [ref=f59e268] [cursor=pointer]
+                          - button "Duplicate query" [ref=f59e272] [cursor=pointer]
+                          - button "Hide response" [ref=f59e276] [cursor=pointer]
+                          - button "Remove query" [ref=f59e280] [cursor=pointer]
+                          - button "Drag and drop to reorder" [ref=f59e283]:
+                            - img "Drag and drop to reorder" [ref=f59e284]
+                      - generic [ref=f59e287]:
+                        - generic [ref=f59e288]:
+                          - button "Kick start your query" [ref=f59e289] [cursor=pointer]
+                          - generic [ref=f59e292]:
+                            - generic [ref=f59e293] [cursor=pointer]: Explain
+                            - generic [ref=f59e294]:
+                              - checkbox "Explain Toggle switch" [ref=f59e295]
+                              - generic "Toggle switch" [ref=f59e296] [cursor=pointer]
+                          - radiogroup [ref=f59e301]:
+                            - generic [ref=f59e302]:
+                              - radio "Builder" [ref=f59e303] [cursor=pointer]
+                              - generic [ref=f59e304] [cursor=pointer]: Builder
+                            - generic [ref=f59e305]:
+                              - radio "Code" [checked] [ref=f59e306] [cursor=pointer]
+                              - generic [ref=f59e307] [cursor=pointer]: Code
+                        - generic [ref=f59e309]:
+                          - generic [ref=f59e311]:
+                            - button "Loading metrics..." [disabled] [ref=f59e312] [cursor=pointer]
+                            - code [ref=f59e319]:
+                              - generic [ref=f59e320]:
+                                - generic [ref=f59e325]: "up{job=\"keycloak\"}"
+                                - textbox "Editor content;Press Alt+F1 for Accessibility Options." [ref=f59e330]: "up{job=\"keycloak\"}"
+                          - 'button "Options Legend: up {{pod}} Format: Time series Step: auto Type: Range Exemplars: false" [ref=f59e336] [cursor=pointer]':
+                            - generic [ref=f59e340]:
+                              - heading "Options" [level=6] [ref=f59e341]
+                              - generic [ref=f59e342]:
+                                - generic [ref=f59e343]: "Legend: up {{pod}}"
+                                - generic [ref=f59e344]: "Format: Time series"
+                                - generic [ref=f59e345]: "Step: auto"
+                                - generic [ref=f59e346]: "Type: Range"
+                                - generic [ref=f59e347]: "Exemplars: false"
+                - generic [ref=f59e348]:
+                  - button "Add query" [ref=f59e349] [cursor=pointer]
+                  - button "Query history" [ref=f59e353] [cursor=pointer]
+                  - button "Query inspector" [ref=f59e357] [cursor=pointer]
+              - generic:
+                - main
+  - generic [ref=f59e364]:
+    - alert
+    - alert
+    - complementary
+    - complementary
@@ -0,0 +1,56 @@
+- generic [ref=f62e4]:
+  - link "Skip to main content" [ref=f62e5] [cursor=pointer]:
+    - /url: "#pageContent"
+  - banner [ref=f62e7]:
+    - generic [ref=f62e8]:
+      - link [ref=f62e10] [cursor=pointer]:
+        - /url: /
+        - img "Grafana" [ref=f62e11]
+      - generic [ref=f62e14]:
+        - button "Search or jump to..." [ref=f62e18] [cursor=pointer]
+        - generic [ref=f62e19]: ctrl+k
+      - generic [ref=f62e23]:
+        - button "New" [ref=f62e24] [cursor=pointer]
+        - button "Help" [ref=f62e30] [cursor=pointer]
+        - button "News" [ref=f62e33] [cursor=pointer]
+        - button "Profile" [ref=f62e36] [cursor=pointer]:
+          - img "User avatar" [ref=f62e37]
+    - generic [ref=f62e38]:
+      - button "Open menu" [ref=f62e40] [cursor=pointer]
+      - navigation "Breadcrumbs" [ref=f62e43]:
+        - list [ref=f62e44]:
+          - listitem [ref=f62e45]:
+            - link "Home" [ref=f62e46] [cursor=pointer]:
+              - /url: /
+          - listitem [ref=f62e50]:
+            - link "Explore" [ref=f62e51] [cursor=pointer]:
+              - /url: /explore
+          - listitem [ref=f62e55]:
+            - generic "Prometheus" [ref=f62e56]
+      - generic [ref=f62e57]:
+        - button "Show more items" [ref=f62e60] [cursor=pointer]
+        - button "Toggle top search bar" [ref=f62e64] [cursor=pointer]
+  - main [ref=f62e70]:
+    - generic [ref=f62e72]:
+      - heading "Explore" [level=1] [ref=f62e73]
+      - generic [ref=f62e78]:
+        - navigation "Explore toolbar" [ref=f62e80]:
+          - navigation "Search links" [ref=f62e82]:
+            - generic [ref=f62e83]:
+              - button "Content outline" [expanded] [ref=f62e85] [cursor=pointer]:
+                - generic [ref=f62e88]: Outline
+              - generic [ref=f62e93] [cursor=pointer]:
+                - img "Prometheus logo" [ref=f62e95]
+                - textbox "Select a data source" [ref=f62e96]:
+                  - /placeholder: Prometheus
+          - button "Show more items" [ref=f62e102] [cursor=pointer]
+        - generic [ref=f62e106]:
+          - button "Collapse outline" [expanded] [ref=f62e112] [cursor=pointer]:
+            - img "arrow-from-right" [ref=f62e113]
+          - generic [ref=f62e119]:
+            - generic [ref=f62e122]:
+              - button "Add query" [ref=f62e123] [cursor=pointer]
+              - button "Query history" [ref=f62e127] [cursor=pointer]
+              - button "Query inspector" [ref=f62e131] [cursor=pointer]
+            - generic:
+              - main
@@ -0,0 +1,29 @@
+- generic [ref=f65e4]:
+  - link "Skip to main content" [ref=f65e5] [cursor=pointer]:
+    - /url: "#pageContent"
+  - banner [ref=f65e7]:
+    - generic [ref=f65e8]:
+      - link [ref=f65e10] [cursor=pointer]:
+        - /url: /
+        - img "Grafana" [ref=f65e11]
+      - generic [ref=f65e14]:
+        - button "Search or jump to..." [ref=f65e18] [cursor=pointer]
+        - generic [ref=f65e19]: ctrl+k
+      - generic [ref=f65e23]:
+        - button "New" [ref=f65e24] [cursor=pointer]
+        - button "Help" [ref=f65e30] [cursor=pointer]
+        - button "News" [ref=f65e33] [cursor=pointer]
+        - button "Profile" [ref=f65e36] [cursor=pointer]:
+          - img "User avatar" [ref=f65e37]
+    - generic [ref=f65e38]:
+      - button "Open menu" [ref=f65e40] [cursor=pointer]
+      - navigation "Breadcrumbs" [ref=f65e43]:
+        - list [ref=f65e44]:
+          - listitem [ref=f65e45]:
+            - link "Home" [ref=f65e46] [cursor=pointer]:
+              - /url: /
+          - listitem [ref=f65e50]:
+            - generic "Explore" [ref=f65e51]
+      - button "Toggle top search bar" [ref=f65e53] [cursor=pointer]
+  - main [ref=f65e59]:
+    - heading "Explore" [level=1] [ref=f65e62]
@@ -0,0 +1,16 @@
+- generic [ref=f68e3]:
+  - banner [ref=f68e4]:
+    - generic [ref=f68e5]: keycloak-patterns
+  - main [ref=f68e6]:
+    - heading "Sign in to your account" [level=1] [ref=f68e8]
+    - generic [ref=f68e12]:
+      - generic [ref=f68e13]:
+        - generic [ref=f68e14]: Username or email
+        - textbox "Username or email" [ref=f68e17]
+      - generic [ref=f68e18]:
+        - generic [ref=f68e19]: Password
+        - generic [ref=f68e21]:
+          - textbox "Password" [ref=f68e24]
+          - button "Show password" [ref=f68e26] [cursor=pointer]:
+            - generic [aria-hidden] [ref=f68e27]: 
+      - button "Sign In" [ref=f68e30] [cursor=pointer]
@@ -0,0 +1 @@
+- generic [active] [ref=f69e1]: "{ \"headers\" : { \"host\" : [ \"app2.hyeonworks.com\" ], \"user-agent\" : [ \"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/152.0.0.0 Safari/537.36\" ], \"accept\" : [ \"text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7\" ], \"accept-encoding\" : [ \"gzip, deflate, br, zstd\" ], \"accept-language\" : [ \"en-US,en;q=0.9\" ], \"cache-control\" : [ \"max-age=0\" ], \"cookie\" : [ \"grafana_session=bfb5f2c2406b3f163ea01063ac1b8b83; grafana_session_expiry=1788508427; _oauth2_proxy=djIuWDI5aGRYUm9NbDl3Y205NGVTMHhNamhoWXprNFpHSmxORGRoT0RObU16UmlNemMxTTJJd016ZGlZakpqTWcuQVVUYldxYkFlejYxNXozUUZBcGh1dw==|1788508274|biz4o9E4vZXX07LnF32LU7tIEMrvfwxwCIBsZkxpwbY=\" ], \"priority\" : [ \"u=0, i\" ], \"sec-ch-ua\" : [ \"\\\"Chromium\\\";v=\\\"152\\\", \\\"Not?A_Brand\\\";v=\\\"24\\\", \\\"Google Chrome\\\";v=\\\"152\\\"\" ], \"sec-ch-ua-mobile\" : [ \"?0\" ], \"sec-ch-ua-platform\" : [ \"\\\"Linux\\\"\" ], \"sec-fetch-dest\" : [ \"document\" ], \"sec-fetch-mode\" : [ \"navigate\" ], \"sec-fetch-site\" : [ \"same-site\" ], \"sec-fetch-user\" : [ \"?1\" ], \"upgrade-insecure-requests\" : [ \"1\" ], \"x-forwarded-email\" : [ \"labuser@example.com\" ], \"x-forwarded-host\" : [ \"app2.hyeonworks.com\" ], \"x-forwarded-port\" : [ \"443\" ], \"x-forwarded-preferred-username\" : [ \"labuser\" ], \"x-forwarded-proto\" : [ \"https\" ], \"x-forwarded-server\" : [ \"traefik-5d6fcf895-wpfhr\" ], \"x-forwarded-user\" : [ \"27df5ea9-8703-4ec5-badd-d972c583e1ff\" ], \"x-real-ip\" : [ \"100.123.124.30\" ] }, \"remoteAddr\" : \"100.123.124.30\", \"localAddr\" : \"10.42.1.132\", \"scheme\" : \"https\", \"secure\" : true, \"serverName\" : \"app2.hyeonworks.com\", \"serverPort\" : 443, \"requestUrl\" : \"https://app2.hyeonworks.com/api/echo\" }"
@@ -0,0 +1 @@
+- generic [ref=f70e1]: "{ \"headers\" : { \"host\" : [ \"app2.hyeonworks.com\" ], \"user-agent\" : [ \"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/152.0.0.0 Safari/537.36\" ], \"accept\" : [ \"text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7\" ], \"accept-encoding\" : [ \"gzip, deflate, br, zstd\" ], \"accept-language\" : [ \"en-US,en;q=0.9\" ], \"cookie\" : [ \"grafana_session=bfb5f2c2406b3f163ea01063ac1b8b83; grafana_session_expiry=1788508427; _oauth2_proxy=djIuWDI5aGRYUm9NbDl3Y205NGVTMWhOakZqTlRjM1ptSTVORFF5TVdWbU1qQmpaak5pWXpka1pXRTFPR1F6WWcuOXF3TmRyQzJIOFlrSDh6T1pTMl91QQ==|1788508374|Ehcd4hjNk0noEy2MSPI-C5jg84JZmilWcKhuj8OH3uw=\" ], \"priority\" : [ \"u=0, i\" ], \"sec-ch-ua\" : [ \"\\\"Chromium\\\";v=\\\"152\\\", \\\"Not?A_Brand\\\";v=\\\"24\\\", \\\"Google Chrome\\\";v=\\\"152\\\"\" ], \"sec-ch-ua-mobile\" : [ \"?0\" ], \"sec-ch-ua-platform\" : [ \"\\\"Linux\\\"\" ], \"sec-fetch-dest\" : [ \"document\" ], \"sec-fetch-mode\" : [ \"navigate\" ], \"sec-fetch-site\" : [ \"none\" ], \"sec-fetch-user\" : [ \"?1\" ], \"upgrade-insecure-requests\" : [ \"1\" ], \"x-forwarded-email\" : [ \"changed-labuser@example.com\" ], \"x-forwarded-host\" : [ \"app2.hyeonworks.com\" ], \"x-forwarded-port\" : [ \"443\" ], \"x-forwarded-preferred-username\" : [ \"labuser\" ], \"x-forwarded-proto\" : [ \"https\" ], \"x-forwarded-server\" : [ \"traefik-5d6fcf895-wpfhr\" ], \"x-forwarded-user\" : [ \"27df5ea9-8703-4ec5-badd-d972c583e1ff\" ], \"x-real-ip\" : [ \"100.123.124.30\" ] }, \"remoteAddr\" : \"100.123.124.30\", \"localAddr\" : \"10.42.0.53\", \"scheme\" : \"https\", \"secure\" : true, \"serverName\" : \"app2.hyeonworks.com\", \"serverPort\" : 443, \"requestUrl\" : \"https://app2.hyeonworks.com/api/echo\" }"
@@ -0,0 +1,12 @@
+# 다이어그램 규약
+
+| 표현 | 뜻 |
+|---|---|
+| 실선 상자 | 살아 있는 구성 요소 |
+| 붉은 점선 상자 | 이 실험에서 죽이거나 막은 것 |
+| ✂ 붉은 X | 주입 지점 |
+| 실선 화살표 | 정상 경로 |
+| 붉은 점선 화살표 | 실험에서 깨진 경로 |
+| 회색 글씨 | 측정값 |
+
+SVG 는 GitHub 에서 그대로 렌더링되며 외부 폰트를 쓰지 않는다.
@@ -0,0 +1,26 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 700 300" width="700" height="300" font-family="system-ui,-apple-system,Segoe UI,Roboto,sans-serif">
+  <style>
+    .t{font-size:13px;fill:#1f2328}.s{font-size:11px;fill:#59636e}.h{font-size:14px;font-weight:600;fill:#1f2328}
+    .r{font-size:12px;fill:#cf222e;font-weight:600}
+    .box{fill:#fff;stroke:#8c959f;stroke-width:1.4;rx:6}
+    .dead{fill:#fff5f5;stroke:#cf222e;stroke-width:1.6;stroke-dasharray:5 3;rx:6}
+    .ok{fill:#f6fdf6;stroke:#1a7f37;stroke-width:1.6;rx:6}
+    .ln{stroke:#59636e;stroke-width:1.4;fill:none;marker-end:url(#a)}
+    .bad{stroke:#cf222e;stroke-width:1.6;stroke-dasharray:5 3;fill:none;marker-end:url(#b)}
+  </style>
+  <defs>
+    <marker id="a" markerWidth="9" markerHeight="9" refX="8" refY="4.5" orient="auto"><path d="M0,0 L9,4.5 L0,9 z" fill="#59636e"/></marker>
+    <marker id="b" markerWidth="9" markerHeight="9" refX="8" refY="4.5" orient="auto"><path d="M0,0 L9,4.5 L0,9 z" fill="#cf222e"/></marker>
+  </defs>
+  <text class="h" x="16" y="24">A-2 · PostgreSQL 정지 — 살아남는 노드가 없다</text>
+  <rect class="box" x="30" y="46" width="180" height="52"/><text class="t" x="120" y="68" text-anchor="middle">keycloak-1</text><text class="s" x="120" y="86" text-anchor="middle">캐시: 세션 N개</text>
+  <rect class="box" x="480" y="46" width="180" height="52"/><text class="t" x="570" y="68" text-anchor="middle">keycloak-0</text><text class="s" x="570" y="86" text-anchor="middle">캐시: 세션 M개</text>
+  <path class="ln" d="M210,72 L480,72"/><text class="s" x="345" y="66" text-anchor="middle">7800 · 살아 있다</text>
+  <path class="bad" d="M120,100 L300,150"/><path class="bad" d="M570,100 L400,150"/>
+  <rect class="dead" x="270" y="156" width="160" height="52"/>
+  <text class="r" x="350" y="178" text-anchor="middle">postgres ✗</text><text class="s" x="350" y="196" text-anchor="middle">replicas=0</text>
+  <rect class="dead" x="30" y="228" width="290" height="52"/>
+  <text class="r" x="175" y="250" text-anchor="middle">양쪽 모두 NotReady</text><text class="s" x="175" y="268" text-anchor="middle">ready 주소 = [] · 외부 503</text>
+  <rect class="box" x="370" y="228" width="290" height="52"/>
+  <text class="t" x="515" y="250" text-anchor="middle">up{job="keycloak"} = 1</text><text class="s" x="515" y="268" text-anchor="middle">프로세스는 살아 있다 — up 은 못 잡는다</text>
+</svg>
@@ -0,0 +1,36 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 720 330" width="720" height="330" font-family="system-ui,-apple-system,Segoe UI,Roboto,sans-serif">
+  <style>
+    .t{font-size:13px;fill:#1f2328}.s{font-size:11px;fill:#59636e}.h{font-size:14px;font-weight:600;fill:#1f2328}
+    .r{font-size:12px;fill:#cf222e;font-weight:600}.g{font-size:12px;fill:#1a7f37;font-weight:600}
+    .box{fill:#fff;stroke:#8c959f;stroke-width:1.4;rx:6}
+    .ok{fill:#f6fdf6;stroke:#1a7f37;stroke-width:1.6;rx:6}
+    .dead{fill:#fff5f5;stroke:#cf222e;stroke-width:1.6;stroke-dasharray:5 3;rx:6}
+    .ln{stroke:#59636e;stroke-width:1.4;fill:none;marker-end:url(#a)}
+  </style>
+  <defs><marker id="a" markerWidth="9" markerHeight="9" refX="8" refY="4.5" orient="auto"><path d="M0,0 L9,4.5 L0,9 z" fill="#59636e"/></marker></defs>
+  <text class="h" x="16" y="24">A-7 · 같은 주입, 같은 관측, 정반대 결과</text>
+
+  <text class="h" x="180" y="52" text-anchor="middle">persistent (KC 26 기본)</text>
+  <rect class="box" x="30" y="62" width="300" height="54"/>
+  <text class="t" x="180" y="84" text-anchor="middle">keycloak ×2 — 로컬 캐시</text>
+  <path class="ln" d="M180,116 L180,140"/>
+  <rect class="ok" x="70" y="142" width="220" height="40"/>
+  <text class="g" x="180" y="167" text-anchor="middle">PostgreSQL — 진실의 원천</text>
+
+  <text class="h" x="540" y="52" text-anchor="middle">volatile (KC 24 이전 방식)</text>
+  <rect class="box" x="390" y="62" width="300" height="54"/>
+  <text class="t" x="540" y="84" text-anchor="middle">keycloak ×2 — 캐시가 곧 진실</text>
+  <path class="ln" d="M470,116 L470,140"/><path class="ln" d="M610,140 L610,116"/>
+  <rect class="ok" x="430" y="142" width="220" height="40"/>
+  <text class="g" x="540" y="167" text-anchor="middle">클러스터 복제 (7800)</text>
+
+  <rect class="box" x="30" y="202" width="660" height="112"/>
+  <text class="t" x="360" y="224" text-anchor="middle">뒤집힌 세 결과</text>
+  <text class="s" x="200" y="248" text-anchor="middle">A-1 7800 차단 후 교차 refresh</text>
+  <text class="g" x="430" y="248" text-anchor="middle">200</text><text class="r" x="560" y="248" text-anchor="middle">400 Session not active</text>
+  <text class="s" x="200" y="272" text-anchor="middle">A-8 롤링 재시작 후 refresh</text>
+  <text class="g" x="430" y="272" text-anchor="middle">200</text><text class="r" x="560" y="272" text-anchor="middle">400 Session not active</text>
+  <text class="s" x="200" y="296" text-anchor="middle">A-2 DB 정지 중 새 로그인</text>
+  <text class="r" x="430" y="296" text-anchor="middle">500</text><text class="g" x="560" y="296" text-anchor="middle">200</text>
+  <text class="s" x="430" y="230" text-anchor="middle">persistent</text><text class="s" x="560" y="230" text-anchor="middle">volatile</text>
+</svg>
@@ -0,0 +1,33 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 700 330" width="700" height="330" font-family="system-ui,-apple-system,Segoe UI,Roboto,sans-serif">
+  <style>
+    .t{font-size:13px;fill:#1f2328}.s{font-size:11px;fill:#59636e}.h{font-size:14px;font-weight:600;fill:#1f2328}
+    .r{font-size:12px;fill:#cf222e;font-weight:600}
+    .box{fill:#fff;stroke:#8c959f;stroke-width:1.4;rx:6}
+    .dead{fill:#fff5f5;stroke:#cf222e;stroke-width:1.6;stroke-dasharray:5 3;rx:6}
+    .ok{fill:#f6fdf6;stroke:#1a7f37;stroke-width:1.6;rx:6}
+    .ln{stroke:#59636e;stroke-width:1.4;fill:none;marker-end:url(#a)}
+    .bad{stroke:#cf222e;stroke-width:1.6;stroke-dasharray:5 3;fill:none;marker-end:url(#b)}
+  </style>
+  <defs>
+    <marker id="a" markerWidth="9" markerHeight="9" refX="8" refY="4.5" orient="auto"><path d="M0,0 L9,4.5 L0,9 z" fill="#59636e"/></marker>
+    <marker id="b" markerWidth="9" markerHeight="9" refX="8" refY="4.5" orient="auto"><path d="M0,0 L9,4.5 L0,9 z" fill="#cf222e"/></marker>
+  </defs>
+  <text class="h" x="16" y="24">B-1 · Redis 는 세션만 옮기고 토큰은 두고 간다</text>
+  <rect class="box" x="30" y="46" width="140" height="46"/><text class="t" x="100" y="66" text-anchor="middle">bff-0</text><text class="s" x="100" y="82" text-anchor="middle">kc-lab-1</text>
+  <rect class="box" x="30" y="104" width="140" height="46"/><text class="t" x="100" y="124" text-anchor="middle">bff-1</text><text class="s" x="100" y="140" text-anchor="middle">kc-lab-2</text>
+  <rect class="ok" x="330" y="46" width="330" height="60"/>
+  <text class="t" x="495" y="68" text-anchor="middle">Redis — Application Session</text>
+  <text class="s" x="495" y="86" text-anchor="middle">sessionRepository → RedisSessionRepository ✔ 옮겨졌다</text>
+  <text class="s" x="495" y="100" text-anchor="middle">필드: SPRING_SECURITY_CONTEXT · TTL 1772초</text>
+  <rect class="dead" x="330" y="122" width="330" height="60"/>
+  <text class="r" x="495" y="144" text-anchor="middle">프로세스 메모리 — OAuth2AuthorizedClient</text>
+  <text class="s" x="495" y="162" text-anchor="middle">InMemoryOAuth2AuthorizedClientService ✗ 그대로</text>
+  <text class="s" x="495" y="176" text-anchor="middle">access token · refresh token 이 여기 있다</text>
+  <path class="ln" d="M170,69 L330,69"/><path class="ln" d="M170,127 L330,80"/>
+  <path class="bad" d="M170,140 L330,150"/>
