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docs: correct the places where documents contradicted their own evidence

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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>
This commit is contained in:
DongHyeonka
2026-09-04 16:35:49 +09:00
co-authored by Claude Opus 5
parent 78b270559c
commit e0d27d47ce
32 changed files with 678 additions and 16 deletions
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docs/experiment-a2-database-loss.md
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@@ -103,12 +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.**
@@ -272,6 +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