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
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+=== 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