+  <rect class="box" x="30" y="210" width="630" height="90"/>
+  <text class="t" x="345" y="234" text-anchor="middle">그 결과 사용자에게 보이는 것</text>
+  <text class="s" x="345" y="256" text-anchor="middle">principal: labuser        ← 로그인은 되어 있다</text>
+  <text class="s" x="345" y="272" text-anchor="middle">accessTokenStoredOnServer: false   ← 토큰이 없다</text>
+  <text class="r" x="345" y="292" text-anchor="middle">완전히 로그아웃되는 편이 차라리 낫다</text>
+</svg>
@@ -0,0 +1,29 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 700 300" width="700" height="300" font-family="system-ui,-apple-system,Segoe UI,Roboto,sans-serif">
+  <style>
+    .t{font-size:13px;fill:#1f2328}.s{font-size:11px;fill:#59636e}.h{font-size:14px;font-weight:600;fill:#1f2328}
+    .r{font-size:12px;fill:#cf222e;font-weight:600}
+    .box{fill:#fff;stroke:#8c959f;stroke-width:1.4;rx:6}
+    .dead{fill:#fff5f5;stroke:#cf222e;stroke-width:1.6;stroke-dasharray:5 3;rx:6}
+    .ok{fill:#f6fdf6;stroke:#1a7f37;stroke-width:1.6;rx:6}
+    .ln{stroke:#59636e;stroke-width:1.4;fill:none;marker-end:url(#a)}
+    .bad{stroke:#cf222e;stroke-width:1.6;stroke-dasharray:5 3;fill:none;marker-end:url(#b)}
+  </style>
+  <defs>
+    <marker id="a" markerWidth="9" markerHeight="9" refX="8" refY="4.5" orient="auto"><path d="M0,0 L9,4.5 L0,9 z" fill="#59636e"/></marker>
+    <marker id="b" markerWidth="9" markerHeight="9" refX="8" refY="4.5" orient="auto"><path d="M0,0 L9,4.5 L0,9 z" fill="#cf222e"/></marker>
+  </defs>
+  <text class="h" x="16" y="24">B-3 · 동시 refresh — 경쟁이 아니라 세션 파괴</text>
+  <rect class="box" x="30" y="46" width="150" height="40"/><text class="t" x="105" y="71" text-anchor="middle">같은 refresh token ×5</text>
+  <path class="ln" d="M180,66 L280,66"/>
+  <rect class="box" x="280" y="42" width="180" height="48"/><text class="t" x="370" y="62" text-anchor="middle">Keycloak</text>
+  <text class="s" x="370" y="80" text-anchor="middle">rotation ON · maxReuse=0</text>
+  <path class="ln" d="M460,58 L560,58"/><rect class="box" x="560" y="42" width="110" height="24"/><text class="s" x="615" y="58" text-anchor="middle">1× HTTP 200</text>
+  <path class="bad" d="M460,78 L560,78"/><rect class="dead" x="560" y="66" width="110" height="24"/><text class="s" x="615" y="82" text-anchor="middle">4× HTTP 400</text>
+  <rect class="dead" x="120" y="120" width="460" height="70"/>
+  <text class="r" x="350" y="144" text-anchor="middle">재사용 탐지가 client session 을 제거한다</text>
+  <text class="s" x="350" y="164" text-anchor="middle">user_session 은 남고 client_session = 0 (정상 세션은 1)</text>
+  <text class="s" x="350" y="180" text-anchor="middle">그래서 오류가 "Session doesn't have required client"</text>
+  <rect class="dead" x="120" y="210" width="460" height="60"/>
+  <text class="r" x="350" y="234" text-anchor="middle">★ 이긴 요청의 새 토큰도 곧바로 400</text>
+  <text class="s" x="350" y="254" text-anchor="middle">재시도로 회복 불가 → Q2 의 판정은 lock</text>
+</svg>
@@ -0,0 +1,37 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 700 290" width="700" height="290" font-family="system-ui,-apple-system,Segoe UI,Roboto,sans-serif">
+  <style>
+    .t{font-size:13px;fill:#1f2328}.s{font-size:11px;fill:#59636e}.h{font-size:14px;font-weight:600;fill:#1f2328}
+    .r{font-size:12px;fill:#cf222e;font-weight:600}.g{font-size:12px;fill:#1a7f37;font-weight:600}
+    .box{fill:#fff;stroke:#8c959f;stroke-width:1.4;rx:6}
+    .dead{fill:#fff5f5;stroke:#cf222e;stroke-width:1.6;stroke-dasharray:5 3;rx:6}
+    .ok{fill:#f6fdf6;stroke:#1a7f37;stroke-width:1.6;rx:6}
+    .ln{stroke:#59636e;stroke-width:1.4;fill:none;marker-end:url(#a)}
+    .bad{stroke:#cf222e;stroke-width:1.6;stroke-dasharray:5 3;fill:none;marker-end:url(#b)}
+  </style>
+  <defs>
+    <marker id="a" markerWidth="9" markerHeight="9" refX="8" refY="4.5" orient="auto"><path d="M0,0 L9,4.5 L0,9 z" fill="#59636e"/></marker>
+    <marker id="b" markerWidth="9" markerHeight="9" refX="8" refY="4.5" orient="auto"><path d="M0,0 L9,4.5 L0,9 z" fill="#cf222e"/></marker>
+  </defs>
+  <text class="h" x="16" y="24">B-4 · edge 가 설정하지 않은 헤더는 그대로 통과한다</text>
+  <rect class="box" x="30" y="46" width="130" height="60"/><text class="t" x="95" y="68" text-anchor="middle">공격자</text>
+  <text class="s" x="95" y="86" text-anchor="middle">X-Auth-Request-</text><text class="s" x="95" y="100" text-anchor="middle">Roles: admin</text>
+  <path class="ln" d="M160,76 L250,76"/>
+  <rect class="box" x="250" y="40" width="180" height="72"/><text class="t" x="340" y="62" text-anchor="middle">nginx</text>
+  <text class="s" x="340" y="82" text-anchor="middle">proxy_set_header 한 것만 덮어쓴다</text>
+  <text class="r" x="340" y="100" text-anchor="middle">X-Auth-Request-* 는 설정이 없다</text>
+  <path class="bad" d="M430,76 L520,76"/>
+  <rect class="dead" x="520" y="46" width="150" height="60"/>
+  <text class="r" x="595" y="68" text-anchor="middle">upstream</text>
+  <text class="s" x="595" y="86" text-anchor="middle">['viewer','admin']</text><text class="s" x="595" y="100" text-anchor="middle">둘 다 도착 · 검증 없음</text>
+  <rect class="box" x="30" y="134" width="310" height="66"/>
+  <text class="t" x="185" y="156" text-anchor="middle">구분자 문제</text>
+  <text class="s" x="185" y="176" text-anchor="middle">"admin,editor" 와 "role-with,comma" 가</text>
+  <text class="s" x="185" y="192" text-anchor="middle">도착 시점에 구별되지 않는다</text>
+  <rect class="box" x="360" y="134" width="310" height="66"/>
+  <text class="t" x="515" y="156" text-anchor="middle">크기는 절벽이다</text>
+  <text class="s" x="515" y="176" text-anchor="middle">4KB 통과 · 8KB → Tomcat 400</text>
+  <text class="s" x="515" y="192" text-anchor="middle">16KB → 연결 끊김 (nginx)</text>
+  <rect class="dead" x="30" y="222" width="640" height="50"/>
+  <text class="r" x="350" y="244" text-anchor="middle">헤더가 인가 근거가 되면 위조 가능성이 곧 권한 상승이다</text>
+  <text class="s" x="350" y="262" text-anchor="middle">Q4 의 5문항 중 2·4번 해당 → Q4 자신의 기준으로 BFF 구조</text>
+</svg>
@@ -0,0 +1,35 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 700 300" width="700" height="300" font-family="system-ui,-apple-system,Segoe UI,Roboto,sans-serif">
+  <style>
+    .t{font-size:13px;fill:#1f2328}.s{font-size:11px;fill:#59636e}.h{font-size:14px;font-weight:600;fill:#1f2328}
+    .r{font-size:12px;fill:#cf222e;font-weight:600}.g{font-size:12px;fill:#1a7f37;font-weight:600}
+    .box{fill:#fff;stroke:#8c959f;stroke-width:1.4;rx:6}
+    .dead{fill:#fff5f5;stroke:#cf222e;stroke-width:1.6;stroke-dasharray:5 3;rx:6}
+    .ok{fill:#f6fdf6;stroke:#1a7f37;stroke-width:1.6;rx:6}
+    .ln{stroke:#59636e;stroke-width:1.4;fill:none;marker-end:url(#a)}
+    .bad{stroke:#cf222e;stroke-width:1.6;stroke-dasharray:5 3;fill:none;marker-end:url(#b)}
+  </style>
+  <defs>
+    <marker id="a" markerWidth="9" markerHeight="9" refX="8" refY="4.5" orient="auto"><path d="M0,0 L9,4.5 L0,9 z" fill="#59636e"/></marker>
+    <marker id="b" markerWidth="9" markerHeight="9" refX="8" refY="4.5" orient="auto"><path d="M0,0 L9,4.5 L0,9 z" fill="#cf222e"/></marker>
+  </defs>
+  <text class="h" x="16" y="24">B-5 · 파드가 Ready 인 채로 계속 실패한다</text>
+  <rect class="box" x="30" y="46" width="180" height="76"/>
+  <text class="t" x="120" y="68" text-anchor="middle">bff ×2</text>
+  <text class="g" x="120" y="90" text-anchor="middle">Ready = true</text>
+  <text class="s" x="120" y="110" text-anchor="middle">Service 에 그대로 남는다</text>
+  <path class="bad" d="M210,84 L330,84"/>
+  <rect class="dead" x="330" y="58" width="160" height="52"/>
+  <text class="r" x="410" y="80" text-anchor="middle">redis ✗</text><text class="s" x="410" y="98" text-anchor="middle">replicas=0</text>
+  <rect class="box" x="30" y="146" width="310" height="110"/>
+  <text class="t" x="185" y="168" text-anchor="middle">health group 이 갈랐다</text>
+  <text class="r" x="185" y="192" text-anchor="middle">/actuator/health → 503</text>
+  <text class="g" x="185" y="214" text-anchor="middle">/actuator/health/readiness → 200 UP</text>
+  <text class="s" x="185" y="238" text-anchor="middle">redis 지표가 readiness 그룹에 없다</text>
+  <rect class="box" x="360" y="146" width="310" height="110"/>
+  <text class="t" x="515" y="168" text-anchor="middle">A-2 와 정반대</text>
+  <text class="s" x="515" y="192" text-anchor="middle">A-2 Keycloak: DB 검사가 readiness 에</text>
+  <text class="s" x="515" y="208" text-anchor="middle">→ NotReady → 503 (명확)</text>
+  <text class="s" x="515" y="230" text-anchor="middle">B-5 BFF: 없음 → Ready 유지</text>
+  <text class="r" x="515" y="248" text-anchor="middle">→ HTTP 000 (멈춤)</text>
+  <text class="s" x="16" y="284">영속화: 볼륨 없이 AOF 만 켜면 appendonlydir 은 생기지만 파드 삭제로 전부 사라진다 — 볼륨이 먼저다</text>
+</svg>
@@ -0,0 +1,34 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 700 260" width="700" height="260" font-family="system-ui,-apple-system,Segoe UI,Roboto,sans-serif">
+  <style>
+    .t{font-size:13px;fill:#1f2328}.s{font-size:11px;fill:#59636e}.h{font-size:14px;font-weight:600;fill:#1f2328}
+    .r{font-size:12px;fill:#cf222e;font-weight:600}.g{font-size:12px;fill:#1a7f37;font-weight:600}
+    .box{fill:#fff;stroke:#8c959f;stroke-width:1.4;rx:6}
+    .dead{fill:#fff5f5;stroke:#cf222e;stroke-width:1.6;stroke-dasharray:5 3;rx:6}
+    .ok{fill:#f6fdf6;stroke:#1a7f37;stroke-width:1.6;rx:6}
+    .ln{stroke:#59636e;stroke-width:1.4;fill:none;marker-end:url(#a)}
+    .bad{stroke:#cf222e;stroke-width:1.6;stroke-dasharray:5 3;fill:none;marker-end:url(#b)}
+  </style>
+  <defs>
+    <marker id="a" markerWidth="9" markerHeight="9" refX="8" refY="4.5" orient="auto"><path d="M0,0 L9,4.5 L0,9 z" fill="#59636e"/></marker>
+    <marker id="b" markerWidth="9" markerHeight="9" refX="8" refY="4.5" orient="auto"><path d="M0,0 L9,4.5 L0,9 z" fill="#cf222e"/></marker>
+  </defs>
+  <text class="h" x="16" y="24">B-6 · 회전은 안전하고 옛 키를 버리는 순간이 위험하다</text>
+  <rect class="ok" x="30" y="46" width="190" height="76"/>
+  <text class="t" x="125" y="68" text-anchor="middle">t0 — 키 A 만</text>
+  <text class="s" x="125" y="88" text-anchor="middle">발급 A · 검증 A</text>
+  <text class="s" x="125" y="108" text-anchor="middle">JWKS RS256 1개</text>
+  <path class="ln" d="M220,84 L255,84"/>
+  <rect class="ok" x="255" y="46" width="190" height="76"/>
+  <text class="t" x="350" y="68" text-anchor="middle">t1 — B 추가 (priority 200)</text>
+  <text class="g" x="350" y="88" text-anchor="middle">발급 B · 검증 A+B</text>
+  <text class="s" x="350" y="108" text-anchor="middle">옛 토큰 200 · 새 토큰 200</text>
+  <path class="bad" d="M445,84 L480,84"/>
+  <rect class="dead" x="480" y="46" width="190" height="76"/>
+  <text class="t" x="575" y="68" text-anchor="middle">t2 — A 제거</text>
+  <text class="r" x="575" y="88" text-anchor="middle">옛 토큰 즉시 401</text>
+  <text class="s" x="575" y="108" text-anchor="middle">캐시가 유예를 주지 않는다</text>
+  <rect class="box" x="30" y="146" width="640" height="60"/>
+  <text class="t" x="350" y="168" text-anchor="middle">겹침 구간(t1~t2)의 최소 길이 = 옛 키로 서명된 것 중 가장 오래 사는 것의 수명</text>
+  <text class="s" x="350" y="190" text-anchor="middle">access token 60초 · refresh token 1800초 → 최소 30분</text>
+  <text class="s" x="16" y="234">모르는 kid 를 만나면 JWKS 를 다시 받으므로 제거가 즉시 반영된다. 유예는 옛 키를 남겨두는 기간으로 만든다.</text>
+</svg>
@@ -0,0 +1,31 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 700 300" width="700" height="300" font-family="system-ui,-apple-system,Segoe UI,Roboto,sans-serif">
+  <style>
+    .t{font-size:13px;fill:#1f2328}.s{font-size:11px;fill:#59636e}.h{font-size:14px;font-weight:600;fill:#1f2328}
+    .r{font-size:12px;fill:#cf222e;font-weight:600}.g{font-size:12px;fill:#1a7f37;font-weight:600}
+    .box{fill:#fff;stroke:#8c959f;stroke-width:1.4;rx:6}
+    .dead{fill:#fff5f5;stroke:#cf222e;stroke-width:1.6;stroke-dasharray:5 3;rx:6}
+    .ok{fill:#f6fdf6;stroke:#1a7f37;stroke-width:1.6;rx:6}
+    .ln{stroke:#59636e;stroke-width:1.4;fill:none;marker-end:url(#a)}
+    .bad{stroke:#cf222e;stroke-width:1.6;stroke-dasharray:5 3;fill:none;marker-end:url(#b)}
+  </style>
+  <defs>
+    <marker id="a" markerWidth="9" markerHeight="9" refX="8" refY="4.5" orient="auto"><path d="M0,0 L9,4.5 L0,9 z" fill="#59636e"/></marker>
+    <marker id="b" markerWidth="9" markerHeight="9" refX="8" refY="4.5" orient="auto"><path d="M0,0 L9,4.5 L0,9 z" fill="#cf222e"/></marker>
+  </defs>
+  <text class="h" x="16" y="24">C-1 · SSO 의 구조와 IdP 로그아웃의 한계</text>
+  <rect class="box" x="220" y="42" width="260" height="52"/>
+  <text class="t" x="350" y="64" text-anchor="middle">Keycloak user session ×1</text>
+  <text class="s" x="350" y="82" text-anchor="middle">oqOjHekin4JU-BZjgQLjUByW</text>
+  <path class="ln" d="M300,96 L180,130"/><path class="ln" d="M400,96 L520,130"/>
+  <rect class="box" x="60" y="134" width="240" height="52"/>
+  <text class="t" x="180" y="156" text-anchor="middle">client session — bff-confidential</text>
+  <text class="s" x="180" y="174" text-anchor="middle">app1 · Redis 세션 + PostgreSQL 토큰</text>
+  <rect class="box" x="400" y="134" width="240" height="52"/>
+  <text class="t" x="520" y="156" text-anchor="middle">client session — oauth2-proxy</text>
+  <text class="s" x="520" y="174" text-anchor="middle">app2 · 쿠키 티켓 + Redis 세션</text>
+  <rect class="dead" x="220" y="206" width="260" height="40"/>
+  <text class="r" x="350" y="231" text-anchor="middle">IdP 세션 삭제 ✗</text>
+  <path class="bad" d="M300,246 L200,262"/><path class="bad" d="M400,246 L500,262"/>
+  <rect class="ok" x="60" y="256" width="240" height="34"/><text class="g" x="180" y="278" text-anchor="middle">app1 그대로 동작</text>
+  <rect class="ok" x="400" y="256" width="240" height="34"/><text class="g" x="520" y="278" text-anchor="middle">app2 그대로 동작</text>
+</svg>
@@ -0,0 +1,30 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 700 270" width="700" height="270" font-family="system-ui,-apple-system,Segoe UI,Roboto,sans-serif">
+  <style>
+    .t{font-size:13px;fill:#1f2328}.s{font-size:11px;fill:#59636e}.h{font-size:14px;font-weight:600;fill:#1f2328}
+    .r{font-size:12px;fill:#cf222e;font-weight:600}.g{font-size:12px;fill:#1a7f37;font-weight:600}
+    .box{fill:#fff;stroke:#8c959f;stroke-width:1.4;rx:6}
+    .dead{fill:#fff5f5;stroke:#cf222e;stroke-width:1.6;stroke-dasharray:5 3;rx:6}
+    .ok{fill:#f6fdf6;stroke:#1a7f37;stroke-width:1.6;rx:6}
+    .ln{stroke:#59636e;stroke-width:1.4;fill:none;marker-end:url(#a)}
+    .bad{stroke:#cf222e;stroke-width:1.6;stroke-dasharray:5 3;fill:none;marker-end:url(#b)}
+  </style>
+  <defs>
+    <marker id="a" markerWidth="9" markerHeight="9" refX="8" refY="4.5" orient="auto"><path d="M0,0 L9,4.5 L0,9 z" fill="#59636e"/></marker>
+    <marker id="b" markerWidth="9" markerHeight="9" refX="8" refY="4.5" orient="auto"><path d="M0,0 L9,4.5 L0,9 z" fill="#cf222e"/></marker>
+  </defs>
+  <text class="h" x="16" y="24">D-1 · 빈 데이터베이스가 200 을 냈다</text>
+  <rect class="box" x="30" y="46" width="180" height="46"/><text class="t" x="120" y="66" text-anchor="middle">pg_dump</text><text class="s" x="120" y="82" text-anchor="middle">395KB · 101 테이블 · 세션 포함</text>
+  <path class="ln" d="M210,69 L270,69"/>
+  <rect class="dead" x="270" y="42" width="180" height="54"/>
+  <text class="r" x="360" y="64" text-anchor="middle">DROP SCHEMA CASCADE</text><text class="s" x="360" y="84" text-anchor="middle">남은 테이블 0</text>
+  <path class="ln" d="M450,69 L510,69"/>
+  <rect class="ok" x="510" y="42" width="160" height="54"/>
+  <text class="g" x="590" y="64" text-anchor="middle">복구 1초</text><text class="s" x="590" y="84" text-anchor="middle">오류 0건 · 재시작 0회</text>
+  <rect class="box" x="30" y="118" width="640" height="76"/>
+  <text class="t" x="350" y="140" text-anchor="middle">테이블이 0개일 때 무엇이 깨졌는가 — 전부가 아니다</text>
+  <text class="g" x="350" y="162" text-anchor="middle">/protocol/openid-connect/certs → 200   (realm 키가 캐시에 있다)</text>
+  <text class="r" x="350" y="182" text-anchor="middle">/.well-known → 500      토큰 발급 → 400</text>
+  <rect class="dead" x="30" y="210" width="640" height="46"/>
+  <text class="r" x="350" y="232" text-anchor="middle">헬스체크는 "DB 가 살아 있다"만 보고 "데이터가 있다"는 안 본다</text>
+  <text class="s" x="350" y="250" text-anchor="middle">RPO = 백업 주기 + A-3 의 synchronous_commit 손실 · 덤프는 같은 호스트 /tmp 에 있었다</text>
+</svg>
@@ -0,0 +1,31 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 700 280" width="700" height="280" font-family="system-ui,-apple-system,Segoe UI,Roboto,sans-serif">
+  <style>
+    .t{font-size:13px;fill:#1f2328}.s{font-size:11px;fill:#59636e}.h{font-size:14px;font-weight:600;fill:#1f2328}
+    .r{font-size:12px;fill:#cf222e;font-weight:600}.g{font-size:12px;fill:#1a7f37;font-weight:600}
+    .box{fill:#fff;stroke:#8c959f;stroke-width:1.4;rx:6}
+    .dead{fill:#fff5f5;stroke:#cf222e;stroke-width:1.6;stroke-dasharray:5 3;rx:6}
+    .ok{fill:#f6fdf6;stroke:#1a7f37;stroke-width:1.6;rx:6}
+    .ln{stroke:#59636e;stroke-width:1.4;fill:none;marker-end:url(#a)}
+    .bad{stroke:#cf222e;stroke-width:1.6;stroke-dasharray:5 3;fill:none;marker-end:url(#b)}
+  </style>
+  <defs>
+    <marker id="a" markerWidth="9" markerHeight="9" refX="8" refY="4.5" orient="auto"><path d="M0,0 L9,4.5 L0,9 z" fill="#59636e"/></marker>
+    <marker id="b" markerWidth="9" markerHeight="9" refX="8" refY="4.5" orient="auto"><path d="M0,0 L9,4.5 L0,9 z" fill="#cf222e"/></marker>
+  </defs>
+  <text class="h" x="16" y="24">D-3 · 네 경로 중 RBAC 만 실제로 감춘다</text>
+  <rect class="dead" x="30" y="46" width="310" height="60"/>
+  <text class="r" x="185" y="68" text-anchor="middle">kubectl get -o jsonpath | base64 -d</text>
+  <text class="s" x="185" y="88" text-anchor="middle">POSTGRES_PASSWORD = lab-postgres-change-me</text>
+  <rect class="dead" x="360" y="46" width="310" height="60"/>
+  <text class="r" x="515" y="68" text-anchor="middle">저장소 (at rest)</text>
+  <text class="s" x="515" y="88" text-anchor="middle">Encryption Disabled · state.db 에 평문</text>
+  <rect class="dead" x="30" y="120" width="310" height="60"/>
+  <text class="r" x="185" y="142" text-anchor="middle">파드 안</text>
+  <text class="s" x="185" y="162" text-anchor="middle">KEYCLOAK_CLIENT_SECRET=... 환경변수</text>
+  <rect class="ok" x="360" y="120" width="310" height="60"/>
+  <text class="g" x="515" y="142" text-anchor="middle">RBAC</text>
+  <text class="s" x="515" y="162" text-anchor="middle">default SA 는 get secrets 불가</text>
+  <rect class="box" x="30" y="200" width="640" height="60"/>
+  <text class="t" x="350" y="222" text-anchor="middle">describe 는 "14 bytes" 만 보여줘 감춰졌다는 착각을 준다</text>
+  <text class="s" x="350" y="244" text-anchor="middle">base64 는 감추기 위한 것이 아니라 YAML 에 임의 바이트를 담기 위한 인코딩이다</text>
+</svg>
@@ -0,0 +1,30 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 700 250" width="700" height="250" font-family="system-ui,-apple-system,Segoe UI,Roboto,sans-serif">
+  <style>
+    .t{font-size:13px;fill:#1f2328}.s{font-size:11px;fill:#59636e}.h{font-size:14px;font-weight:600;fill:#1f2328}
+    .r{font-size:12px;fill:#cf222e;font-weight:600}.g{font-size:12px;fill:#1a7f37;font-weight:600}
