== R-518 measure, demo-hp guest 9201, controller 0.295.0, 2026-10-05: POST /api/guest-backup/trigger (the button's call) at 09:19:05Z
2026/10/05 09:19:07 backup_handlers.go:349: [INFO] [web] manual whole-guest backup triggered (quiesce loop)
2026/10/05 09:19:07 quiesce.go:427: [INFO] [quiesce] manual backup requested — quiescing now
2026/10/05 09:19:08 quiesce.go:517: [INFO] [quiesce] backup due on 2 tier(s) — quiescing 9 stack(s): [adventurelog bentopdf bookstack calibre-web docmost kimai opengist paperless-ngx privatebin]
2026/10/05 09:19:29 quiesce.go:566: [INFO] [quiesce] tier local: backup job backup-9201-1791191969558324187 started — polling
2026/10/05 09:23:44 quiesce.go:210: [INFO] [quiesce] a backup cycle is already running — skipping this scheduled check
2026/10/05 09:24:09 quiesce.go:643: [INFO] [quiesce] tier local: backup job backup-9201-1791191969558324187 done — next tier may start (app still quiesced)
2026/10/05 09:24:09 quiesce.go:307: [INFO] [quiesce] tier felhom-pbs is BUSY — the agent refused the backup because a concurrent heavy operation holds it. This is contention, NOT a failure: the tier stays due and retries in 15m0s (contended for 0s)
2026/10/05 09:24:09 quiesce.go:504: [INFO] [quiesce] unquiescing (last tier is busy — deferring to a later cycle): restarting 9 stack(s)
-- container StartedAt after the backup (the apps the quiesce stopped):
2026-10-05T09:24:10.019684173Z adventurelog-postgres
2026-10-05T09:24:10.200085281Z adventurelog-frontend
2026-10-05T09:24:15.705236204Z adventurelog
2026-10-05T09:24:16.331987016Z bentopdf
2026-10-05T09:24:16.974996127Z bookstack-db
2026-10-05T09:24:22.669660366Z bookstack
2026-10-05T09:24:23.521923837Z calibre-web
2026-10-05T09:24:24.437773353Z docmost-postgres
2026-10-05T09:24:24.631250114Z docmost-redis
2026-10-05T09:24:35.395095325Z docmost
2026-10-05T09:24:36.934564476Z kimai-db
2026-10-05T09:24:42.753714563Z kimai
2026-10-05T09:24:43.466405175Z opengist
2026-10-05T09:24:44.478064534Z paperless-redis
2026-10-05T09:24:44.688668856Z paperless-postgres
2026-10-05T09:24:54.928089575Z paperless-webserver
2026-10-05T09:24:55.739635651Z privatebin
RESULT: stop began 09:19:08Z (9 stacks quiesced), local tier 09:19:29-09:24:09, PBS tier BUSY (skipped, retried later), last app back 09:24:55Z => longest stop 5 min 47 s, shortest ~5 min 02 s. 21/21 containers running afterwards.
