docs: A-8 — a rolling restart keeps every session and drops only the cache

Nine samples through the restart all returned 200, the refresh token issued beforehand still works, and the session count is unchanged at 151 while both caches reset to zero. The updated last_session_refresh proves the write path recovered too, not just the response code. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
2026-09-04 13:20:56 +09:00
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+=== [3] 재시작 전 발급한 refresh token 이 아직 통하는가 ===
+  대상 sid: XLcgQWRiJrTkuNZcJsNeT_2j
+  keycloak-0 에서 refresh  HTTP 200
+
+=== [4] DB 에 그 세션이 남아 있는가 ===
+     user_session_id      | created_on | last_session_refresh 
+--------------------------+------------+----------------------
+ XLcgQWRiJrTkuNZcJsNeT_2j | 1788495513 |           1788495577
+(1 row)
+
+  전체 온라인 세션: 151 (재시작 전 151)
+
+=== [5] 캐시는 어떻게 되었는가 ===
+  keycloak-0  sessions 캐시 0.0 건 / cluster_size 2.0
+  keycloak-1  sessions 캐시 1.0 건 / cluster_size 2.0
+
+=== [6] 파드 나이 — 정말 재시작되었나 ===
+keycloak-0                  1/1   Running   0     44s
+keycloak-1                  1/1   Running   0     66s