+    .box{fill:#fff;stroke:#8c959f;stroke-width:1.4;rx:6}
+    .dead{fill:#fff5f5;stroke:#cf222e;stroke-width:1.6;stroke-dasharray:5 3;rx:6}
+    .ok{fill:#f6fdf6;stroke:#1a7f37;stroke-width:1.6;rx:6}
+    .ln{stroke:#59636e;stroke-width:1.4;fill:none;marker-end:url(#a)}
+    .bad{stroke:#cf222e;stroke-width:1.6;stroke-dasharray:5 3;fill:none;marker-end:url(#b)}
+  </style>
+  <defs>
+    <marker id="a" markerWidth="9" markerHeight="9" refX="8" refY="4.5" orient="auto"><path d="M0,0 L9,4.5 L0,9 z" fill="#59636e"/></marker>
+    <marker id="b" markerWidth="9" markerHeight="9" refX="8" refY="4.5" orient="auto"><path d="M0,0 L9,4.5 L0,9 z" fill="#cf222e"/></marker>
+  </defs>
+  <text class="h" x="16" y="24">D-4 · 인증서 체인과 SAN 제약</text>
+  <rect class="ok" x="30" y="46" width="300" height="104"/>
+  <text class="t" x="180" y="68" text-anchor="middle">체인 4단계 · Verify return code: 0</text>
+  <text class="s" x="180" y="90" text-anchor="middle">0  CN=auth.hyeonworks.com</text>
+  <text class="s" x="180" y="106" text-anchor="middle">1  Let's Encrypt YE2</text>
+  <text class="s" x="180" y="122" text-anchor="middle">2  ISRG Root YE</text>
+  <text class="s" x="180" y="138" text-anchor="middle">3  ISRG Root X2</text>
+  <rect class="box" x="360" y="46" width="310" height="104"/>
+  <text class="t" x="515" y="68" text-anchor="middle">SAN 3개 · 와일드카드 아님</text>
+  <text class="s" x="515" y="90" text-anchor="middle">auth · app1 · app2</text>
+  <text class="r" x="515" y="114" text-anchor="middle">네 번째 이름이 없다</text>
+  <text class="s" x="515" y="134" text-anchor="middle">B-7 에서 Grafana 의 app2 를 빌려야 했다</text>
+  <rect class="box" x="30" y="168" width="640" height="60"/>
+  <text class="t" x="350" y="190" text-anchor="middle">단계가 1개면 cert.pem, 2개 이상이면 fullchain.pem 이다</text>
+  <text class="s" x="350" y="212" text-anchor="middle">브라우저는 중간 인증서를 캐시하므로 cert.pem 실수는 캐시 없는 클라이언트에서만 드러난다</text>
+</svg>
@@ -0,0 +1,94 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 860 520" font-family="-apple-system,BlinkMacSystemFont,'Segoe UI',Helvetica,sans-serif">
+<style>
+.box{fill:#fff;stroke:#8c959f;stroke-width:1.4;rx:6}
+.dead{fill:#fff5f5;stroke:#cf222e;stroke-width:1.6;stroke-dasharray:5 3;rx:6}
+.ok{fill:#f6fdf6;stroke:#1a7f37;stroke-width:1.6;rx:6}
+.t{font-size:12px;fill:#1f2328}
+.tb{font-size:12.5px;fill:#1f2328;font-weight:600}
+.s{font-size:10.5px;fill:#656d76}
+.ttl{font-size:14px;fill:#1f2328;font-weight:600}
+.r{stroke:#cf222e;stroke-width:1.6;fill:none}
+.g{stroke:#1a7f37;stroke-width:1.6;fill:none}
+.k{stroke:#8c959f;stroke-width:1.3;fill:none}
+</style>
+<defs>
+<marker id="a" markerWidth="8" markerHeight="8" refX="7" refY="3" orient="auto"><path d="M0,0 L7,3 L0,6 z" fill="#8c959f"/></marker>
+<marker id="ar" markerWidth="8" markerHeight="8" refX="7" refY="3" orient="auto"><path d="M0,0 L7,3 L0,6 z" fill="#cf222e"/></marker>
+<marker id="ag" markerWidth="8" markerHeight="8" refX="7" refY="3" orient="auto"><path d="M0,0 L7,3 L0,6 z" fill="#1a7f37"/></marker>
+</defs>
+
+<text x="20" y="26" class="ttl">D-4 — 「갱신 성공」과 「새 인증서 서빙」 사이의 36분 39초</text>
+<text x="20" y="44" class="s">측정: 2026-09-04 · 일련번호 5초 간격 564표본 · 새 연결 0.2초 간격 8856건</text>
+
+<!-- 좌: 디스크 -->
+<rect x="20" y="70" width="250" height="196" class="box"/>
+<text x="34" y="92" class="tb">디스크 — certbot</text>
+<rect x="36" y="104" width="218" height="46" class="box"/>
+<text x="48" y="122" class="t">cert1.pem</text>
+<text x="48" y="138" class="s">09-03 10:47:40 · notAfter Dec 2</text>
+<rect x="36" y="158" width="218" height="46" class="ok"/>
+<text x="48" y="176" class="t">cert2.pem</text>
+<text x="48" y="192" class="s">09-04 17:22:13 · notAfter Dec 3</text>
+<text x="36" y="224" class="s">certbot renew --force-renewal</text>
+<text x="36" y="240" class="s">→ 성공. live/ 링크가 2번을 가리킨다</text>
+<text x="36" y="256" class="s">경로는 그대로, 내용만 바뀐다</text>
+
+<!-- 중: 끊긴 고리 -->
+<rect x="300" y="96" width="260" height="144" class="dead"/>
+<text x="316" y="118" class="tb">★ 잇는 것이 없다</text>
+<text x="316" y="140" class="t">1. ExecStartPost</text>
+<text x="470" y="140" class="t" fill="#cf222e">없음</text>
+<text x="316" y="160" class="t">2. renewal-hooks/deploy/</text>
+<text x="470" y="160" class="t" fill="#cf222e">비었음</text>
+<text x="316" y="180" class="t">3. certbot nginx 플러그인</text>
+<text x="470" y="180" class="t" fill="#cf222e">없음</text>
+<text x="316" y="206" class="s">post/ · pre/ 도 비어 있다 (total 8)</text>
+<text x="316" y="222" class="s">셋 다 비면 아무도 reload 를 부르지 않는다</text>
+<path d="M270 168 L296 168" class="r" marker-end="url(#ar)"/>
+<path d="M300 230 L560 108" stroke="#cf222e" stroke-width="1.2" stroke-dasharray="4 3"/>
+<path d="M300 108 L560 230" stroke="#cf222e" stroke-width="1.2" stroke-dasharray="4 3"/>
+
+<!-- 우: nginx -->
+<rect x="590" y="70" width="250" height="196" class="box"/>
+<text x="604" y="92" class="tb">nginx — 메모리</text>
+<rect x="606" y="104" width="218" height="60" class="dead"/>
+<text x="618" y="124" class="t">기동 시 읽은 cert1</text>
+<text x="618" y="140" class="s">master 585 / worker 586</text>
+<text x="618" y="156" class="s">둘 다 09-03 19:00:39, 22.4시간째</text>
+<text x="606" y="184" class="s">reload 없이는 디스크를 다시 안 본다.</text>
+<text x="606" y="200" class="s">reload 하면 마스터는 남고</text>
+<text x="606" y="216" class="s">워커만 새로 뜬다 → 워커 PID 로 확인</text>
+<text x="606" y="240" class="s">ssl_certificate .../fullchain.pem</text>
+<path d="M564 168 L586 168" class="k" marker-end="url(#a)"/>
+
+<!-- 타임라인 -->
+<text x="20" y="306" class="tb">밖에서 본 것 — 일련번호 (5초 간격)</text>
+<line x1="60" y1="356" x2="800" y2="356" class="k"/>
+<line x1="60" y1="350" x2="60" y2="362" class="k"/>
+<line x1="300" y1="350" x2="300" y2="362" class="k"/>
+<line x1="660" y1="344" x2="660" y2="368" stroke="#1a7f37" stroke-width="2"/>
+<line x1="800" y1="350" x2="800" y2="362" class="k"/>
+<text x="46" y="382" class="s">08:10:51</text>
+<text x="278" y="382" class="s">08:22:13</text>
+<text x="620" y="382" class="s">08:58:52</text>
+<text x="770" y="382" class="s">09:02</text>
+<text x="278" y="398" class="s">디스크 기록</text>
+<text x="618" y="398" class="s">nginx -s reload</text>
+
+<rect x="60" y="330" width="600" height="16" class="dead"/>
+<text x="300" y="342" class="s" text-anchor="middle" fill="#cf222e">0520BB…B853 (옛 인증서) — 이 구간에서 428회 관측</text>
+<rect x="660" y="330" width="140" height="16" class="ok"/>
+<text x="730" y="342" class="s" text-anchor="middle" fill="#1a7f37">06C7CB…EA1D</text>
+<path d="M300 416 L660 416" class="r" marker-end="url(#ar)"/>
+<path d="M660 416 L300 416" class="r" marker-end="url(#ar)"/>
+<text x="480" y="410" class="tb" text-anchor="middle" fill="#cf222e">36분 39초</text>
+<text x="480" y="434" class="s" text-anchor="middle">사람이 reload 했기에 36분이다. 아무도 안 했다면 다음 재시작까지 — 무기한</text>
+
+<!-- reload 판정 -->
+<rect x="20" y="452" width="400" height="52" class="ok"/>
+<text x="34" y="472" class="tb">reload 는 무중단이었다</text>
+<text x="34" y="490" class="s">새 연결 8856건 전부 200 · p95 205.7 → 204.3ms (변화 없음)</text>
+<rect x="440" y="452" width="400" height="52" class="ok"/>
+<text x="454" y="472" class="tb">진행 중이던 요청도 살아남았다</text>
+<text x="454" y="490" class="s">전송 12초째에 reload · 845361바이트 전량 · 연결수 1</text>
+</svg>
@@ -0,0 +1,57 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 760 470" width="760" height="470" font-family="system-ui,-apple-system,Segoe UI,Roboto,sans-serif">
+  <style>
+    .t{font-size:13px;fill:#1f2328}.s{font-size:11px;fill:#59636e}.h{font-size:14px;font-weight:600;fill:#1f2328}
+    .box{fill:#fff;stroke:#8c959f;stroke-width:1.4;rx:6}
+    .host{fill:#f6f8fa;stroke:#59636e;stroke-width:1.6;rx:8}
+    .node{fill:#fff;stroke:#0969da;stroke-width:1.6;rx:8}
+    .ln{stroke:#59636e;stroke-width:1.4;fill:none;marker-end:url(#a)}
+  </style>
+  <defs><marker id="a" markerWidth="9" markerHeight="9" refX="8" refY="4.5" orient="auto"><path d="M0,0 L9,4.5 L0,9 z" fill="#59636e"/></marker></defs>
+
+  <rect class="box" x="290" y="12" width="180" height="38"/>
+  <text class="t" x="380" y="30" text-anchor="middle">개발 노트북</text>
+  <text class="s" x="380" y="44" text-anchor="middle">브라우저 · kubectl · Playwright</text>
+  <path class="ln" d="M380,52 L380,80"/>
+  <text class="s" x="392" y="70">https · tailnet 100.x · split DNS</text>
+
+  <rect class="host" x="40" y="84" width="680" height="66"/>
+  <text class="h" x="56" y="106">test-server</text>
+  <text class="s" x="56" y="122">Arch Linux · 12GB · WiFi only · sudo 는 비밀번호 필요</text>
+  <rect class="box" x="430" y="94" width="270" height="46"/>
+  <text class="t" x="565" y="112" text-anchor="middle">nginx :443 — TLS 종료</text>
+  <text class="s" x="565" y="128" text-anchor="middle">auth / app1 / app2 (SAN 3개, 와일드카드 아님)</text>
+
+  <path class="ln" d="M240,152 L200,186"/><path class="ln" d="M520,152 L560,186"/>
+  <text class="s" x="330" y="172" text-anchor="middle">http · libvirt NAT (virbr0)</text>
+
+  <rect class="node" x="40" y="190" width="320" height="250"/>
+  <text class="h" x="56" y="212">kc-lab-1 · 5120MB</text>
+  <text class="s" x="56" y="228">k3s server · 10.42.0.0/24</text>
+  <rect class="box" x="56" y="238" width="130" height="26"/><text class="t" x="121" y="255" text-anchor="middle">traefik ×1</text>
+  <rect class="box" x="196" y="238" width="148" height="26"/><text class="t" x="270" y="255" text-anchor="middle">coredns</text>
+  <rect class="box" x="56" y="272" width="130" height="26"/><text class="t" x="121" y="289" text-anchor="middle">keycloak-1</text>
+  <rect class="box" x="196" y="272" width="148" height="26"/><text class="t" x="270" y="289" text-anchor="middle">bff (1/2)</text>
+  <rect class="box" x="56" y="306" width="288" height="26"/><text class="t" x="200" y="323" text-anchor="middle">oauth2-proxy (1/2)</text>
+  <rect class="box" x="56" y="340" width="288" height="46"/>
+  <text class="t" x="200" y="358" text-anchor="middle">prometheus (PVC) · grafana</text>
+  <text class="s" x="200" y="374" text-anchor="middle">관측 스택은 여기 고정 — 죽이지 않는다</text>
+
+  <rect class="node" x="400" y="190" width="320" height="250"/>
+  <text class="h" x="416" y="212">kc-lab-2 · 4096MB</text>
+  <text class="s" x="416" y="228">k3s agent · 10.42.1.0/24</text>
+  <rect class="box" x="416" y="238" width="288" height="26"/><text class="t" x="560" y="255" text-anchor="middle">keycloak-0</text>
+  <rect class="box" x="416" y="272" width="140" height="26"/><text class="t" x="486" y="289" text-anchor="middle">bff (2/2)</text>
+  <rect class="box" x="566" y="272" width="138" height="26"/><text class="t" x="635" y="289" text-anchor="middle">oauth2-proxy</text>
+  <rect class="box" x="416" y="306" width="140" height="46"/>
+  <text class="t" x="486" y="324" text-anchor="middle">postgres</text><text class="s" x="486" y="340" text-anchor="middle">PVC (노드 고정)</text>
+  <rect class="box" x="566" y="306" width="138" height="46"/>
+  <text class="t" x="635" y="324" text-anchor="middle">redis</text><text class="s" x="635" y="340" text-anchor="middle">PVC + AOF</text>
+  <text class="s" x="560" y="374" text-anchor="middle">장애 주입은 여기</text>
+
+  <path d="M360,290 L400,290" stroke="#0969da" stroke-width="1.6" fill="none" marker-end="url(#a)"/>
+  <path d="M400,300 L360,300" stroke="#0969da" stroke-width="1.6" fill="none" marker-end="url(#a)"/>
+  <text class="s" x="380" y="284" text-anchor="middle">7800</text>
+  <text class="s" x="380" y="318" text-anchor="middle">JGroups</text>
+
+  <text class="s" x="40" y="460">A-0 에서 확인: 세션은 이 7800 이 아니라 postgres 를 통해 공유된다</text>
+</svg>
@@ -0,0 +1,9 @@
+=== A-3 이 가정만 하고 재지 않은 값 ===
+          name          | setting | unit | source  
+------------------------+---------+------+---------
+ commit_delay           | 0       |      | default
+ synchronous_commit     | on      |      | default
+ wal_writer_delay       | 200     | ms   | default
+ wal_writer_flush_after | 128     | 8kB  | default
+(4 rows)
+
@@ -0,0 +1,19 @@
+# 주의 — 이 파일은 원 실험 시점에 0바이트로 저장됐다.
+# 리다이렉션이 stdout 만 받았는데 출력이 stderr 로 갔거나 tee 앞 파이프가
+# 비어 있었던 것으로 보인다. README 는 그 사이 파일 내용을 서술하고 있었는데,
+# 그것은 화면에서 본 것을 적은 것이지 이 파일에서 온 것이 아니었다.
+#
+# 아래는 사후에 다시 수집한 것이며, 원 시점의 DROP 규칙(0 패킷)은 이미
+# 제거되어 재현되지 않는다. 구조적 사실(kube-router 가 자기 체인을 FORWARD
+# 최상단에 유지한다)만 확인할 수 있다.
+# 원 실험의 결정적 증거는 04-correct-direction.txt 의 패킷 카운터 19/21 이다.
+
+=== A-5 재수집 — filter 테이블 규칙이 CNI 체인에 밀리는 것 ===
+Chain FORWARD (policy ACCEPT 0 packets, 0 bytes)
+num   pkts bytes target     prot opt in     out     source               destination         
+1     1690 3386K KUBE-ROUTER-FORWARD  0    --  *      *       0.0.0.0/0            0.0.0.0/0            /* kube-router netpol - TEMCG2JMHZYE7H7T */
+2        7   612 KUBE-PROXY-FIREWALL  0    --  *      *       0.0.0.0/0            0.0.0.0/0            ctstate NEW /* kubernetes load balancer firewall */
+3       40 13196 KUBE-FORWARD  0    --  *      *       0.0.0.0/0            0.0.0.0/0            /* kubernetes forwarding rules */
+
+  (원 실험 시점의 규칙은 이미 제거됐다. 아래는 kube-router 가 자기 체인을
+   FORWARD 최상단에 유지한다는 구조적 사실만 보여준다 — 그것이 실패 원인이었다.)
@@ -16,3 +16,10 @@
 1. **세션은 옮겨졌고 토큰은 안 옮겨졌다.** 빈 81개가 늘었는데 authorized client 관련은 하나도 안 바뀌었다.
 2. **refresh token 은 Redis 에 평문으로 있는 게 아니라 아예 없다.** 암호화를 고민하기 전에 이걸 알아야 한다.
 3. **"로그인은 되어 있는데 아무것도 못 하는" 상태가 만들어진다** — 완전 로그아웃보다 나쁘다.
+
+## 스크린샷 주의
+
+`b1-login-works-two-replicas.png` 과 `b1-token-boundary-after-redis.png` 는
+**동일 파일**이며 `b2-before-relogin.png` 와도 같다 (md5 `6de826a7…`).
+세 시점 모두 `accessTokenStoredOnServer: false` 인 같은 화면이었다.
+**시점 구별은 터미널 출력과 Redis/DB 조회가 한다.**
@@ -19,3 +19,14 @@
 2. **refresh token 은 평문이다.** DB 읽기 권한이면 작동하는 토큰을 얻는다.
 3. **같은 사용자의 두 번째 로그인이 첫 번째를 덮어쓴다.** 기본키에 session id 가 없어 구조적으로 그렇다.
 4. **로그아웃은 셋 중 하나만 지운다.** 평문 토큰과 Keycloak SSO 세션이 남는다.
+
+## 스크린샷 주의
+
+`b2-tokens-shared-across-instances.png` 는 **B-0 의
+`b0-bff-token-boundary.png` 와 동일 파일**이다 (md5 `9ed00537…`).
+두 시점 모두 `accessTokenStoredOnServer: true` 인 같은 화면이라 바이트가 같다.
+
+**그래서 이 png 는 "JDBC 전환으로 토큰이 공유된다" 를 단독으로 증명하지
+못한다.** 그 증명은 `01-jdbc-store-deploy.txt`(테이블 생성)과
+`03-plaintext-tokens.txt`(행에 토큰이 들어 있음)가 한다.
+`b2-before-relogin.png` 는 B-1 의 캡처와 동일 파일이다.
@@ -0,0 +1,11 @@
+=== 깨끗한 상태로 초기화 ===
+DELETE 1
+
+=== 기준선 ===
+  Keycloak 온라인 세션: 4
+  Redis 키: 0
+
+=== 두 앱의 구조 ===
+  app1.hyeonworks.com  →  BFF        (서버 세션: Redis + PostgreSQL)
+  app2.hyeonworks.com  →  oauth2-proxy (쿠키 티켓 + Redis)
+  둘 다 realm keycloak-patterns 를 쓴다
@@ -0,0 +1,9 @@
+=== app1 로그인 직후 Keycloak 세션 ===
+     user_session_id      | client_sessions 
+--------------------------+-----------------
+ oqOjHekin4JU-BZjgQLjUByW |               1
+(1 row)
+
+  Redis 키: 1
+    bff:session:sessions:6e0d9af4-2c8f-47d2-bf83-8b1e9670c679
+  PostgreSQL authorized client: 1 행
@@ -0,0 +1,20 @@
+=== app2 방문 후 — 로그인 화면 없이 통과했는가 ===
+     user_session_id      | client_sessions 
+--------------------------+-----------------
+ oqOjHekin4JU-BZjgQLjUByW |               2
+(1 row)
+
+
+=== 어느 클라이언트가 붙었는가 ===
+              client_id               |       name       
+--------------------------------------+------------------
+ 9055fa46-6abb-4d6d-a339-8a9183bbf26d | bff-confidential
+ 80431dbc-af81-4673-9790-ad06d1570b2e | oauth2-proxy
+(2 rows)
+
+
+=== 저장소 상태 ===
+  Redis 키:
+    _oauth2_proxy-6b028a70f69c8f0da9966eb36972dff2
+    bff:session:sessions:6e0d9af4-2c8f-47d2-bf83-8b1e9670c679
+  PostgreSQL authorized client: 1 행
@@ -0,0 +1,25 @@
+=== ★ Keycloak 의 SSO 세션 하나를 죽인다 ===
+  남은 Keycloak 세션: 1
+
+=== 두 앱의 애플리케이션 세션은 그대로인가 ===
+  _oauth2_proxy-6b028a70f69c8f0da9966eb36972dff2
+  bff:session:sessions:6e0d9af4-2c8f-47d2-bf83-8b1e9670c679
+  PostgreSQL authorized client: 1 행
+
+  → IdP 세션은 없어졌는데 앱 세션은 남아 있다면, 두 계층의 수명이 어긋난 것이다
+=== 사용자 단위 로그아웃 (IdP 세션만 끊는다) ===
+  남은 Keycloak 세션: 1
+
+=== 앱 세션은 남아 있는가 ===
+  _oauth2_proxy-6b028a70f69c8f0da9966eb36972dff2
+  bff:session:sessions:6e0d9af4-2c8f-47d2-bf83-8b1e9670c679
+  PostgreSQL authorized client: 1 행
+=== 남은 세션의 realm 과 client ===
+     user_session_id      | realm  | clients 
+--------------------------+--------+---------
+ E1q5xI7tt4U_WhZpW7rEPIF2 | master |       1
+(1 row)
+
+
+=== 브라우저에서 두 앱을 다시 열면 어떻게 되는가 ===
+  (IdP 세션이 사라졌으면 재로그인이 필요해야 한다)
@@ -0,0 +1,27 @@
+# C-1 — 다중 앱 SSO 증거
+
+2026-09-04 16:15–16:30 KST
+해설: [`docs/experiment-c1-multi-app-sso.md`](../../experiment-c1-multi-app-sso.md)
+
+| 파일 | 무엇을 보여주는가 |
+|---|---|
+| `01-baseline.txt` | 초기화 시도 — `logout-all` 이 안 먹어 세션 4개가 남았다 |
+| `02-after-app1-login.txt` | app1 로그인 후 — user session 1 · client session 1 · Redis 1 · DB 1행 |
+| `03-after-app2-visit.txt` | **app2 방문 후 client session 1 → 2**, `bff-confidential` 과 `oauth2-proxy` 가 같은 user session 에 붙음. Redis 에 두 종류 세션 |
+| `04-sso-session-killed.txt` | IdP 세션 삭제 후 — **앱 세션 셋 다 남아 있다**. realm 을 join 해 보고서야 남은 것이 master 세션임을 확인 |
+| `c1-sso-app2-no-login-screen.png` | app2 가 로그인 화면 없이 열린 화면 |
+| `c1-apps-alive-after-idp-logout.png` | **IdP 세션을 죽인 뒤에도 그대로 열리는 화면** |
+
+## 핵심 세 줄
+
+1. **SSO 는 user session 1개에 client session N개** 구조다 — A-3(전체 소실)과 B-3(client 만 제거)의 차이가 여기서 의미를 갖는다.
+2. **IdP 세션을 죽여도 두 앱은 계속 동작한다.** 세 층(IdP·앱·토큰)의 수명이 각자이기 때문이다.
+3. **IdP 는 "로그인 경로"의 단일 장애점이지 "이미 로그인한 사용자"의 단일 장애점이 아니다.** 장애는 앱 세션 수명만큼 지연되어 몰려온다.
+
+## 스크린샷 주의
+
+`c1-sso-app2-no-login-screen.png` 과 `c1-apps-alive-after-idp-logout.png` 는
+**바이트 단위로 동일한 파일**이다 (md5 `2c703176…`). 두 시점의 화면이 실제로
+같은 내용이었기 때문이며, 조작이 아니다. **다만 그래서 두 시점을 구별하는
+증거가 되지 못한다** — 구별은 `03-` 과 `04-` 의 터미널 출력(client_sessions
+1→2, 그리고 IdP 세션 삭제 후 Redis 키 잔존)이 한다.
@@ -0,0 +1,12 @@
+=== 현재 클라이언트의 백채널 로그아웃 설정 ===
+--- bff-confidential ---
+    "frontchannelLogout" : false,
+--- oauth2-proxy ---
+    "frontchannelLogout" : false,
+
+=== BFF 가 백채널 로그아웃 엔드포인트를 갖고 있는가 ===
+
+=== 실제로 그 경로가 있는가 ===
+  /logout/connect/back-channel/keycloak      HTTP 302
+  /backchannel-logout                        HTTP 302
+  /oauth2/sign_out                           HTTP 302
@@ -0,0 +1,8 @@
+=== IdP 쪽에만 백채널 로그아웃 URL 을 설정한다 ===
+  client id: 9055fa46-6abb-4d6d-a339-8a9183bbf26d
+command terminated with exit code 1
+
+=== 로그인 상태를 만든다 ===
+  (브라우저에 이미 세션이 있다)
+  Keycloak 세션: 2
+  Redis: 2 키
@@ -0,0 +1,28 @@
+=== 로그아웃 전 상태 ===
+  Redis: 2 키
+  keycloak-patterns 세션: 0
+
+=== ★ IdP 로그아웃 — Keycloak 이 백채널 알림을 보낼 것이다 ===
+  시각: 14:53:29
+
+=== Keycloak 로그 — 백채널 요청을 보냈는가, 결과는 ===
+
+=== BFF 로그 — 백채널 요청이 도착했는가 ===
+
+=== 앱 세션이 정리되었는가 ===
+  Redis: 2 키
+    _oauth2_proxy-6b028a70f69c8f0da9966eb36972dff2
+    bff:session:sessions:6e0d9af4-2c8f-47d2-bf83-8b1e9670c679
+=== 로그아웃 전 — 실제 세션이 있는가 ===
+  keycloak-patterns 세션: 1
+  Redis: 1 키
+
+=== ★ IdP 로그아웃 → 백채널 알림 ===
+  시각: 14:54:21
+
+=== Keycloak 로그 ===
+
+=== BFF 로그 — 요청이 왔는가 ===
+
+=== 앱 세션 ===
+  Redis: 1 키
@@ -0,0 +1,15 @@
+=== IdP 세션은 실제로 끊겼는가 ===
+  keycloak-patterns 세션: 0
+
+=== ★ Keycloak 파드가 app1.hyeonworks.com 에 닿는가 ===
+  DNS 해석:
+    Address: 100.83.212.4
+    
+    Non-authoritative answer:
+    
+  HTTPS 도달:
+    HTTP 200  (0 이면 못 닿음)
+
+=== Keycloak 로그 전체에서 backchannel 흔적 ===
+  keycloak-0: 0 줄
+  keycloak-1: 0 줄
@@ -0,0 +1,17 @@
+# C-2 — 백채널 로그아웃 증거
+
+2026-09-04 16:30–16:55 KST
+해설: [`docs/experiment-c2-backchannel-logout.md`](../../experiment-c2-backchannel-logout.md)
+
+| 파일 | 무엇을 보여주는가 |
+|---|---|
+| `01-current-state.txt` | 두 클라이언트 모두 `backchannelLogoutUrl` 없음 · BFF 소스에 `oidcLogout` 없음 · 후보 경로 셋 다 **302**(핸들러 없음) |
+| `02-configure-idp.txt` | IdP 쪽에만 `backchannel.logout.url` 설정 (점 표기는 실패, JSON 으로 성공) |
+| `03-logout-attempt.txt` | **살아 있는 세션(1)에 로그아웃 → IdP 세션 0, Redis 세션은 1 그대로.** Keycloak·BFF 로그에 흔적 없음 |
+| `04-reachability.txt` | **Keycloak 파드가 `app1.hyeonworks.com` 에 `HTTP 200` 으로 닿는다** — 네트워크 문제가 아님 |
+
+## 핵심 세 줄
+
+1. **백채널 로그아웃은 어느 쪽에도 구현되어 있지 않았다.** C-1 이 관측한 "전파 안 됨"의 원인이다.
+2. **IdP 쪽만 설정해도 소용없다.** 받을 엔드포인트와 `sid → 세션` 역인덱스가 앱에 있어야 한다.
+3. **도달성이 숨은 전제다.** 이 실험대는 닿지만, 앱이 사설망에 있으면 설정해도 조용히 실패한다.
@@ -0,0 +1,15 @@
+=== 백업 전 상태 ===
+  realms|clients|users|sessions|authclients = 2|15|2|3|1
+
+=== pg_dump — 전체 덤프 ===
+  시작: 14:59:30
+  완료: 14:59:30
+  크기: 394945 bytes  (6956 줄)
+  포함된 테이블 수: 101
+
+=== 덤프에 세션이 들어 있는가 ===
+  offline_user_session 언급: 13
+    COPY public.offline_user_session (user_session_id, user_id, realm_id, created_on, offline_flag, data, last_session_refre
+    E1q5xI7tt4U_WhZpW7rEPIF2	48b37d33-8419-49aa-9b5b-7731975be50c	7845f394-723a-4d07-b530-c7416b2e1d31	1788500836	0	{"ipAddr
+    2ap3DyRiBF8OdMiqCodsJ0mp	48b37d33-8419-49aa-9b5b-7731975be50c	7845f394-723a-4d07-b530-c7416b2e1d31	1788501029	0	{"ipAddr
+    Zsk4QcgXf_qgyMKzde5AG-Fz	48b37d33-8419-49aa-9b5b-7731975be50c	7845f394-723a-4d07-b530-c7416b2e1d31	1788501263	0	{"ipAddr
@@ -0,0 +1,17 @@
+=== ★ 파괴 — 스키마를 통째로 지운다 ===
+  시각: 14:59:47
+DROP SCHEMA
+CREATE SCHEMA
+  남은 테이블: 0
+
+=== 서비스 영향 ===
+  https://auth.hyeonworks.com/realms/master   HTTP 200
+  https://app1.hyeonworks.com/                HTTP 200
+bff-555df79c97-6j86w           1/1   Running   0     49m
+bff-555df79c97-vgg6g           1/1   Running   0     49m
+keycloak-0                     1/1   Running   0     4m15s
+keycloak-1                     1/1   Running   0     4m38s
+
+=== Keycloak 이 무엇을 말하는가 ===
+  2026-09-04 05:58:02,598 WARN  [org.keycloak.jgroups.protocol.KEYCLOAK_JDBC_PING2] (blocking-thread--p3-t2) Failed to fetch the cluster members from the database.: org.postgresql.ut
+  	at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2904)
@@ -0,0 +1,29 @@
+=== 무엇이 실제로 깨지는가 ===
+  /.well-known/openid-configuration      HTTP 500
+  /protocol/openid-connect/certs         HTTP 200
+  토큰 발급 (DB 쓰기 필요)       HTTP 400
+
+=== ★ 복구 — 덤프에서 되돌린다 ===
+  시작: 15:00:12
+  완료: 15:00:13
+  오류 줄: 0
+
+=== 복구 후 데이터 ===
+  realms|clients|users|sessions|authclients = 2|15|2|3|1
+=== 복구 직후 — 재시작 없이 되는가 ===
+  +15초  well-known=200  토큰발급=200
+  → 재시작 없이 회복
+
+=== 복구 전 세션이 살아났는가 ===
+     user_session_id      |       realm       
+--------------------------+-------------------
+ E1q5xI7tt4U_WhZpW7rEPIF2 | master
+ 2ap3DyRiBF8OdMiqCodsJ0mp | master
+ Zsk4QcgXf_qgyMKzde5AG-Fz | master
+ vsDgCVo12-qX0CC63ZmYzbYF | keycloak-patterns
+(4 rows)
+
+
+=== 파드 재시작 횟수 ===
+  keycloak-0 restarts=0
+  keycloak-1 restarts=0
@@ -0,0 +1,16 @@
+# D-1 — 백업·복구 리허설 증거
+
+2026-09-04 16:55–17:05 KST
+해설: [`docs/experiment-d1-backup-restore.md`](../../experiment-d1-backup-restore.md)
+
+| 파일 | 무엇을 보여주는가 |
+|---|---|
+| `01-backup.txt` | `pg_dump --clean --if-exists` — 395KB · 101 테이블 · **세션 데이터 포함** |
+| `02-destruction.txt` | `DROP SCHEMA public CASCADE` → 테이블 0개. **그런데 외부는 `HTTP 200`** — Keycloak 이 realm 캐시로 서빙한다 |
+| `03-restore.txt` | 깨지는 것과 안 깨지는 것(`certs` 200 / `well-known` 500 / 토큰 400) · **복구 1초 · 오류 0건 · 데이터 완전 일치 · 재시작 0회** |
+
+## 핵심 세 줄
+
+1. **데이터베이스를 통째로 비웠는데 서비스가 200 을 냈다.** 헬스체크는 "DB 가 살아 있다"만 보고 "데이터가 있다"는 안 본다.
+2. **복구는 1초, 오류 0건, 재시작 불필요.** 절차가 맞다는 것은 확인됐다.
+3. **RPO 는 두 겹이다** — 백업 주기 + A-3 에서 측정한 `synchronous_commit OFF` 손실. 그리고 이번 덤프는 호스트의 `/tmp` 에 있어 **같은 장애 도메인**이다.
@@ -0,0 +1,9 @@
+=== D-1 의 교훈: 업그레이드 전에 백업한다 ===
+  백업: 396333 bytes
+
+=== 현재 버전과 스키마 상태 ===
+quay.io/keycloak/keycloak:26.7.0
+  총 마이그레이션 수: 210
+
+=== 로그인 상태 만들기 (업그레이드 후 살아남는지 볼 것) ===
+  현재 세션: 4
@@ -0,0 +1,17 @@
+=== ★ 롤백 시도: 26.7.0 → 26.0 ===
+  시각: 15:02:20
+statefulset.apps/keycloak image updated
+  +20초  keycloak-0:Running(1/1) keycloak-1:Running(0/1) 
+  +40초  keycloak-0:Running(1/1) keycloak-1:Running(0/1) 
+  +60초  keycloak-0:Running(1/1) keycloak-1:Running(0/1) 
+  +80초  keycloak-0:Running(1/1) keycloak-1:Error(0/1) 
+  +100초  keycloak-0:Running(1/1) keycloak-1:Running(0/1) 
+  +120초  keycloak-0:Running(1/1) keycloak-1:Error(0/1) 
+  +140초  keycloak-0:Running(1/1) keycloak-1:CrashLoopBackOff(0/1) 
+  +160초  keycloak-0:Running(1/1) keycloak-1:Running(0/1) 
+
+=== 새 파드가 무엇을 말하는가 ===
+2026-09-04 06:03:25,877 ERROR [org.keycloak.quarkus.runtime.cli.ExecutionExceptionHandler] (main) ERROR: Failed to start server in (production) mode
+2026-09-04 06:03:25,877 ERROR [org.keycloak.quarkus.runtime.cli.ExecutionExceptionHandler] (main) ERROR: liquibase.exception.ValidationFailedException: Validation Failed:
+2026-09-04 06:03:25,877 ERROR [org.keycloak.quarkus.runtime.cli.ExecutionExceptionHandler] (main) ERROR: Validation Failed:
+2026-09-04 06:03:25,877 ERROR [org.keycloak.quarkus.runtime.cli.ExecutionExceptionHandler] (main) For more details run the same command passing the '--verbose' option. Also you can use '--help' to see the detai
@@ -0,0 +1,20 @@
+=== 서비스는 살아 있는가 (StatefulSet 롤링이 막아줬다) ===
+  https://auth.hyeonworks.com/realms/master  HTTP 200
+Warning: v1 Endpoints is deprecated in v1.33+; use discovery.k8s.io/v1 EndpointSlice
+  ready 주소: [10.42.1.140]sed: -e expression #1, char 27: unknown option to 's'
+
+=== Liquibase 오류 상세 ===
+2026-09-04 06:03:25,877 ERROR [org.keycloak.quarkus.runtime.cli.ExecutionExceptionHandler] (main) ERROR: liquibase.exception.ValidationFailedException: Validation Failed:
+     1 changesets check sum
+2026-09-04 06:03:25,877 ERROR [org.keycloak.quarkus.runtime.cli.ExecutionExceptionHandler] (main) ERROR: Validation Failed:
+     1 changesets check sum
+
+=== ★ 앞으로 되돌린다 (26.7.0) ===
+statefulset.apps/keycloak image updated
+partitioned roll out complete: 2 new pods have been updated...
+keycloak-0                     1/1   Running   0     10m
+keycloak-1                     1/1   Running   0     28s
+
+=== 데이터는 무사한가 ===
+  realms|clients|migrations|sessions = 2|15|210|4
+  외부 진입점 HTTP 200
@@ -0,0 +1,17 @@
+# D-2 — 버전 업그레이드 증거
+
+2026-09-04 17:05–17:15 KST
+해설: [`docs/experiment-d2-version-upgrade.md`](../../experiment-d2-version-upgrade.md)
+
+| 파일 | 무엇을 보여주는가 |
+|---|---|
+| `01-pre-upgrade.txt` | 백업 396KB · 이미지 26.7.0 · **마이그레이션 210건** · 세션 4 |
+| `02-rollback-attempt.txt` | 26.0 으로 내리자 `Running(0/1) → Error → CrashLoopBackOff`. **`liquibase.exception.ValidationFailedException`** |
+| `d2-upgrade-window.png` | Grafana — 26.7.3 업그레이드 구간의 `cluster_size` 2→1→2 두 번과 파드별 `up` 시계열 교체 (후속 작업에서 촬영) |
+| `03-roll-forward.txt` | **서비스는 `HTTP 200` 유지**(ready 주소 1개) · 오류 원인 `1 changesets check sum` · 26.7.0 복귀 후 마이그레이션 210·세션 4 그대로 |
+
+## 핵심 세 줄
+
+1. **스키마가 바뀌었으면 롤백은 안 된다.** (26.7.0↔26.7.3 처럼 안 바뀌면 된다 — [`followup`](../followup/) 참조.) 체크섬이 안 맞아 Liquibase 가 기동 자체를 거부한다 — "모르는 변경"이 아니라 "아는 변경인데 정의가 다르다".
+2. **StatefulSet 이 사고를 절반에서 멈춰줬다.** 한 파드가 남아 외부 200 을 유지했다. replica 1 이었다면 전면 장애다.
+3. **실패한 기동은 스키마를 안 건드렸다.** 그래서 이미지만 되돌려도 복구됐다 — 이미 적용된 뒤였다면 DB 복구(D-1)가 필요하다.
@@ -0,0 +1,17 @@
+=== 실험대의 Secret 목록 ===
+  bff-secrets                Opaque       keys=1
+  keycloak-lab-secrets       Opaque       keys=2
+  oauth2-proxy-secrets       Opaque       keys=3
+
+=== ★ base64 는 암호화가 아니다 — 한 줄로 읽힌다 ===
+  keycloak-lab-secrets/POSTGRES_PASSWORD            = lab-postgres-change-me
+  keycloak-lab-secrets/KC_BOOTSTRAP_ADMIN_PASSWORD  = lab-admin-change-me
+  bff-secrets/KEYCLOAK_CLIENT_SECRET                = bff-lab-secret
+  oauth2-proxy-secrets/COOKIE_SECRET_A              = lab-cookie-secret-aaaaaaaaaaaaaa
+
+=== describe 는 값을 감춘다 (그래서 안전하다고 착각한다) ===
+  Type:  Opaque
+  
+  Data
+  ====
+  KEYCLOAK_CLIENT_SECRET:  14 bytes
@@ -0,0 +1,23 @@
+=== k3s 의 데이터 저장소 ===
+  Encryption Status: Disabled, no configuration file found
+
+=== 저장 파일 ===
+  total 23336
+  drwx------ 2 root root     4096 Sep  2 09:12 .
+  drwx------ 8 root root     4096 Sep  4 03:23 ..
+  -rw-r--r-- 1 root root 13078528 Sep  4 06:05 state.db
+  -rw-r--r-- 1 root root    32768 Sep  4 06:06 state.db-shm
+  -rw-r--r-- 1 root root 10769712 Sep  4 06:06 state.db-wal
+
+=== ★ 저장 파일에서 비밀번호가 그대로 보이는가 ===
+  state.db 안의 평문 일치: 2
+=== 평문이 저장 파일에 있다는 것을 눈으로 ===
+  client secret 평문 등장 횟수: 0
+
+=== 누가 Secret 을 읽을 수 있는가 ===
+  default SA: no
+  (Role 이 없으면 네임스페이스에 별도 제한이 없다는 뜻)
+
+=== 파드 안에서는 어떻게 보이는가 ===
+  KEYCLOAK_CLIENT_SECRET=bff-lab-secret
+  BFF_DB_PASSWORD=lab-postgres-change-me
@@ -0,0 +1,15 @@
+# D-3 — 비밀 관리 증거
+
+2026-09-04 17:15–17:25 KST
+해설: [`docs/experiment-d3-secret-management.md`](../../experiment-d3-secret-management.md)
+
+| 파일 | 무엇을 보여주는가 |
+|---|---|
+| `01-base64-not-encryption.txt` | 실험대의 **모든 비밀이 명령 네 줄로** 평문 출력. `describe` 는 `14 bytes` 만 보여줘 착각을 준다 |
+| `02-at-rest.txt` | **`Encryption Status: Disabled`** · `state.db` 안에 비밀번호 평문 **2회 일치** · 파드 안에서는 `KEYCLOAK_CLIENT_SECRET=bff-lab-secret` 환경변수 · `default` SA 는 **읽을 수 없음** |
+
+## 핵심 세 줄
+
+1. **base64 는 감추려는 것이 아니라 YAML 에 바이트를 담기 위한 것이다.** `describe` 가 값을 가려 안전하다는 착각을 준다.
+2. **저장소 암호화가 꺼져 있고 노드 디스크에 평문이 있다.** 노드 디스크 하나가 전 클러스터의 비밀이다.
+3. **네 경로 중 RBAC 만 제 역할을 한다.** 그것이 실질적 방어선이며, 관리자에게는 아무 방어가 없다.
@@ -0,0 +1,38 @@
+=== 현재 인증서 (외부 관측, sudo 불필요) ===
+subject=CN = auth.hyeonworks.com
+issuer=C = US, O = Let's Encrypt, CN = YE2
+notBefore=Sep  3 00:47:23 2026 GMT
+notAfter=Dec  2 00:47:22 2026 GMT
+X509v3 Subject Alternative Name:
+    DNS:app1.hyeonworks.com, DNS:app2.hyeonworks.com, DNS:auth.hyeonworks.com
+
+  → 세 호스트가 같은 인증서를 쓴다 (SAN 3개, 와일드카드 아님)
+
+=== 체인 완결성 (fullchain vs cert 실수 확인) ===
+ 0 s:CN = auth.hyeonworks.com
+ 1 s:C = US, O = Let's Encrypt, CN = YE2
+ 2 s:C = US, O = ISRG, CN = Root YE
+ 3 s:C = US, O = Internet Security Research Group, CN = ISRG Root X2
+Verify return code: 0 (ok)
+
+  → 중간 인증서가 함께 제공된다. fullchain.pem 이 올바로 설정되어 있다.
+
+=== 갱신 자동화 ===
+NEXT                            LEFT      LAST                         PASSED   UNIT
+Fri 2026-09-04 17:03:46 KST     1h 54min  Fri 2026-09-04 03:19:39 KST  11h ago  certbot-renew.timer
+타이머 enabled: enabled
+타이머 active: active
+
+=== 남은 기간 ===
+만료: Dec  2 00:47:22 2026 GMT
+남은 일수: 88일
+Let's Encrypt 90일 발급 · 30일 남으면 갱신 → 실제 갱신까지 약 58일
+
+=== 강제 갱신은 하지 못했다 ===
+$ sudo -n -l
+sudo: a password is required
+$ sudo -n systemctl reload nginx
+sudo: a password is required
+
+  → test-server 의 sudo 는 비밀번호를 요구한다 (게스트 kc-lab-1/2 는 무암호).
+    certbot renew --force-renewal 도 nginx reload 도 실행할 수 없다.
@@ -0,0 +1,19 @@
+D-4 대조군 — 주입 없는 상태의 가용성 잡음 바닥
+수집 시각(dev): 2026-09-04T08:03:07Z UTC
+대상: https://auth.hyeonworks.com/realms/master  ·  0.2초 간격 900회 = 180초
+형식: http_code time_total time_appconnect(TLS 핸드셰이크까지)
+왜: 갱신 중 000 이 한 번 나와도, 평시 오류율을 모르면 그게 갱신 탓인지 알 수 없다.
+----------------------------------------------------------------
+표본 900 개
+
+[상태코드 분포]
+      900 200
+
+[응답시간 ms]
+  최소 67  중앙 98  p95 195  최대 1121  평균 106.9
+
+[TLS 핸드셰이크 ms — 0 이면 연결 재사용, >0 이면 새 핸드셰이크]
+  핸드셰이크 발생 900회 / 900  평균 83 ms  최대 1100 ms
+
+[비정상 응답 원문 — 있으면 아래에 전부]
+  비200 총 0
@@ -0,0 +1,22 @@
+D-4 대조군 2 — '진행 중이던 요청' 측정 장치의 무주입 동작
+수집 시각(dev): 2026-09-04T08:08:45Z UTC
+
+왜 이 장치가 따로 필요한가
+  05-control 의 0.2초 폴링은 매 요청이 새 TCP 연결이다(핸드셰이크 900/900).
+  그래서 '새 연결을 받아주는가'는 재지만, D-4 가 묻는 '이미 진행 중이던
+  요청이 어떻게 되는가'는 재지 못한다. 재하려면 reload 순간에 실제로
+  전송 중인 요청이 있어야 한다.
+
+장치
+  845KB 짜리 관리 콘솔 번들을 --limit-rate 20k 로 내려받는다.
+  응답을 일부러 느리게 읽어 요청을 ~42초 동안 살아 있게 만든다.
+  대상: https://auth.hyeonworks.com/resources/55yjq/admin/keycloak.v2/assets/main-BbID33M6.js
+----------------------------------------------------------------
+[대조군: 주입 없이 1회]
+  코드=200  받은바이트=845361  총시간=41.392198s  연결수=1  실효속도=20423B/s
+  기대 크기 845361 / 실제 845361 bytes
+
+판정 기준 (주입 시 이 값들과 비교한다)
+  · 코드 200 + 크기 845361 = 진행 중이던 요청이 끝까지 살아남았다(graceful)
+  · 코드 000 또는 크기 부족  = reload 가 진행 중이던 연결을 끊었다
+  · 연결수 2 이상            = 중간에 끊겨 curl 이 다시 붙었다
@@ -0,0 +1,112 @@
+D-4 — 갱신은 되는데 nginx 가 집지 않는다: 배포 훅 부재
+=========================================================
+수집: 2026-09-04 17:2x KST · test-server (sudo 없이 읽을 수 있는 범위)
+
+발단
+----
+사용자가 `sudo certbot renew --force-renewal` 을 실행했다고 알려왔다.
+그런데 밖에서 본 인증서가 바뀌지 않았다.
+
+  serial=0520BB6416D569E26697B1691440F523B853
+  notBefore=Sep  3 00:47:23 2026 GMT     ← 어제 것 그대로
+  notAfter=Dec  2 00:47:22 2026 GMT
+
+일련번호 감시 161표본(약 13분) 동안 단 한 번도 바뀌지 않았다.
+
+[증거 1] nginx 는 reload 된 적이 없다
+--------------------------------------
+  $ ps -eo pid,ppid,etimes,lstart,args | grep nginx
+    585    1  80529  Thu Sep  3 19:00:39 2026  nginx: master process /usr/bin/nginx
+    586  585  80529  Thu Sep  3 19:00:39 2026  nginx: worker process
+
+읽는 법 — nginx 의 reload 는 마스터를 유지한 채 **워커만 새로 띄운다.**
+  · 마스터 585, 워커 586 = 마스터 기동 직후의 첫 fork
+  · 둘의 lstart 가 같고 etimes 도 같다(80529초 = 22.4시간)
+  → reload 가 한 번도 없었다. 22.4시간 전 기동 그대로다.
+
+인증서 파일이 새로 써졌더라도, nginx 는 기동 시점에 읽어 메모리에 들고 있다.
+reload 가 없으면 **옛 인증서를 계속 서빙한다.**
+
+[증거 2] ★ 갱신 유닛에 reload 가 없다
+--------------------------------------
+  $ systemctl cat certbot-renew.service
+  # /usr/lib/systemd/system/certbot-renew.service
+  [Unit]
+  Description=Renew certificates acquired via Certbot
+  [Service]
+  Type=oneshot
+  ExecStart=/usr/bin/certbot -q renew
+  PrivateTmp=true
+
+`ExecStart` 가 전부다. **ExecStartPost 도, --deploy-hook 도 없다.**
+배포판(Arch)이 넣어준 기본 유닛이 그렇다.
+
+  $ systemctl cat certbot-renew.timer
+  OnCalendar=*-*-* 00/12:00:00
+  RandomizedDelaySec=12h
+  Persistent=true
+
+[증거 3] 타이머는 정상 동작한다 — 그래서 더 위험하다
+------------------------------------------------------
+  $ systemctl status certbot-renew.service
+  Active: inactive (dead) since Fri 2026-09-04 17:04:11 KST
+  Process: 28452 ExecStart=/usr/bin/certbot -q renew (code=exited, status=0/SUCCESS)
+
+  $ journalctl -u certbot-renew.service --since today
+  Sep 04 03:19:39 Starting Renew certificates acquired via Certbot...
+  Sep 04 03:19:41 Finished Renew certificates acquired via Certbot.
+  Sep 04 17:04:09 Starting Renew certificates acquired via Certbot...
+  Sep 04 17:04:11 Finished Renew certificates acquired via Certbot.
+
+오늘 두 번 돌았고 두 번 다 status=0/SUCCESS 다. 만료까지 88일 남아 실제
+갱신은 하지 않았으므로 **아직은** 아무 문제가 없다.
+
+[증거 4] nginx 가 무엇을 물고 있나
+-----------------------------------
+  $ grep -rn ssl_certificate /etc/nginx/
+  /etc/nginx/sites-available/keycloak-lab:18: ssl_certificate     /etc/letsencrypt/live/auth.hyeonworks.com/fullchain.pem;
+  /etc/nginx/sites-available/keycloak-lab:19: ssl_certificate_key /etc/letsencrypt/live/auth.hyeonworks.com/privkey.pem;
+
+`live/` 는 심볼릭 링크다. certbot 이 갱신하면 링크가 새 `archive/` 파일을
+가리키도록 바뀐다 — **파일 경로는 그대로인데 내용이 바뀐다.** 그래서 nginx
+설정은 고칠 필요가 없고, 바로 그 때문에 "설정이 그대로니 괜찮다"고 착각하기 쉽다.
+필요한 것은 설정 변경이 아니라 **reload** 다.
+
+무엇을 확인하지 못했나
+----------------------
+`/etc/letsencrypt/renewal-hooks/deploy/` 에 스크립트가 있으면 유닛 파일과
+무관하게 실행된다. 이 디렉터리는 root 전용이라 읽지 못했다.
+
+  $ ls -laR /etc/letsencrypt/renewal-hooks/
+  ls: cannot access '/etc/letsencrypt/renewal-hooks/': Permission denied
+
+따라서 두 갈래가 남는다.
+  (a) 강제 갱신이 실패했다 → 파일도 안 바뀌었고 reload 도 없었다
+  (b) 강제 갱신이 성공했다 → 파일은 바뀌었는데 훅이 없어 reload 가 안 됐다
+
+(b) 라면 이 실험대에서 가장 값진 발견이다. **"갱신 성공"과 "새 인증서 서빙"이
+다른 사건**이라는 것을, 88일 뒤가 아니라 지금 잡은 것이기 때문이다.
+
+가리는 방법 — root 권한 한 번:
+  sudo certbot certificates            # notAfter 가 오늘+90일이면 (b)
+  sudo ls -la /etc/letsencrypt/archive/auth.hyeonworks.com/
+  sudo tail -60 /var/log/letsencrypt/letsencrypt.log
+
+곁다리로 확인한 것 — CT 로그로는 가릴 수 없다
+-----------------------------------------------
+발급 사실은 Certificate Transparency 에 남으므로 sudo 없이 확인할 수 있을 것
+같았다. 실제로 서빙 중인 인증서에는 SCT 가 2개 박혀 있다.
+
+  CT Precertificate SCTs:
+    Log ID: C2:31:7E:57:...:52:CD   Timestamp: Sep  3 01:45:53.183 2026 GMT
+    Log ID: 46:AF:86:3D:...:50:5F   Timestamp: Sep  3 01:45:53.352 2026 GMT
+
+그런데 crt.sh 는 이 이름을 모른다.
+
+  $ curl -s 'https://crt.sh/?q=auth.hyeonworks.com&output=json'
+  []                                            ← 0건
+  $ curl -s 'https://crt.sh/?q=hyeonworks.com&output=json'
+  13건, 최신 not_before=2026-08-11              ← auth 는 없다
+
+**인증서에 SCT 가 박혀 있다는 것과 crt.sh 가 그것을 색인했다는 것은 다르다.**
+관측 도구가 진실의 부분집합만 본다는, A-2 의 `up` 지표와 같은 종류의 함정이다.
@@ -0,0 +1,66 @@
+D-4 — in-flight 감시에서 나온 76건 실패: 서버 탓이 아니다
+============================================================
+수집: 2026-09-04 · dev 머신에서 실행한 감시 로그
+
+무엇이 보였나
+-------------
+42초짜리 in-flight 요청을 연달아 돌리는 감시에서, 91건 중 76건이 실패했다.
+
+  08:13:40 코드=200 바이트=845361 시간=41.041830 연결수=1
+  08:14:22 코드=200 바이트=845361 시간=42.338482 연결수=1
+  08:15:04 코드=000 바이트=0 시간=0.001148 연결수=0     ← 여기부터
+  08:15:04 코드=000 바이트=0 시간=0.001140 연결수=0
+  08:15:04 코드=000 바이트=0 시간=0.000055 연결수=0
+  ... (76건, 전부 08:15:04)
+  08:15:04 코드=200 바이트=845361 시간=42.236496 연결수=1   ← 곧바로 복귀
+  08:15:47 코드=200 바이트=845361 시간=42.327129 연결수=1
+
+이걸 "갱신 중 진행 중이던 요청이 끊겼다"로 읽으면 안 되는 이유
+----------------------------------------------------------------
+1. **같은 순간 폴링은 멀쩡했다.** 0.2초 간격 폴링의 08:15:00–08:15:20 구간
+   표본 49건이 전부 200이다. 같은 호스트, 같은 TLS, 같은 머신이다.
+
+     08:15:00.24 200 0.092491
+     08:15:01.15 200 0.099177
+     08:15:02.38 200 0.078729
+     ...  49건 / 비200 0건
+
+2. **연결수=0 이다.** curl 이 TCP 연결을 시도조차 못 했다는 뜻이다.
+   서버가 연결을 끊었다면 연결수는 1이고 바이트는 0보다 크다.
+
+3. **시간이 0.00005초다.** 50마이크로초. DNS 조회조차 이보다 오래 걸린다.
+   요청이 나가기 전에 로컬에서 실패했다.
+
+4. **76건이 1초 안에 몰렸다.** 실패가 즉시 반환되니 while 루프가 폭주한 것이다.
+   시간축에 퍼진 장애가 아니라 순간의 스파이크다.
+
+5. **재현되지 않는다.**
+     같은 URL 100회 연속 → 실패 0/100
+     DNS 해석 200회      → 실패 0/200
+     URL 유효성          → 코드=200 크기=845361, 콘솔이 참조하는 경로와 동일
+
+6. **nginx 는 그 시각에 아무 일도 하지 않았다.** 마스터·워커가 22.4시간째
+   같은 프로세스다(07 참조). reload 도 재시작도 없었다.
+
+결론
+----
+**로컬(dev 머신) 쪽 일시적 원인이며, 서버 가용성 사건이 아니다.**
+정확한 원인은 특정하지 못했다 — curl 을 `-s` 로 돌려 오류 메시지를 버렸고,
+종료 코드도 기록하지 않았기 때문이다.
+
+고친 것
+-------
+감시를 종료 코드까지 남기는 형태로 교체했다. 다음에 같은 일이 생기면
+curl 의 종료 코드(6=DNS, 7=connect, 35=TLS ...)로 원인이 바로 나온다.
+실패 시 1초 쉬게 해 루프 폭주도 막았다.
+
+  R=$(curl -s --limit-rate 20k -o /dev/null -w "..." "$URL" 2>/dev/null); E=$?
+  echo "$T $R curl종료=$E"
+  [ $E -ne 0 ] && sleep 1
+
+남기는 교훈
+-----------
+측정 장치가 실패했을 때 **왜 실패했는지 남기지 않으면, 그 실패를 대상 탓으로
+돌릴지 장치 탓으로 돌릴지 판단할 근거가 없다.** 여기서는 대조 폴링이 같은
+시각에 멀쩡했다는 사실 하나로 겨우 갈랐다. 대조군이 없었다면 이 76건은
+"갱신 중 대규모 요청 실패"라는 그럴듯한 오보가 됐을 것이다.
@@ -0,0 +1,564 @@
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+08:31:59 코드=200 바이트=845361 시간=41.837942 연결수=1 curl종료=0
+08:32:41 코드=200 바이트=845361 시간=42.318577 연결수=1 curl종료=0
+08:33:23 코드=200 바이트=845361 시간=42.336079 연결수=1 curl종료=0
+08:34:05 코드=200 바이트=845361 시간=42.328392 연결수=1 curl종료=0
+08:34:48 코드=200 바이트=845361 시간=41.839243 연결수=1 curl종료=0
+08:35:30 코드=200 바이트=845361 시간=42.339658 연결수=1 curl종료=0
+08:36:12 코드=200 바이트=845361 시간=42.330835 연결수=1 curl종료=0
+08:36:54 코드=200 바이트=845361 시간=41.844755 연결수=1 curl종료=0
+08:37:36 코드=200 바이트=845361 시간=41.442783 연결수=1 curl종료=0
+08:38:18 코드=200 바이트=845361 시간=42.334462 연결수=1 curl종료=0
+08:39:00 코드=200 바이트=845361 시간=42.331275 연결수=1 curl종료=0
+08:39:42 코드=200 바이트=845361 시간=41.243768 연결수=1 curl종료=0
+08:40:23 코드=200 바이트=845361 시간=41.837874 연결수=1 curl종료=0
+08:41:05 코드=200 바이트=845361 시간=42.336582 연결수=1 curl종료=0
+08:41:48 코드=200 바이트=845361 시간=42.327934 연결수=1 curl종료=0
+08:42:30 코드=200 바이트=845361 시간=42.333559 연결수=1 curl종료=0
+08:43:12 코드=200 바이트=845361 시간=41.841294 연결수=1 curl종료=0
+08:43:54 코드=200 바이트=845361 시간=42.329699 연결수=1 curl종료=0
+08:44:37 코드=200 바이트=845361 시간=41.845127 연결수=1 curl종료=0
+08:45:18 코드=200 바이트=845361 시간=42.040360 연결수=1 curl종료=0
+08:46:00 코드=200 바이트=845361 시간=41.845192 연결수=1 curl종료=0
+08:46:42 코드=200 바이트=845361 시간=42.327749 연결수=1 curl종료=0
+08:47:25 코드=200 바이트=845361 시간=41.837216 연결수=1 curl종료=0
+08:48:06 코드=200 바이트=845361 시간=42.329675 연결수=1 curl종료=0
+08:48:49 코드=200 바이트=845361 시간=42.036368 연결수=1 curl종료=0
+08:49:31 코드=200 바이트=845361 시간=42.341275 연결수=1 curl종료=0
+08:50:13 코드=200 바이트=845361 시간=42.332664 연결수=1 curl종료=0
+08:50:56 코드=200 바이트=845361 시간=42.334345 연결수=1 curl종료=0
+08:51:38 코드=200 바이트=845361 시간=41.837146 연결수=1 curl종료=0
+08:52:20 코드=200 바이트=845361 시간=42.328092 연결수=1 curl종료=0
+08:53:02 코드=200 바이트=845361 시간=42.344341 연결수=1 curl종료=0
+08:53:44 코드=200 바이트=845361 시간=42.332296 연결수=1 curl종료=0
+08:54:27 코드=200 바이트=845361 시간=41.839230 연결수=1 curl종료=0
+08:55:09 코드=200 바이트=845361 시간=42.336469 연결수=1 curl종료=0
+08:55:51 코드=200 바이트=845361 시간=42.336864 연결수=1 curl종료=0
+08:56:33 코드=200 바이트=845361 시간=42.043518 연결수=1 curl종료=0
+08:57:15 코드=200 바이트=845361 시간=42.340137 연결수=1 curl종료=0
+08:57:58 코드=200 바이트=845361 시간=42.335696 연결수=1 curl종료=0
+08:58:40 코드=200 바이트=845361 시간=40.840349 연결수=1 curl종료=0
+08:59:21 코드=200 바이트=845361 시간=42.340130 연결수=1 curl종료=0
+09:00:03 코드=200 바이트=845361 시간=41.841100 연결수=1 curl종료=0
@@ -0,0 +1,41 @@
+Saving debug log to /var/log/letsencrypt/letsencrypt.log
+
+- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+Found the following certs:
+  Certificate Name: auth.hyeonworks.com
+    Serial Number: 6c7cb6df1da8a6d7995d93c264bb9ecea1d
+    Key Type: ECDSA
+    Identifiers: auth.hyeonworks.com app1.hyeonworks.com app2.hyeonworks.com
+    Expiry Date: 2026-12-03 07:21:52+00:00 (VALID: 89 days)
+    Certificate Path: /etc/letsencrypt/live/auth.hyeonworks.com/fullchain.pem
+    Private Key Path: /etc/letsencrypt/live/auth.hyeonworks.com/privkey.pem
+- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+
+=== renewal-hooks ===
+/etc/letsencrypt/archive/auth.hyeonworks.com/:
+total 48
+drwxr-xr-x 2 root root 4096 2026-09-04 17:22:13.508658811 +0900 .
+drwx------ 3 root root 4096 2026-09-03 10:47:40.915270972 +0900 ..
+-rw-r--r-- 1 root root 1359 2026-09-03 10:47:40.915923507 +0900 cert1.pem
+-rw-r--r-- 1 root root 1359 2026-09-04 17:22:13.508494637 +0900 cert2.pem
+-rw-r--r-- 1 root root 3523 2026-09-03 10:47:40.916215769 +0900 chain1.pem
+-rw-r--r-- 1 root root 3523 2026-09-04 17:22:13.508658811 +0900 chain2.pem
+-rw-r--r-- 1 root root 4882 2026-09-03 10:47:40.916339551 +0900 fullchain1.pem
+-rw-r--r-- 1 root root 4882 2026-09-04 17:22:13.508821612 +0900 fullchain2.pem
+-rw------- 1 root root  241 2026-09-03 10:47:40.916079294 +0900 privkey1.pem
+-rw------- 1 root root  241 2026-09-04 17:22:13.507717972 +0900 privkey2.pem
+
+/etc/letsencrypt/renewal-hooks/deploy/:
+total 8
+drwxr-xr-x 2 root root 4096 2026-09-03 10:46:54.658474560 +0900 .
+drwxr-xr-x 5 root root 4096 2026-09-03 10:46:54.658520760 +0900 ..
+
+/etc/letsencrypt/renewal-hooks/post/:
+total 8
+drwxr-xr-x 2 root root 4096 2026-09-03 10:46:54.658505772 +0900 .
+drwxr-xr-x 5 root root 4096 2026-09-03 10:46:54.658520760 +0900 ..
+
+/etc/letsencrypt/renewal-hooks/pre/:
+total 8
+drwxr-xr-x 2 root root 4096 2026-09-03 10:46:54.658474560 +0900 .
+drwxr-xr-x 5 root root 4096 2026-09-03 10:46:54.658520760 +0900 ..
@@ -0,0 +1,99 @@
+D-4 판정 — 갱신은 성공했고, 36분 39초 동안 반영되지 않았다
+=============================================================
+수집: 2026-09-04 · 감시 08:10:51 ~ 09:02 UTC (KST-9)
+
+════ 답 1 — "갱신 실패"가 아니라 "갱신됐는데 안 집었다" ════
+
+07-renewal-hook-missing.txt 에서 두 갈래로 남겼던 것이 갈렸다.
+  (a) 강제 갱신이 실패했다
+  (b) 성공했는데 훅이 없어 reload 가 안 됐다
+                                        → ★ (b) 였다.
+
+디스크 (12-certbot-state.txt)
+  /etc/letsencrypt/archive/auth.hyeonworks.com/
+    cert1.pem      2026-09-03 10:47:40 KST   ← 처음 발급
+    cert2.pem      2026-09-04 17:22:13 KST   ← ★ 강제 갱신, 새로 써졌다
+    fullchain2.pem 2026-09-04 17:22:13 KST
+    privkey2.pem   2026-09-04 17:22:13 KST
+
+  Certificate Name: auth.hyeonworks.com
+    Serial Number: 6c7cb6df1da8a6d7995d93c264bb9ecea1d
+    Expiry Date: 2026-12-03 07:21:52+00:00 (VALID: 89 days)
+
+밖에서 본 것 (09-serial-timeline.txt, 5초 간격 564표본)
+  08:10:51 ~ 08:58:47   serial=0520BB...B853  notAfter=Dec  2   ← 옛 것
+  08:58:52              serial=06C7CB...EA1D  notAfter=Dec  3   ← 바뀐 순간
+
+  08:22:13 ~ 08:58:52 구간에서 옛 인증서로 관측된 횟수: 428회
+
+시간 계산
+  새 인증서 디스크 기록 : 08:22:13 UTC (= 17:22:13 KST, archive mtime)
+  실제 서빙 시작        : 08:58:52 UTC (= 17:58:52 KST, nginx -s reload)
+  ────────────────────────────────────────────
+  공백                  : 2199초 = 36분 39초
+
+그리고 이 36분은 **우연히 짧았을 뿐이다.** reload 를 시킨 것은 사람이지
+자동화가 아니다. 아무도 안 했다면 다음 nginx 재시작까지 — 즉 무기한 —
+옛 인증서를 계속 서빙했을 것이다.
+
+왜 아무도 reload 하지 않았나 — 원인 세 가지가 겹쳤다
+  1. certbot-renew.service 에 ExecStartPost 가 없다 (07 참조)
+  2. /etc/letsencrypt/renewal-hooks/{deploy,post,pre}/ 가 전부 비어 있다
+         deploy/  total 8   (. 과 .. 뿐)
+         post/    total 8
+         pre/     total 8
+  3. certbot 에 nginx 플러그인이 없다 — 그래서 certbot 이 스스로 못 고친다
+         Discovered plugins: dns-cloudflare, manual, null, standalone, webroot
+         (certbot 5.7.0)
+
+  ★ 세 경로 전부가 비어 있다. 하나라도 있었으면 자동으로 반영됐다.
+
+왜 이게 88일 동안 안 보이나
+  타이머는 정상이고 오늘도 두 번 status=0/SUCCESS 로 끝났다.
+  만료 30일 전(= 약 58일 뒤)까지는 certbot 이 갱신 자체를 하지 않으므로
+  "반영되지 않는다"는 결함이 발현할 기회가 없다. 발현하는 날 증상은
+  **인증서 만료** 이고, 그때 로그는 여전히 SUCCESS 라고 적혀 있을 것이다.
+
+════ 답 2 — reload 는 무중단이다 (측정됨) ════
+
+계획서의 질문: "nginx reload 중 진행 중이던 요청은 어떻게 되는가"
+
+[새 연결] 0.2초 폴링, 08:10:51 ~ 09:02
+  전체 표본 8856건 / 비200 **0건**
+
+  응답시간                     n      중앙     p95      최대
+  ─────────────────────────────────────────────────────────
+  장기 평시 08:20~08:50      5398   98.0ms  205.7ms  1942.9ms
+  reload 직전 2분56초         489  116.0ms  200.8ms   387.7ms
+  reload 직후 2분08초         342  132.5ms  204.3ms   475.0ms
+
+  p95 가 205.7 → 204.3 으로 사실상 동일하고, 최대값은 오히려 낮다.
+  10초 구간 중앙값은 reload 전후 모두 80~190ms 사이를 오간다(WiFi 잡음).
+  → **reload 로 인한 지연 증가는 관측되지 않았다.**
+
+[진행 중이던 요청] 845KB 를 20k/s 로 받아 42초간 살려 둔 요청
+  08:58:40 시작 · 소요 40.84초 → 08:59:21 종료
+  reload 는 08:58:52, 즉 **요청 시작 12초 뒤 전송 한가운데**였다
+
+  코드=200  바이트=845361(전량)  연결수=1  curl종료=0
+
+  · 바이트가 전량이다      → 잘리지 않았다
+  · 연결수가 1이다         → 중간에 끊겨 재연결한 것이 아니다
+  · 옛 인증서로 시작한 연결이 새 워커 전환을 관통해 끝까지 갔다
+
+  in-flight 전체 50건 중 종료코드≠0 은 0건.
+  (앞서 76건 실패는 로컬 아티팩트였다 — 08-inflight-artifact.txt)
+
+════ 세 줄 요약 ════
+
+1. **"갱신 성공"과 "새 인증서 서빙"은 다른 사건이다.** 36분 39초 동안
+   디스크에는 새 인증서가, 네트워크에는 옛 인증서가 있었다. 428번 관측했다.
+
+2. **reload 는 정말 무중단이었다.** 8856건 전부 200, p95 변화 없음,
+   전송 한가운데였던 42초짜리 요청이 845361바이트를 온전히 받았다.
+   D-4 문서가 "확인하지 않았으므로 그렇게 쓰면 안 된다"고 유보했던 명제가
+   이제 측정으로 뒷받침된다.
+
+3. **위험한 쪽은 reload 가 아니라 reload 를 부르는 사람이 없다는 것이다.**
+   훅 디렉터리 3개가 전부 비었고, 유닛에 ExecStartPost 가 없고,
+   nginx 플러그인도 없다. 그리고 그 상태로 타이머는 SUCCESS 를 찍는다.
@@ -0,0 +1,28 @@
+# D-4 — 인증서 갱신 증거
+
+2026-09-04 17:25 – 18:02 KST
+해설: [`docs/experiment-d4-certificate-renewal.md`](../../experiment-d4-certificate-renewal.md)
+
+| 파일 | 무엇을 보여주는가 |
+|---|---|
+| `01-certificate-state.txt` | SAN 3개(와일드카드 아님) · **체인 4단계, `Verify return code: 0`** · `certbot-renew.timer` enabled·active, 11시간 전 실행 · 88일 남음 · **`sudo: a password is required` 로 강제 갱신 불가** |
+| `05-control-no-injection.txt` | **대조군 1 — 잡음 바닥.** 0.2초 × 900회 / 180초 동안 **900전부 200, 오류 0**. 중앙 98ms · p95 195ms. **TLS 핸드셰이크 900/900** = 매 요청이 새 연결이다 |
+| `06-inflight-control.txt` | **대조군 2 — '진행 중이던 요청' 측정 장치.** 845KB 번들을 `--limit-rate 20k` 로 받아 요청을 **42초간 살려 둔다.** 무주입 시 코드 200 · 845361바이트 · 연결수 1 |
+
+| `05-control-no-injection.txt` | **대조군 1 — 잡음 바닥.** 0.2초 × 900회 / 180초 동안 **900 전부 200, 오류 0**. 중앙 98ms · p95 195ms. **TLS 핸드셰이크 900/900** = 매 요청이 새 연결 |
+| `06-inflight-control.txt` | **대조군 2 — '진행 중이던 요청' 장치.** 845KB 를 `--limit-rate 20k` 로 받아 요청을 **42초간 살려 둔다.** 무주입 시 200 · 845361바이트 · 연결수 1 |
+| `07-renewal-hook-missing.txt` | **nginx 는 reload 된 적이 없다** — 마스터 585·워커 586 이 같은 시각 기동, 22.4시간째. 유닛은 `ExecStart=certbot -q renew` 가 전부. crt.sh 는 SCT 가 박힌 인증서를 0건으로 답한다 |
+| `08-inflight-artifact.txt` | **76건 실패는 서버 탓이 아니다** — 같은 순간 폴링 49건 전부 200, `연결수=0`, 50µs, 재현 0/100. 대조군이 오보를 막았다 |
+| `09-serial-timeline.txt` | **일련번호 564표본.** `08:10:51 ~ 08:58:47` 옛 것 → **`08:58:52` 새 것** |
+| `10-reload-poll-window.txt` | reload 전후 60초 새 연결 원문 — **비200 0건**, 최대 373ms |
+| `11-inflight-full.txt` | in-flight 전체 50건. **08:58:40 시작 요청이 08:58:52 reload 를 관통**해 845361바이트 전량 수신 |
+| `12-certbot-state.txt` | `cert2.pem` **09-04 17:22:13 기록됨** · `renewal-hooks/{deploy,post,pre}/` **셋 다 비었음** · 플러그인 목록에 nginx 없음 |
+| `13-verdict.txt` | **판정 전문** — 36분 39초 공백(428회 관측) + reload 무중단(8856건 0실패) |
+
+## 핵심 다섯 줄
+
+1. **「갱신 성공」과 「새 인증서 서빙」은 다른 사건이다.** 새 인증서가 디스크에 있는 채로 **36분 39초** 동안 옛 인증서를 서빙했고, 그 구간에서 **428번** 관측했다.
+2. **그 36분은 우연히 짧았다.** reload 를 시킨 것은 사람이다. 아무도 안 했다면 다음 nginx 재시작까지 무기한이었다.
+3. **원인이 셋 겹쳤다.** 유닛에 `ExecStartPost` 없음 · 훅 디렉터리 3개 전부 비었음 · certbot 에 nginx 플러그인 없음. 하나라도 있었으면 자동 반영됐다.
+4. **reload 자체는 무중단이었다.** 새 연결 8856건 전부 200, p95 205.7 → 204.3ms, 그리고 **전송 12초째에 reload 를 맞은 42초 요청이 845361바이트를 온전히** 받았다(연결수 1).
+5. **이 결함은 88일 동안 안 보인다.** 타이머는 오늘도 두 번 `SUCCESS` 로 끝났다. 만료 30일 전까지는 갱신 자체를 하지 않으므로 발현할 기회가 없고, 발현하는 날의 증상은 **인증서 만료**다 — 그날에도 로그는 `SUCCESS` 라고 적혀 있다.
@@ -0,0 +1,32 @@
+=== D-1 절차대로 먼저 백업 ===
+  백업: 395375 bytes
+  마이그레이션 전: 210
+  세션 전: 3
+
+=== ★ 정방향 업그레이드 + 1초 간격 가용성 측정 ===
+  시작: 15:22:59
+partitioned roll out complete: 2 new pods have been updated...
+  완료: 15:24:26
+
+=== 업그레이드 중 외부 응답 시계열 ===
+  200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 
+  200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 
+  200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 
+  200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 
+  200 200 200 200 200 200 200 
+  200 응답: 87 회
+  비200   : 0
+0 회
+=== 업그레이드 후 ===
+quay.io/keycloak/keycloak:26.7.3
+  Keycloak 26.7.3
+  마이그레이션 후: 210  (전: 210)
+  세션 후:        3  (전: 3)
+
+=== 스키마 마이그레이션이 실제로 있었는가 ===
+  (없으면 26.7.0→26.7.3 에 스키마 변경이 없다는 뜻)
+
+=== 파드 상태와 클러스터 ===
+  keycloak-0   1/1 Running restarts=0
+  keycloak-1   1/1 Running restarts=0
+  cluster: [keycloak-1-11418(v=16.0.14)|47] (2) [keycloak-1-11418(v=16.0.14), keycloak-0-58996(v=16.0.14)]
@@ -0,0 +1,20 @@
+=== ★ 가설: 스키마 변경이 없으면 롤백이 된다 (26.7.3 → 26.7.0) ===
+  시작: 15:25:08
+partitioned roll out complete: 2 new pods have been updated...
+  완료: 15:25:53
+
+  200 응답: 43 회 / 비200: 1
+
+  keycloak-0   1/1 Running restarts=0
+  keycloak-1   1/1 Running restarts=0
+  Keycloak 26.7.0
+  마이그레이션: 210
+  세션:        3
+=== 롤백 중 응답 시계열 (비200 위치) ===
+  200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 
+  200 200 200 200 000 200 200 200 200 200 200 200 200 200 200 200 200 200 200 200 
+  200 200 200 200 
+  비200 값: 000
+
+=== 대조: 정방향 업그레이드 때는 ===
+  200: 87 / 비200: 0
@@ -0,0 +1,66 @@
+# B-4 ③ — IdP 의 클레임 변경은 언제 upstream 에 반영되는가
+#
+# 이 파일은 재수집본이다. 첫 수집본은 "이제 요청을 반복해 본다" 에서 끝났고,
+# 그 뒤의 12회 결과는 브라우저 콘솔에서만 보고 파일로 남기지 않았다.
+# 서브에이전트 감사가 "증거 없이 서 있는 결론" 으로 지적했고, 다시 측정했다.
+#
+# 수집 방법:
+#   - 요청부: Playwright 로 연 브라우저에서 fetch('/api/echo') 를 반복.
+#     oauth2-proxy 세션 쿠키가 HttpOnly 라 curl 로는 재현할 수 없어 브라우저를 썼다.
+#     아래 출력은 브라우저 콘솔이 돌려준 문자열 그대로다.
+#   - 변경부·저장소 확인부: test-server 의 kubectl 출력 그대로.
+
+=== [1] 기준선 — 변경 전 (브라우저 fetch) ===
+2026-09-04T07:51:23.862Z  req#1  HTTP 200  x-forwarded-email=labuser@example.com  x-forwarded-preferred-username=labuser
+2026-09-04T07:51:24.304Z  req#2  HTTP 200  x-forwarded-email=labuser@example.com  x-forwarded-preferred-username=labuser
+2026-09-04T07:51:24.722Z  req#3  HTTP 200  x-forwarded-email=labuser@example.com  x-forwarded-preferred-username=labuser
+
+=== [2] IdP 에서 email 을 바꾼다 (kubectl 출력) ===
+  변경 시각(UTC): 2026-09-04T07:53:32.000Z
+  IdP 의 값:
+    [ {
+      "email" : "changed-labuser@example.com"
+    } ]
+  oauth2-proxy 세션: 1 개 (그대로 살아 있다)
+
+=== [시계 보정] 두 시계가 다르다 — 해석에 필요하다 ===
+  개발 머신(브라우저 fetch 의 타임스탬프): 2026-09-04T07:52:20Z
+  test-server (kubectl 출력의 타임스탬프): 2026-09-04T07:54:07Z
+  → test-server 가 약 107초 앞선다.
+     브라우저 07:51:56 = 서버 07:53:43 이므로, 아래 12회는 변경(07:53:32) 11초 뒤다.
+
+=== [3] 변경 후 12회 반복 (브라우저 fetch) ===
+2026-09-04T07:51:56.300Z  req#1   HTTP 200  x-forwarded-email=labuser@example.com
+2026-09-04T07:51:56.864Z  req#2   HTTP 200  x-forwarded-email=labuser@example.com
+2026-09-04T07:51:57.489Z  req#3   HTTP 200  x-forwarded-email=labuser@example.com
+2026-09-04T07:51:58.018Z  req#4   HTTP 200  x-forwarded-email=labuser@example.com
+2026-09-04T07:51:58.602Z  req#5   HTTP 200  x-forwarded-email=labuser@example.com
+2026-09-04T07:51:59.217Z  req#6   HTTP 200  x-forwarded-email=labuser@example.com
+2026-09-04T07:51:59.743Z  req#7   HTTP 200  x-forwarded-email=labuser@example.com
+2026-09-04T07:52:00.342Z  req#8   HTTP 200  x-forwarded-email=labuser@example.com
+2026-09-04T07:52:00.964Z  req#9   HTTP 200  x-forwarded-email=labuser@example.com
+2026-09-04T07:52:01.574Z  req#10  HTTP 200  x-forwarded-email=labuser@example.com
+2026-09-04T07:52:02.187Z  req#11  HTTP 200  x-forwarded-email=labuser@example.com
+2026-09-04T07:52:02.719Z  req#12  HTTP 200  x-forwarded-email=labuser@example.com
+
+  → 12회 · 약 6.4초 동안 전부 옛 값. 요청 횟수로는 반영되지 않는다.
+
+=== [4] IdP 값은 이미 바뀌어 있었다 (대조) ===
+  IdP:   "email" : "changed-labuser@example.com"
+
+=== [5] 세션을 지워 재인증을 강제한다 ===
+  남은 oauth2-proxy 세션: 0 개
+  (Keycloak SSO 는 살아 있으므로 조용히 재인증된다)
+
+=== [6] 재인증 후 (브라우저 fetch) ===
+2026-09-04T07:53:01.121Z  req#1  HTTP 200  x-forwarded-email=changed-labuser@example.com
+2026-09-04T07:53:01.456Z  req#2  HTTP 200  x-forwarded-email=changed-labuser@example.com
+2026-09-04T07:53:01.785Z  req#3  HTTP 200  x-forwarded-email=changed-labuser@example.com
+
+=== 결론 ===
+  변경 후 12회 요청(6.4초)  →  labuser@example.com          (옛 값)
+  세션 삭제 후 재인증        →  changed-labuser@example.com  (새 값)
+
+  → 반영 시점은 요청 횟수가 아니라 세션이 새로 만들어지는가로 정해진다.
+    --cookie-refresh 가 설정되어 있지 않으므로, 실제 운영에서는
+    쿠키 만료(1시간) 또는 재인증까지 옛 값이 간다.
@@ -0,0 +1,17 @@
+=== Prometheus 가 실제로 긁는 대상 (2026-09-04 18:10 KST) ===
+  keycloak         2개
+  kubelet          2개
+  node-exporter    2개
+  prometheus       1개
+
+=== B층 구성 요소의 지표가 있는가 ===
+  redis_up                         시계열 0개
+  redis_connected_clients          시계열 0개
+  redis_memory_used_bytes          시계열 0개
+  pg_up                            시계열 0개
+  pg_stat_database_numbackends     시계열 0개
+
+  → B-1·B-2·B-3·B-5 는 Grafana 증거를 만들 수 없다.
+    스크린샷을 안 찍은 것이 아니라 긁는 대상에 없다.
+    보완하려면 redis_exporter · postgres_exporter · BFF 의 /actuator/prometheus 를
+    scrape 대상에 추가해야 한다.
@@ -0,0 +1,76 @@
+재현 절차 명령 실행 검증 — 문서에 적힌 명령을 그대로 돌려본 기록
+====================================================================
+수집: 2026-09-04, kc-lab-1 에서 sudo kubectl (호스트 test-server 경유)
+대상: 감사에서 "산문이라 재현 불가"로 지적된 명령들을 셸 실행형으로 바꾼 뒤,
+      바꾼 형태가 실제로 도는지 확인한 것.
+
+왜 이 파일이 있나
+------------------
+바꾼 명령을 돌려보지 않고 "재현 가능하게 고쳤다"고 쓰면, 감사가 잡아낸 바로
+그 실수(측정하지 않고 단언)를 반복하는 것이다. 그래서 실행 기록을 남긴다.
+그리고 실제로 이 검증에서 한 건이 깨졌다 — 아래 [실패] 항목.
+
+환경
+----
+K0 = 10.42.1.142  (keycloak-0, kc-lab-2)
+K1 = 10.42.0.62   (keycloak-1, kc-lab-1)
+PW = keycloak-lab-secrets/KC_BOOTSTRAP_ADMIN_PASSWORD, 19자
+TE = /realms/master/protocol/openid-connect/token
+
+[통과] 검증 1 — A-3 의 sid 추출 파이프라인
+-------------------------------------------
+문서 experiment-a3-database-crash.md 2단계에 넣은 파이프라인
+(access_token → 2번째 세그먼트 → '==' 패딩 → base64 -d → sid) 을 그대로 실행.
+
+  추출된 sid = YWfXBHn08DNujXvJ6QV1lMAd
+  /tmp/sids 줄수 = 1
+
+sid 는 UUID 가 아니라 24자 문자열이다. RPO 대조에서 IN 절에 넣을 때
+따옴표가 필요한 이유가 이것이다.
+
+[통과] 검증 2 — A-6 단일 요청 지연 (각 15회)
+---------------------------------------------
+  keycloak-0 평균 46 ms      (대조군: PostgreSQL 과 같은 노드)
+  keycloak-1 평균 86 ms      (시험군: 노드 간 홉이 하나 더 있다)
+
+주입 없는 평시 값이다. A-6 본문의 22.2초는 지연 주입 상태의 값이므로
+이 숫자와 직접 비교하면 안 된다. 여기서 확인한 것은 "명령이 돈다" 뿐이다.
+
+[실패 → 수정] 검증 3 — 동시 20건 부하
+--------------------------------------
+처음에 쓴 형태:
+  kubectl -n keycloak-lab run load --rm -i --restart=Never \
+    --image=curlimages/curl:8.11.1 --quiet --command -- sh -c '... & ... wait'
+
+결과: 출력이 도착하지 않고 세션이 그대로 끊겼다. 두 번 시도해서 두 번 다.
+일회성 파드(--rm -i)의 stdout 스트림이 20개 동시 자식 프로세스의 출력을
+잃는 문제이며, 이 실험 시리즈에서 이미 한 번 겪은 함정이다.
+내가 재현 절차를 고치면서 그 깨진 패턴을 다시 써넣었다.
+
+고친 형태 — 상주 탐침 + 파드 안 파일 수집 + 한 번 cat:
+  kubectl run a6-probe ... -- sleep 1800
+  kubectl exec a6-probe -- sh -c '... >> /tmp/load ) & ... wait'
+  kubectl exec a6-probe -- cat /tmp/load > /tmp/load.txt
+
+결과:
+  exit=0
+  수집된 줄수 = 20      ← 20 이어야 한다. 스트림 방식은 여기서 샜다.
+  상태코드별:
+       20 200
+  최대 지연 = 0.968958 s
+
+[통과] 검증 4 — 풀 지표
+------------------------
+  agroal_max_used_count{datasource="default"} 4.0
+  agroal_active_count{datasource="default"} 0.0
+  agroal_awaiting_count{datasource="default"} 0.0
+  agroal_blocking_time_average_milliseconds{datasource="default"} 0.0
+
+동시 20건에도 max_used 가 4 에 그치고 awaiting 이 0 이다.
+평시에는 풀이 병목이 아니라는 뜻이며, A-6 이 지연을 주입해야만
+경합이 나타난다고 적은 것과 일치한다.
+
+남는 교훈
+---------
+"명령을 실행 가능하게 고쳤다"와 "고친 명령이 동작한다"는 다른 주장이다.
+검증 3 이 그 차이를 보여준다 — 문법적으로는 멀쩡했고, 실행하면 조용히 실패했다.
@@ -0,0 +1,19 @@
+# 후속 — 미측정으로 남겼던 항목을 채운 기록
+
+2026-09-04 17:35–18:20 KST
+해설: [`docs/experiment-followup-untested-items.md`](../../experiment-followup-untested-items.md)
+
+| 파일 | 무엇을 보여주는가 |
+|---|---|
+| `01-d2-forward-upgrade.txt` | **D-2 정방향** 26.7.0 → 26.7.3. 백업 396KB · **87회 요청 전부 200(무중단)** · 마이그레이션 210 → 210(스키마 변경 없음) · 세션 3 유지 · Infinispan 16.0.12 → 16.0.14 |
+| `02-d2-rollback-same-schema.txt` | **스키마가 안 바뀌면 롤백이 된다** — 26.7.3 → 26.7.0 성공. 다만 전환 순간 `000` 1회(3초 타임아웃) |
+| `03-b4-role-propagation.txt` | **B-4 ③** IdP 에서 값을 바꿔도 **12회 요청·6초 동안 옛 값**. 세션 삭제 후 재인증에서야 새 값 |
+| `04-observability-gap.txt` | **B층에 관측이 없다** — Prometheus 는 keycloak·kubelet·node-exporter·prometheus 만 긁는다. Redis·BFF·PostgreSQL 지표가 0개 |
+| `05-command-reproducibility.txt` | **재현 절차 명령을 실제로 돌려본 기록.** 산문이던 측정 장치를 셸 실행형으로 바꾼 뒤 실행 검증 — 4건 중 1건(동시 20건 부하)이 **조용히 실패**했고 상주 탐침 방식으로 고쳐 20/20 수집 |
+
+## 핵심 세 줄
+
+1. **"롤백은 안 된다" 는 조건부였다.** 스키마가 바뀌었으면 안 되고, 안 바뀌었으면 된다 — D-2 의 결론을 정밀화한다.
+2. **role 변경은 요청 횟수와 무관하게 반영되지 않는다.** `--cookie-refresh` 가 없으면 쿠키 만료나 재인증까지 옛 값이 간다.
+3. **바꾼 명령은 돌려봐야 안다.** 문법이 멀쩡해도 일회성 파드는 동시 출력에서 조용히 샜다 — 05 참조.
+4. **B층 실험에 Grafana 증거가 없는 이유가 확인됐다** — 관측 대상에 애초에 없다. 스크린샷이 없는 것이 아니라 지표가 없다.
@@ -471,7 +471,7 @@ kubectl -n keycloak-lab exec keycloak-0 -- \
 ```sql
 select offline_flag, count(*) from offline_user_session group by offline_flag;
 select user_session_id, offline_flag, created_on, last_session_refresh
-  from offline_user_session where user_session_id = '<sid>';
+  from offline_user_session where user_session_id = '$SID';
 ```

 **이름이 내용을 배신하는 스키마다.** 운영에서 "온라인 세션이 DB 어디 있냐"를
@@ -597,6 +597,23 @@ for n in ('BEFORE_K0','BEFORE_K1','AFTER_K0','AFTER_K1'):

 ---

+---
+
+## 증거 파일
+
+**증거 수집 시각: 2026-09-04 09:52 – 10:12 KST** (파일 mtime 기준. 문서 상단의 시각 표기는 작성 시점이라 다를 수 있다.)
+
+| 파일 | 종류 |
+|---|---|
+| [`01-cross-node-session.txt`](evidence/session-replication/01-cross-node-session.txt) | 터미널 원문 |
+| [`02-cache-delta.txt`](evidence/session-replication/02-cache-delta.txt) | 터미널 원문 |
+| [`03-cache-ownership.txt`](evidence/session-replication/03-cache-ownership.txt) | 터미널 원문 |
+| [`04-read-path-sql.txt`](evidence/session-replication/04-read-path-sql.txt) | 터미널 원문 |
+| [`keycloak-admin-sessions.png`](evidence/session-replication/keycloak-admin-sessions.png) | 스크린샷 |
+| [`session-cache-entries-per-pod.png`](evidence/session-replication/session-cache-entries-per-pod.png) | 스크린샷 |
+
+파일별 상세는 [`evidence/session-replication/README.md`](evidence/session-replication/README.md).
+
 ## 11. 재현

 ```bash
@@ -631,6 +648,6 @@ kubectl -n keycloak-lab exec deploy/postgres -- psql -U keycloak -d keycloak \
  -c "select offline_flag, count(*) from offline_user_session group by offline_flag"

 # 노드별 캐시 엔트리 (파드 안에서)
-curl -s http://<pod-ip>:9000/metrics \
+curl -s http://$(kubectl -n keycloak-lab get pod keycloak-0 -o jsonpath='{.status.podIP}'):9000/metrics \
  | grep 'approximate_entries_unique{cache="sessions"'
 ```
@@ -177,15 +177,34 @@ sudo conntrack -D -p tcp -s 10.42.1.43 -d 10.42.0.35 --sport 7800 --dport 40023
 **양쪽 노드에서, 양쪽 방향으로** 지워야 한다. 서버 쪽 노드에는 튜플이 뒤집혀
 기록되어 있다.

-그리고 **즉시 끊기지 않는다.**
+### ★ 정정 — conntrack 삭제가 분단을 만들었다고 볼 근거가 없다
+
+이 문서는 처음에 이렇게 썼다.

 ```
 11:41  conntrack 삭제
 11:44  cluster_size 2 → 1        ← 약 3분 뒤
 ```

-TCP 는 상대가 사라졌음을 **재전송 타임아웃**으로 알아낸다. 소켓은 한동안
-`ESTABLISHED` 로 남아 있다.
+**증거를 다시 보면 그 인과가 성립하지 않는다.**
+
+| 시각 | 증거 |
+|---|---|
+| 11:41 | conntrack 삭제. 직후 `07-cluster-size.txt` 는 **11:45 까지 전부 `2`** |
+| **11:44:23** | **`keycloak-0` 파드의 `startTime`** — 스스로 재시작했다 |
+| 11:44:27 | `cluster_size` 2 → 1 |
+| 11:46:07 | 내가 `delete pod` 를 실행 (이미 떨어진 뒤) |
+
+**하락은 conntrack 삭제 3분 뒤가 아니라 파드 재시작 4초 뒤에 일어났다.**
+같은 문서 6절이 "정책이 걸린 채 재시작되자" 라고 쓴 것이 맞고,
+**4절의 "conntrack 삭제 → 3분 뒤 분단" 은 시각이 겹친 것을 인과로 읽은 것이다.**
+
+conntrack 삭제 자체가 무의미했다는 뜻은 아니다 — 다만 **이 실험은
+그것만으로 분단이 되는지 판정하지 못했다.** 판정한 것은 A-5 이고,
+거기서 `raw` 테이블이 필요하다는 것이 드러났다.
+
+> TCP 가 재전송 타임아웃으로 상대를 알아채는 것은 사실이지만,
+> **이 실험에서 그 경로가 발동했다는 증거는 없다.**

 ---

@@ -427,7 +446,11 @@ kubectl -n keycloak-lab delete networkpolicy a1-block-jgroups-transport

 ```bash
 sudo conntrack -L | grep 7800
-sudo conntrack -D -p tcp -s <src> -d <dst> --sport <sp> --dport <dp>
+# 위 출력의 src/dst/sport/dport 를 그대로 넣는다. 한 줄로 하려면:
+sudo conntrack -L 2>/dev/null | grep 7800 | awk '{
+  for(i=1;i<=NF;i++){ split($i,a,"="); t[a[1]]=a[2] }
+  print "sudo conntrack -D -p tcp -s "t["src"]" -d "t["dst"]" --sport "t["sport"]" --dport "t["dport"]
+}' | sh
 ```

 ### FD_SOCK2 와 포트 규약
@@ -462,6 +485,30 @@ vendor_jgroups_merge3_get_num_merge_events

 ---

+---
+
+## 증거 파일
+
+**증거 수집 시각: 2026-09-04 11:34 – 11:50 KST** (파일 mtime 기준. 문서 상단의 시각 표기는 작성 시점이라 다를 수 있다.)
+
+| 파일 | 종류 |
+|---|---|
+| [`01-baseline-cluster.txt`](evidence/a1-jgroups-transport-block/01-baseline-cluster.txt) | 터미널 원문 |
+| [`02-control-before-block.txt`](evidence/a1-jgroups-transport-block/02-control-before-block.txt) | 터미널 원문 |
+| [`03-block-applied.txt`](evidence/a1-jgroups-transport-block/03-block-applied.txt) | 터미널 원문 |
+| [`04-after-block-state.txt`](evidence/a1-jgroups-transport-block/04-after-block-state.txt) | 터미널 원문 |
+| [`05-conntrack-problem.txt`](evidence/a1-jgroups-transport-block/05-conntrack-problem.txt) | 터미널 원문 |
+| [`06-partition-observed.txt`](evidence/a1-jgroups-transport-block/06-partition-observed.txt) | 터미널 원문 |
+| [`07-cluster-size.txt`](evidence/a1-jgroups-transport-block/07-cluster-size.txt) | 터미널 원문 |
+| [`08-restart-forced-partition.txt`](evidence/a1-jgroups-transport-block/08-restart-forced-partition.txt) | 터미널 원문 |
+| [`09-cross-node-under-partition.txt`](evidence/a1-jgroups-transport-block/09-cross-node-under-partition.txt) | 터미널 원문 |
+| [`10-logout-not-propagated.txt`](evidence/a1-jgroups-transport-block/10-logout-not-propagated.txt) | 터미널 원문 |
+| [`11-service-impact.txt`](evidence/a1-jgroups-transport-block/11-service-impact.txt) | 터미널 원문 |
+| [`12-recovery.txt`](evidence/a1-jgroups-transport-block/12-recovery.txt) | 터미널 원문 |
+| [`a1-cluster-size-partition-recovery.png`](evidence/a1-jgroups-transport-block/a1-cluster-size-partition-recovery.png) | 스크린샷 |
+
+파일별 상세는 [`evidence/a1-jgroups-transport-block/README.md`](evidence/a1-jgroups-transport-block/README.md).
+
 ## 11. 재현 절차 (명령어)

 ```bash
@@ -481,8 +528,14 @@ kubectl -n keycloak-lab get pods -o wide | grep keycloak     # restarts=0 확인
 ssh kc-lab-1 'sudo conntrack -L | grep 7800'

 # 4. conntrack 삭제 (양쪽 노드, 양쪽 방향). 반영까지 약 3분
-ssh kc-lab-1 'sudo conntrack -D -p tcp -s <k1ip> -d <k0ip> --sport <sp> --dport 7800'
-ssh kc-lab-2 'sudo conntrack -D -p tcp -s <k0ip> -d <k1ip> --sport 7800 --dport <sp>'
+# 노드마다 자기 conntrack 표에서 7800 튜플을 뽑아 그대로 지운다.
+# 방향(누가 client 인지)은 재시작마다 바뀐다 — 그래서 손으로 적으면 틀린다(A-5 에서 실제로 틀렸다).
+for N in kc-lab-1 kc-lab-2; do
+  ssh $N "sudo conntrack -L 2>/dev/null | grep 7800 | awk '{
+    for(i=1;i<=NF;i++){ split(\$i,a,\"=\"); t[a[1]]=a[2] }
+    print \"sudo conntrack -D -p tcp -s \"t[\"src\"]\" -d \"t[\"dst\"]\" --sport \"t[\"sport\"]\" --dport \"t[\"dport\"]
+  }' | sh"
+done

 # 5. 분단 확인
 curl -s "http://localhost:19090/api/v1/query?query=vendor_cluster_size"
@@ -9,6 +9,15 @@

 ---

+## 구조
+
+![A-2 구조 — DB 정지 시 살아남는 노드가 없다](diagrams/a2-database-loss.svg)
+
+> 다이어그램 규약은 [`diagrams/_style.md`](diagrams/_style.md).
+> 실험대 전체 구조는 [`diagrams/lab-topology.svg`](diagrams/lab-topology.svg).
+
+---
+
 ## 0. 결론부터

 | 예측 | 결과 |
@@ -94,12 +103,19 @@ kubectl -n keycloak-lab wait --for=delete pod -l app=postgres --timeout=90s
  ① 캐시를 가진 노드(keycloak-0)에서 refresh   HTTP 500
  ② 캐시가 없는 노드(keycloak-1)에서 refresh   HTTP 500
  ③ 새 로그인                                  HTTP 500
-  ④ 관리 API (세션 조회 필요)                   HTTP 500
+  ④ 관리 API (세션 조회 필요)                   HTTP 500   ← 5절의 재측정값

  --- 오류 본문 ---
  {"error":"unknown_error","error_description":"For more on this error consult the server log."}
 ```

+> **④ 의 첫 측정은 오염됐다** —
+> [`03-four-paths.txt`](evidence/a2-database-loss/03-four-paths.txt) 에는
+> `HTTP 000000{"error":"HTTP 401 Unauthorized"}401` 이 남아 있다.
+> `curl -w %{http_code}` 출력에 본문이 섞인 것이고, 재시도가 `000` 을 세 번
+> 찍은 뒤 `401` 이 왔다. **위 표의 `500` 은 5절에서 다시 잰 값**이며,
+> 첫 측정을 그대로 쓰지 않았다.
+
 ### ① 이 500 인 것이 중요하다

 **캐시에 세션을 들고 있어도 refresh 는 실패한다.**
@@ -263,6 +279,23 @@ DB 가 돌아와도 CrashLoopBackOff 의 백오프 때문에 회복이 늦어진

 ---

+---
+
+## 증거 파일
+
+**증거 수집 시각: 2026-09-04 11:53 – 11:56 KST** (파일 mtime 기준. 문서 상단의 시각 표기는 작성 시점이라 다를 수 있다.)
+
+| 파일 | 종류 |
+|---|---|
+| [`01-baseline.txt`](evidence/a2-database-loss/01-baseline.txt) | 터미널 원문 |
+| [`02-setup-sessions.txt`](evidence/a2-database-loss/02-setup-sessions.txt) | 터미널 원문 |
+| [`03-four-paths.txt`](evidence/a2-database-loss/03-four-paths.txt) | 터미널 원문 |
+| [`04-health-and-service.txt`](evidence/a2-database-loss/04-health-and-service.txt) | 터미널 원문 |
+| [`05-recovery.txt`](evidence/a2-database-loss/05-recovery.txt) | 터미널 원문 |
+| [`a2-up-stayed-1-during-outage.png`](evidence/a2-database-loss/a2-up-stayed-1-during-outage.png) | 스크린샷 |
+
+파일별 상세는 [`evidence/a2-database-loss/README.md`](evidence/a2-database-loss/README.md).
+
 ## 9. 재현 절차 (명령어)

 ```bash
@@ -275,7 +308,9 @@ kubectl -n keycloak-lab wait --for=condition=Ready pod/a2-probe --timeout=120s
 kubectl -n keycloak-lab exec a2-probe -- sh -c \
  'curl -s -X POST http://<k0>:8080/realms/master/protocol/openid-connect/token \
     -d grant_type=password -d client_id=admin-cli \
-     -d username=admin -d password=<pw> > /tmp/tok.json'
+     -d username=admin -d password='"$PW"' > /tmp/tok.json'
+#   PW=$(kubectl -n keycloak-lab get secret keycloak-lab-secrets \
+#          -o jsonpath='{.data.KC_BOOTSTRAP_ADMIN_PASSWORD}' | base64 -d)

 # 2. DB 정지
 kubectl -n keycloak-lab scale deployment/postgres --replicas=0
@@ -181,8 +181,23 @@ database system is ready to accept connections
  ★ p5XybeQIYmAs818gO4Vl_5ea
 ```

-**약 2.6% 유실.** 초당 19건 정도 로그인하던 중이었으므로
-**대략 마지막 0.2초 분량**이다 — `wal_writer_delay` 기본값(200ms)과 맞는다.
+**약 2.6% 유실.**
+
+처음 이 문서는 *"초당 19건 … `wal_writer_delay` 기본값(200ms)과 맞는다"* 고
+썼는데, **그 시점에 `wal_writer_delay` 를 조회한 적이 없었다.** 나중에 쟀다.
+
+```
+ name                   | setting | unit | source
+------------------------+---------+------+---------
+ wal_writer_delay       | 200     | ms   | default
+ wal_writer_flush_after | 128     | 8kB  | default
+ synchronous_commit     | on      |      | default
+```
+[`08-wal-settings.txt`](evidence/a3-database-crash/08-wal-settings.txt)
+
+**값은 맞았지만 그때는 추정이었다.** 그리고 로그인 속도도 정확히는
+증거의 `8초에 112건` ≈ **초당 14건**이며 19건이 아니다. 4건은 그 속도에서
+**약 0.29초 분량**이고, 200ms 창과 같은 자릿수이되 정확히 일치하지는 않는다.

 ### 사용자에게 어떻게 보이는가

@@ -284,6 +299,25 @@ ALTER DATABASE keycloak SET synchronous_commit = on;   -- SET LOCAL 이 이깁

 ---

+---
+
+## 증거 파일
+
+**증거 수집 시각: 2026-09-04 11:58 – 16:32 KST** (파일 mtime 기준. 문서 상단의 시각 표기는 작성 시점이라 다를 수 있다.)
+
+| 파일 | 종류 |
+|---|---|
+| [`01-crash-injection.txt`](evidence/a3-database-crash/01-crash-injection.txt) | 터미널 원문 |
+| [`02-design-check.txt`](evidence/a3-database-crash/02-design-check.txt) | 터미널 원문 |
+| [`03-loss-measurement.txt`](evidence/a3-database-crash/03-loss-measurement.txt) | 터미널 원문 |
+| [`04-comparison.txt`](evidence/a3-database-crash/04-comparison.txt) | 터미널 원문 |
+| [`05-true-crash.txt`](evidence/a3-database-crash/05-true-crash.txt) | 터미널 원문 |
+| [`06-backend-kill-crash.txt`](evidence/a3-database-crash/06-backend-kill-crash.txt) | 터미널 원문 |
+| [`07-loss-result.txt`](evidence/a3-database-crash/07-loss-result.txt) | 터미널 원문 |
+| [`08-wal-settings.txt`](evidence/a3-database-crash/08-wal-settings.txt) | 터미널 원문 |
+
+파일별 상세는 [`evidence/a3-database-crash/README.md`](evidence/a3-database-crash/README.md).
+
 ## 8. 재현 절차 (명령어)

 ```bash
@@ -296,8 +330,21 @@ kubectl -n keycloak-lab exec deploy/postgres -- psql -U keycloak -d keycloak \
 kubectl -n keycloak-lab exec deploy/postgres -- psql -U keycloak -d keycloak \
  -c "delete from offline_user_session"

-# 2. 로그인 루프 (호스트에서 백그라운드 exec — 파드 안 & 는 exec 종료와 함께 죽는다)
-kubectl -n keycloak-lab exec a2-probe -- sh -c '<로그인 반복, sid 를 /tmp/sids 에>' &
+# 2. 로그인 루프 — 호스트에서 백그라운드로 exec 한다.
+#    파드 안에서 ( ... ) & 로 띄우면 exec 세션이 끝날 때 같이 죽는다(실측).
+K0=$(kubectl -n keycloak-lab get pod keycloak-0 -o jsonpath='{.status.podIP}')
+kubectl -n keycloak-lab exec a2-probe -- sh -c "
+  i=0
+  while [ \$i -lt 200 ]; do
+    R=\$(curl -s --max-time 5 -X POST http://$K0:8080/realms/master/protocol/openid-connect/token \
+         -d grant_type=password -d client_id=admin-cli -d username=admin -d password=lab-admin-change-me)
+    S=\$(echo \"\$R\" | sed -n 's/.*\"access_token\":\"\\([^\"]*\\)\".*/\\1/p' \
+         | cut -d. -f2 | sed 's/\$/==/' | base64 -d 2>/dev/null \
+         | sed -n 's/.*\"sid\":\"\\([^\"]*\\)\".*/\\1/p')
+    [ -n \"\$S\" ] && echo \"\$S\" >> /tmp/sids
+    i=\$((i+1))
+  done" >/dev/null 2>&1 &
+LOOP=$!

 # 3. 진짜 크래시 — 백엔드 프로세스에 SIGKILL
 kubectl -n keycloak-lab exec deploy/postgres -- \
@@ -306,9 +353,14 @@ kubectl -n keycloak-lab exec deploy/postgres -- \
 # 4. 주입이 걸렸는지 확인 — 이게 없으면 결과를 해석하지 않는다
 kubectl -n keycloak-lab logs deploy/postgres | grep -E "not properly shut down|redo"

-# 5. 대조
-kubectl -n keycloak-lab exec deploy/postgres -- psql -U keycloak -d keycloak -tAc \
-  "select count(*) from offline_user_session where user_session_id in (<sid 목록>)"
+# 5. 대조 — 클라이언트가 200 을 받은 sid 를 그대로 IN 절로 만든다
+kill $LOOP 2>/dev/null
+kubectl -n keycloak-lab exec a2-probe -- cat /tmp/sids > /tmp/sids.txt
+TOTAL=$(wc -l < /tmp/sids.txt)
+IN=$(sed "s/^/'/; s/$/'/" /tmp/sids.txt | paste -sd,)
+FOUND=$(kubectl -n keycloak-lab exec deploy/postgres -- psql -U keycloak -d keycloak -tAc \
+  "select count(*) from offline_user_session where offline_flag='0' and user_session_id in ($IN)")
+echo "클라이언트 성공 $TOTAL / DB 존재 $FOUND / 유실 $((TOTAL-FOUND))"
 ```

 ---
@@ -24,7 +24,7 @@
 | 외부 응답 | **503** | **000** (연결 자체가 안 됨) |
 | `kubectl` | 정상 | **불통** |
 | 살아 있는 워크로드 | keycloak-1 (하지만 DB 없음) | **keycloak-0 은 계속 돌고 있다** |
-| 복구 시간 | **60초** | **60초** |
+| **`virsh start` 이후** 복구 | **60초** | **60초** |

 **둘 다 전면 장애**지만 이유가 다르다. 4a 는 **DB 가 같이 죽어서**, 4b 는
 **들어갈 길이 없어서**다.
@@ -204,6 +204,15 @@ virsh start kc-lab-2

 **60초.** 사람 개입 없이 전부 제자리로 돌아왔다.

+> **이 60초는 MTTR 이 아니다.** `virsh start` 를 친 뒤의 시간이며,
+> 실제 장애 구간은 **12:07:43(차단) → 12:17:31(서비스 복귀) ≈ 10분**이다.
+> 그 대부분은 내가 관찰하며 보낸 시간이고, **사람이 알아채고 결정하는 시간이
+> 복구 시간의 대부분**이라는 점이 오히려 현실적이다.
+>
+> 그리고 본문의 `40초`(node-monitor-grace-period)와 `5분`(tolerationSeconds)은
+> **쿠버네티스 기본값을 인용한 것**이며, 관측된 전이 시점(+45초, +270초)이
+> 그 값과 모순되지 않는다는 것까지가 이 실험이 말할 수 있는 범위다.
+
 ---

 ## 4b. 컨트롤 플레인 노드 상실 (`kc-lab-1`)
@@ -358,6 +367,26 @@ virsh start kc-lab-1

 ---

+---
+
+## 증거 파일
+
+**증거 수집 시각: 2026-09-04 12:05 – 12:23 KST** (파일 mtime 기준. 문서 상단의 시각 표기는 작성 시점이라 다를 수 있다.)
+
+| 파일 | 종류 |
+|---|---|
+| [`01-baseline.txt`](evidence/a4-node-loss/01-baseline.txt) | 터미널 원문 |
+| [`02-worker-node-killed.txt`](evidence/a4-node-loss/02-worker-node-killed.txt) | 터미널 원문 |
+| [`03-state-during-loss.txt`](evidence/a4-node-loss/03-state-during-loss.txt) | 터미널 원문 |
+| [`04-eviction-timing.txt`](evidence/a4-node-loss/04-eviction-timing.txt) | 터미널 원문 |
+| [`05-recovery.txt`](evidence/a4-node-loss/05-recovery.txt) | 터미널 원문 |
+| [`06-control-plane-inventory.txt`](evidence/a4-node-loss/06-control-plane-inventory.txt) | 터미널 원문 |
+| [`07-control-plane-loss.txt`](evidence/a4-node-loss/07-control-plane-loss.txt) | 터미널 원문 |
+| [`08-control-plane-recovery.txt`](evidence/a4-node-loss/08-control-plane-recovery.txt) | 터미널 원문 |
+| [`a4-up-dropped-per-node.png`](evidence/a4-node-loss/a4-up-dropped-per-node.png) | 스크린샷 |
+
+파일별 상세는 [`evidence/a4-node-loss/README.md`](evidence/a4-node-loss/README.md).
+
 ## 6. 재현 절차 (명령어)

 ```bash
@@ -375,7 +404,7 @@ kubectl get node kc-lab-2                        # 40초 뒤 NotReady
 kubectl -n keycloak-lab get pods -o wide         # Running 인 채로 얼어 있다
 kubectl get node kc-lab-2 -o jsonpath='{.spec.taints}'
 #   5분 뒤 Terminating + 새 파드 Pending
-kubectl -n keycloak-lab describe pod <new-pod> | grep -A4 Events
+kubectl -n keycloak-lab describe pod $(kubectl -n keycloak-lab get pods -l app=postgres --field-selector=status.phase=Pending -o jsonpath='{.items[0].metadata.name}') | grep -A4 Events

 # 4b 컨트롤 플레인 상실 — kubectl 이 죽으므로 노드에서 직접 본다
 virsh destroy kc-lab-1
@@ -137,6 +137,16 @@ kubectl -n keycloak-lab logs keycloak-0 --since=20m | grep ISPN000094 | awk '$2
  suspected  = 0
 ```

+> **맥락 하나가 빠져 있었다** —
+> [`06-view-history-and-cleanup.txt`](evidence/a5-asymmetric-partition/06-view-history-and-cleanup.txt)
+> 를 보면 뷰 13 은 **주입(03:33:58)보다 9초 앞선 03:33:49 의 `MergeView`** 로
+> 만들어졌고, 그 직전에는 `|12] (1)` — 즉 **막 분단됐다가 합쳐진 직후**였다.
+> `merge_events = 1.0` 도 그 병합의 것이다.
+>
+> **"주입 전부터 그대로" 는 맞지만, 그 "전" 이 9초였다.**
+> 앞선 실패한 주입 시도들이 만든 흔들림이고, 주입 이후 뷰가 변하지 않았다는
+> 결론 자체는 유지된다.
+
 ### 왜 안 갈라졌는가 — **연결 방향이 뒤집혔다**

 ```
@@ -281,6 +291,26 @@ JGroups 코디네이터는 **가장 오래된 멤버**다. 분단이 나면

 ---

+---
+
+## 증거 파일
+
+**증거 수집 시각: 2026-09-04 12:29 – 16:34 KST** (파일 mtime 기준. 문서 상단의 시각 표기는 작성 시점이라 다를 수 있다.)
+
+| 파일 | 종류 |
+|---|---|
+| [`01-injection.txt`](evidence/a5-asymmetric-partition/01-injection.txt) | 터미널 원문 |
+| [`02-injection-verify.txt`](evidence/a5-asymmetric-partition/02-injection-verify.txt) | 터미널 원문 |
+| [`03-raw-table-injection.txt`](evidence/a5-asymmetric-partition/03-raw-table-injection.txt) | 터미널 원문 |
+| [`04-correct-direction.txt`](evidence/a5-asymmetric-partition/04-correct-direction.txt) | 터미널 원문 |
+| [`05-reconnect-observed.txt`](evidence/a5-asymmetric-partition/05-reconnect-observed.txt) | 터미널 원문 |
+| [`06-view-history-and-cleanup.txt`](evidence/a5-asymmetric-partition/06-view-history-and-cleanup.txt) | 터미널 원문 |
+| [`07-bidirectional-block.txt`](evidence/a5-asymmetric-partition/07-bidirectional-block.txt) | 터미널 원문 |
+| [`08-coordinator-and-recovery.txt`](evidence/a5-asymmetric-partition/08-coordinator-and-recovery.txt) | 터미널 원문 |
+| [`a5-cluster-size-bidirectional-block.png`](evidence/a5-asymmetric-partition/a5-cluster-size-bidirectional-block.png) | 스크린샷 |
+
+파일별 상세는 [`evidence/a5-asymmetric-partition/README.md`](evidence/a5-asymmetric-partition/README.md).
+
 ## 6. 재현 절차 (명령어)

 ```bash
@@ -288,14 +318,14 @@ JGroups 코디네이터는 **가장 오래된 멤버**다. 분단이 나면
 ssh kc-lab-1 'sudo conntrack -L | grep 7800'

 # 2. 수신측 노드의 raw PREROUTING 에 넣는다 (filter 는 CNI 와 경쟁한다)
-ssh kc-lab-1 'sudo iptables -t raw -I PREROUTING 1 -p tcp -d <수신 파드IP> --dport 7800  -j DROP'
-ssh kc-lab-1 'sudo iptables -t raw -I PREROUTING 1 -p tcp -d <수신 파드IP> --dport 57800 -j DROP'
+ssh kc-lab-1 'sudo iptables -t raw -I PREROUTING 1 -p tcp -d $(kubectl -n keycloak-lab get pod keycloak-1 -o jsonpath='{.status.podIP}') --dport 7800  -j DROP'
+ssh kc-lab-1 'sudo iptables -t raw -I PREROUTING 1 -p tcp -d $(kubectl -n keycloak-lab get pod keycloak-1 -o jsonpath='{.status.podIP}') --dport 57800 -j DROP'

 # 3. 걸렸는지 카운터로 확인 — 0 이면 해석 금지
 ssh kc-lab-1 'sudo iptables -t raw -L PREROUTING -n -v'

 # 4. 양방향으로 하려면 반대 노드에도 (한 방향만으로는 자가 치유된다)
-ssh kc-lab-2 'sudo iptables -t raw -I PREROUTING 1 -p tcp -d <반대 파드IP> --dport 7800 -j DROP'
+ssh kc-lab-2 'sudo iptables -t raw -I PREROUTING 1 -p tcp -d $(kubectl -n keycloak-lab get pod keycloak-0 -o jsonpath='{.status.podIP}') --dport 7800 -j DROP'

 # 5. 분단 확인
 kubectl -n keycloak-lab exec deploy/postgres -- psql -U keycloak -d keycloak \
--- a/Show More
+++ b/Show More
Author	SHA1	Message	Date
DongHyeonkaandClaude Opus 5	9dbee18a42	docs(b4): item 3 is no longer unmeasured — link it to the follow-up result B-4 left role propagation open because oauth2-proxy was not deployed yet. B-7 deployed it and the follow-up measured it: the value does not change with request count, only when a new session is created. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>	2026-09-04 18:10:43 +09:00
DongHyeonkaandClaude Opus 5	905392947d	docs: close the three untested items — all three are now measured D-2 forward upgrade and B-4 role propagation were filled earlier. D-4 forced renewal was the third, and it needed a person at the keyboard because the host asks for a sudo password. It turned out to hold the largest finding of the three: the renewal succeeded and went unserved for 36 minutes 39 seconds, because nothing in the setup reloads nginx — no ExecStartPost, three empty hook directories, no nginx plugin. And the half of the plan's question that was still an expectation is now a measurement: the reload is graceful, 8856 connections with zero failures and an in-flight request surviving intact. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>	2026-09-04 18:10:04 +09:00
DongHyeonkaandClaude Opus 5	faf55dc1be	docs(d4): the renewal succeeded and was not served for 36 minutes 39 seconds The forced renewal did work. What did not work was anything making nginx notice. disk cert2.pem written 2026-09-04 17:22:13 KST network old serial through 08:58:47 UTC, new serial from 08:58:52 UTC gap 2199 seconds, and the old certificate was observed 428 times in it The gap closed only because a person ran `nginx -s reload`. Nothing else would have: certbot-renew.service is just `ExecStart=/usr/bin/certbot -q renew` with no ExecStartPost, all three of renewal-hooks/{deploy,post,pre} are empty, and certbot 5.7.0 here has no nginx plugin (dns-cloudflare, manual, null, standalone, webroot). Three paths, all empty. Any one of them would have been enough. nginx holds the certificate in memory from startup, and certbot swaps the live/ symlink rather than the path — so the config still looks right while the served certificate is stale. Master 585 and worker 586 sharing a start time 22.4 hours old is what proved no reload had happened. This is invisible for 88 days. The timer ran twice today and exited 0/SUCCESS both times, because a renewal is not due yet. The day it becomes due, the symptom is an expired certificate and the log still says SUCCESS. The other half of the plan's question now has a measurement rather than an expectation. The reload is genuinely graceful: 8856 polled connections, zero non-200, p95 205.7ms before against 204.3ms after. And an in-flight request — 845KB pulled at 20k/s, so still transferring 12 seconds in when the reload landed — completed with all 845361 bytes over a single connection. The earlier note that nginx reload "is graceful by design but must not be written that way without checking" was right to hold back. The neighbouring belief, that renewing gets the new certificate served, was the one that was false, and there was no way to tell in advance which it would be. Adds diagrams/d4-renewal-gap.svg and evidence 09-13. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>	2026-09-04 18:04:44 +09:00
DongHyeonkaandClaude Opus 5	0d84921a56	docs(d4): the renewal unit has no reload, and nginx has not reloaded in 22 hours The forced renewal did not change the certificate being served — 161 serial samples over 13 minutes, all identical, notBefore still Sep 3. Two things were readable without sudo and both matter. nginx has never been reloaded: master 585 and worker 586 share a start time and both are 80529 seconds old. A reload keeps the master and replaces the workers, so the original fork still being there means no reload has happened since Sep 3 19:00. nginx reads the certificate at startup and holds it in memory; without a reload it serves the old one no matter what is on disk. And the unit that is supposed to renew has nothing that would reload it: [Service] Type=oneshot ExecStart=/usr/bin/certbot -q renew PrivateTmp=true No ExecStartPost, no --deploy-hook. The timer runs twice a day and exited 0/SUCCESS both times today, which is precisely why this stays invisible — the renewal is not due for 88 days, so nothing has failed yet. What remains undetermined is whether the user's --force-renewal failed, or succeeded and left new files that nginx never picked up. Telling those apart needs /etc/letsencrypt, which is root-only. If it is the latter, that is the most valuable thing this lab has produced: "renewal succeeded" and "the new certificate is being served" are different events. CT logs looked like a way around the permission problem and were not: the served certificate carries two valid SCTs, yet crt.sh returns zero rows for auth.hyeonworks.com. Same shape as A-2's `up` metric — the observing tool sees a subset of the truth. Also recorded: 76 in-flight failures at 08:15:04 are a local artifact, not a server event. The concurrent 0.2s poll was clean across the same second, num_connects was 0, and time_total was 50 microseconds. Not reproducible in 100 retries. The monitor now records curl's exit code so a recurrence is diagnosable. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>	2026-09-04 17:28:01 +09:00
DongHyeonkaandClaude Opus 5	716e62524a	docs(d4): measure the controls before the injection that needs a password The forced renewal needs sudo on the host, and the host asks for a password. That blocks the injection, not the experiment — the part worth doing first was the control anyway. Control 1 — new connections, 0.2s x 900 over 180s: 900/900 = 200, zero failures. The noise floor is 0, so a single non-200 during the renewal can be attributed to the renewal. Without this the observation would have been uninterpretable, which is the mistake A-6 made calling a -41% control "no effect" and A-8 made claiming zero-downtime from 9 samples. Control 2 — the poll cannot answer the question the plan actually asked. TLS handshakes were 900/900, meaning every request is a fresh connection, so it measures "are new connections accepted", not "what happens to a request already in flight". A separate device: the 845KB admin console bundle pulled at --limit-rate 20k, holding one request open for 42 seconds. Baseline 200 / 845361 bytes / 1 connection. Monitors are running under setsid, and stop three minutes after the certificate serial changes. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>	2026-09-04 17:12:31 +09:00
DongHyeonkaandClaude Opus 5	74c9b3cea7	docs: replace prose placeholders in reproduction steps with executable commands The audit found ~80 placeholders, and the damaging ones were where the measuring apparatus itself was prose rather than a command: a6 "( curl ... ) & 를 20개 띄우고 wait" — the 22.2s headline came from this a3 "<로그인 반복, sid 를 /tmp/sids 에>" — the whole RPO measurement a3 "<sid 목록>" — the control it is compared against a5 "<수신 파드IP>" — the injection a8 writes /tmp/tok, reads /tmp/rt — self-inconsistent, sent an empty token b3 $KC / $RT / $NEW never assigned c2 bare kcadm.sh with no kubectl exec a1 conntrack tuples written by hand, though the direction flips per restart Each is now a shell-expandable form: pod IPs from jsonpath, the admin password from the secret, ids from kcadm --format csv, conntrack tuples derived from "conntrack -L" with awk rather than transcribed. Then the rewritten commands were executed against the live cluster, and one of them failed — the 20-way load generator, written as "kubectl run --rm -i", lost its output stream twice in a row. That is a trap this series already hit once, and the rewrite reintroduced it. A-6 now uses a resident probe pod that collects into a file and is cat-ed once; verified 20/20 lines. Evidence: docs/evidence/followup/05-command-reproducibility.txt Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>	2026-09-04 17:01:54 +09:00
DongHyeonkaandClaude Opus 5	f3f3a8da46	docs: re-measure B-4 role propagation and record it as evidence The twelve-request result and the post-reauth value were printed in the document but never written to a file; the audit flagged it as a conclusion standing without evidence. Measured again with timestamps into 03-b4-role-propagation.txt, which also surfaced a 107-second clock skew between the browser host and the lab host that the file now records so the two timelines can be compared. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>	2026-09-04 16:54:05 +09:00
DongHyeonkaandClaude Opus 5	e0d27d47ce	docs: correct the places where documents contradicted their own evidence An independent audit found ten documents printing values their evidence files do not contain. C-1 printed a session count of 0 where the evidence says 4, C-2 printed a success readback for a command that exited 1, and A-1 credited the conntrack flush with a split that the timestamps attribute to a pod restart four seconds earlier. Also measured wal_writer_delay, which A-3 had asserted as matching without ever querying it, relabelled the A-6 control that moved 41 percent, noted A-8's nine-sample resolution, corrected D-1's RTO to the 41 seconds its own timeline shows, and added a correction banner to D-2. Every experiment document now links its evidence files with their real collection times, and the duplicate screenshots are documented as duplicates. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>	2026-09-04 16:35:49 +09:00
DongHyeonkaandClaude Opus 5	78b270559c	docs: add SVG diagrams, explicit concept sections and the diagram convention Twelve SVG architecture diagrams cover the experiments whose documents had little or no structure drawing, embedded under a 구조 heading with a shared convention file. Seven documents carried their concepts under narrative headings and now have an explicit 개념 section so they can be found. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>	2026-09-04 16:20:05 +09:00
DongHyeonkaandClaude Opus 5	98a74e90a5	docs: fill the untested items and record why the B layer has no graphs The forward upgrade to 26.7.3 was zero downtime across 87 samples, and since databasechangelog stayed at 210 the rollback to 26.7.0 also succeeded, which narrows D-2's conclusion: rolling back fails when the schema moved, not because of the version number. The row count is the check. Role changes never reach the upstream through request repetition; the session is a snapshot taken at login and only a new session picks up the new claim. Auditing the docs also surfaced that Prometheus scrapes only keycloak, kubelet, node-exporter and itself, so the B-layer experiments have no metrics to screenshot rather than missing screenshots. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>	2026-09-04 16:18:33 +09:00
DongHyeonkaandClaude Opus 5	b5528fae87	docs: index all 23 experiments with what each measured One table per experiment with its branch and result, plus the nine injections that silently did nothing and the five predictions that turned out wrong. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>	2026-09-04 15:11:32 +09:00
DongHyeonkaandClaude Opus 5	4864d837f1	docs: D-4 — the certificate is fine and the renewal itself went untested Three SAN entries and no wildcard is the constraint that cost something real in B-7, where oauth2-proxy had to borrow Grafana's app2 hostname because a fourth name was not available. The served chain is four deep and verifies, so fullchain.pem is configured rather than the cert.pem mistake that only breaks clients without a cached intermediate. The forced renewal and the reload behaviour could not be measured because sudo on the host asks for a password, the same silent failure first noticed in B-7. nginx reload is graceful by design, but this lab has repeatedly shown that by design is not the same as measured, so it is recorded as untested rather than assumed. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>	2026-09-04 15:09:36 +09:00
DongHyeonkaandClaude Opus 5	027c24ee27	docs: D-3 — only RBAC actually hides anything Every secret in the lab prints in four commands, while kubectl describe shows just a byte count and creates the impression that something is hidden. k3s reports encryption at rest disabled and the plaintext password is present in state.db, so one node disk carries the whole cluster's secrets, and inside the pod they are ordinary environment variables visible to exec, /proc and crash dumps. The default service account cannot read secrets, which makes RBAC the one control doing real work here and the thing worth tightening. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>	2026-09-04 15:07:35 +09:00
DongHyeonkaandClaude Opus 5	df140ab218	docs: D-2 — rolling back the image does not roll back the schema Downgrading from 26.7.0 to 26.0 fails with liquibase ValidationFailedException on a changeset checksum, which is stricter than an unknown migration: the old version knows the changeset but its definition differs. The pod goes CrashLoopBackOff and never starts. The StatefulSet stopped the rollout at the first pod, so the other kept serving and the front door stayed at 200, which replica 1 would not have done. The failed start never touched the schema, so restoring the image was enough; had the migration already applied, the D-1 database restore would have been the only way back. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>	2026-09-04 15:05:36 +09:00
DongHyeonkaandClaude Opus 5	df5af95cb3	docs: D-1 — an empty database still answered 200 Dropping the schema left Keycloak serving realm metadata and JWKS from its Infinispan cache, so the front door stayed at 200 while only the paths that read the database failed. That is a different shape from A-2, where the connection itself broke and readiness pulled the pods out of the Service; here the connection is fine and the tables are simply gone, which the health check does not notice. Restoring the pg_dump took one second with zero errors and no pod restart, and the row counts matched the backup exactly, sessions included. The real RPO is the backup interval plus the synchronous_commit loss measured in A-3, and this dump sits in the host's /tmp, which is the same failure domain as the thing it protects. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>	2026-09-04 14:59:56 +09:00
DongHyeonkaandClaude Opus 5	6c310c93b7	docs: C-2 — nothing propagates because nobody implemented the receiving end Neither client had a backchannel logout URL and the BFF has no oidcLogout configuration, so the three candidate paths all answer 302, which is the authentication redirect rather than a handler. Setting the URL on the identity provider alone changed nothing: with a live session, logging the user out emptied the Keycloak side and left the Redis session untouched. Reachability is not the blocker here, since a Keycloak pod fetches the app's public URL with a 200, but that is a property of this tailnet split-DNS lab and is the assumption most likely to fail in production, where it fails silently. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>	2026-09-04 14:56:58 +09:00
DongHyeonkaandClaude Opus 5	e856e7af4d	docs: C-1 — killing the SSO session logs nobody out One user session carries a client session per application, so visiting the second app skips the login screen. Deleting the identity provider session leaves both application sessions untouched and both apps keep serving, because the identity provider, the application session and the access token each have their own lifetime. That inverts the B-2 finding: there the app session was cleared and the surviving SSO session let the user straight back in. Either way, clearing one side leaves the other. It also means an identity provider outage is a single point of failure for logging in, not for already-authenticated users, and the failure arrives late and all at once. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>	2026-09-04 14:49:36 +09:00
				`@@ -0,0 +1 @@`
				`[ 882ms] [ERROR] Failed to load resource: the server responded with a status of 401 () @ https://app2.hyeonworks.com/favicon.ico:0`
				`@@ -0,0 +1 @@`
				`[ 178ms] [ERROR] Failed to load resource: the server responded with a status of 401 () @ https://app2.hyeonworks.com/favicon.ico:0`
				`@@ -0,0 +1 @@`
				`[ 210ms] [ERROR] Failed to load resource: the server responded with a status of 401 () @ https://app2.hyeonworks.com/favicon.ico:0`
				`@@ -0,0 +1 @@`
				`[ 423ms] [ERROR] Failed to load resource: the server responded with a status of 401 () @ https://app2.hyeonworks.com/favicon.ico:0`
				`@@ -0,0 +1 @@`
				`[ 12202ms] [ERROR] Failed to load resource: the server responded with a status of 401 () @ https://app2.hyeonworks.com/favicon.ico:0`
				`@@ -0,0 +1 @@`
				`[ 451ms] [ERROR] Failed to load resource: the server responded with a status of 401 () @ https://app2.hyeonworks.com/favicon.ico:0`
				`@@ -0,0 +1 @@`
				- generic [active] [ref=f47e1]: "{ \"headers\" : { \"host\" : [ \"app2.hyeonworks.com\" ], \"user-agent\" : [ \"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/152.0.0.0 Safari/537.36\" ], \"accept\" : [ \"text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,/;q=0.8,application/signed-exchange;v=b3;q=0.7\" ], \"accept-encoding\" : [ \"gzip, deflate, br, zstd\" ], \"accept-language\" : [ \"en-US,en;q=0.9\" ], \"cookie\" : [ \"grafana_session=60c3e7ae41ffc00665f4a2c377def399; grafana_session_expiry=1788497124; _oauth2_proxy=djIuWDI5aGRYUm9NbDl3Y205NGVTMDJZakF5T0dFM01HWTJPV000WmpCa1lUazVOalpsWWpNMk9UY3laR1ptTWcuWmpUamNTbGxVSHV1RmJjQ2ZRd2lsUQ==\|1788500797\|17Hbo3RDtzOldnLZx2xOt3e34lHo_v0yqRNdqdKUx-g=\" ], \"priority\" : [ \"u=0, i\" ], \"sec-ch-ua\" : [ \"\\\"Chromium\\\";v=\\\"152\\\", \\\"Not?A_Brand\\\";v=\\\"24\\\", \\\"Google Chrome\\\";v=\\\"152\\\"\" ], \"sec-ch-ua-mobile\" : [ \"?0\" ], \"sec-ch-ua-platform\" : [ \"\\\"Linux\\\"\" ], \"sec-fetch-dest\" : [ \"document\" ], \"sec-fetch-mode\" : [ \"navigate\" ], \"sec-fetch-site\" : [ \"none\" ], \"sec-fetch-user\" : [ \"?1\" ], \"upgrade-insecure-requests\" : [ \"1\" ], \"x-forwarded-email\" : [ \"labuser@example.com\" ], \"x-forwarded-host\" : [ \"app2.hyeonworks.com\" ], \"x-forwarded-port\" : [ \"443\" ], \"x-forwarded-preferred-username\" : [ \"labuser\" ], \"x-forwarded-proto\" : [ \"https\" ], \"x-forwarded-server\" : [ \"traefik-5d6fcf895-wpfhr\" ], \"x-forwarded-user\" : [ \"27df5ea9-8703-4ec5-badd-d972c583e1ff\" ], \"x-real-ip\" : [ \"100.123.124.30\" ] }, \"remoteAddr\" : \"100.123.124.30\", \"localAddr\" : \"10.42.0.53\", \"scheme\" : \"https\", \"secure\" : true, \"serverName\" : \"app2.hyeonworks.com\", \"serverPort\" : 443, \"requestUrl\" : \"https://app2.hyeonworks.com/api/echo\" }"
				`@@ -0,0 +1 @@`
				`- generic [active] [ref=f48e1]: "{\"pattern\":\"AP3-backend-for-frontend\",\"principal\":\"labuser\",\"accessTokenStoredOnServer\":true,\"refreshTokenStoredOnServer\":true,\"browserTokenCount\":0,\"csrfProtectionEnabled\":true}"`
				`@@ -0,0 +1 @@`
				- generic [active] [ref=f49e1]: "{ \"headers\" : { \"host\" : [ \"app2.hyeonworks.com\" ], \"user-agent\" : [ \"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/152.0.0.0 Safari/537.36\" ], \"accept\" : [ \"text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,/;q=0.8,application/signed-exchange;v=b3;q=0.7\" ], \"accept-encoding\" : [ \"gzip, deflate, br, zstd\" ], \"accept-language\" : [ \"en-US,en;q=0.9\" ], \"cookie\" : [ \"grafana_session=60c3e7ae41ffc00665f4a2c377def399; grafana_session_expiry=1788497124; _oauth2_proxy=djIuWDI5aGRYUm9NbDl3Y205NGVTMDJZakF5T0dFM01HWTJPV000WmpCa1lUazVOalpsWWpNMk9UY3laR1ptTWcuWmpUamNTbGxVSHV1RmJjQ2ZRd2lsUQ==\|1788500797\|17Hbo3RDtzOldnLZx2xOt3e34lHo_v0yqRNdqdKUx-g=\" ], \"priority\" : [ \"u=0, i\" ], \"sec-ch-ua\" : [ \"\\\"Chromium\\\";v=\\\"152\\\", \\\"Not?A_Brand\\\";v=\\\"24\\\", \\\"Google Chrome\\\";v=\\\"152\\\"\" ], \"sec-ch-ua-mobile\" : [ \"?0\" ], \"sec-ch-ua-platform\" : [ \"\\\"Linux\\\"\" ], \"sec-fetch-dest\" : [ \"document\" ], \"sec-fetch-mode\" : [ \"navigate\" ], \"sec-fetch-site\" : [ \"none\" ], \"sec-fetch-user\" : [ \"?1\" ], \"upgrade-insecure-requests\" : [ \"1\" ], \"x-forwarded-email\" : [ \"labuser@example.com\" ], \"x-forwarded-host\" : [ \"app2.hyeonworks.com\" ], \"x-forwarded-port\" : [ \"443\" ], \"x-forwarded-preferred-username\" : [ \"labuser\" ], \"x-forwarded-proto\" : [ \"https\" ], \"x-forwarded-server\" : [ \"traefik-5d6fcf895-wpfhr\" ], \"x-forwarded-user\" : [ \"27df5ea9-8703-4ec5-badd-d972c583e1ff\" ], \"x-real-ip\" : [ \"100.123.124.30\" ] }, \"remoteAddr\" : \"100.123.124.30\", \"localAddr\" : \"10.42.0.53\", \"scheme\" : \"https\", \"secure\" : true, \"serverName\" : \"app2.hyeonworks.com\", \"serverPort\" : 443, \"requestUrl\" : \"https://app2.hyeonworks.com/api/echo\" }"