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monitoring: Alerting vorbereitet - Alertmanager, 6 Alert-Regeln, Matrix-Receiver (gitops#32)

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Regeln decken die real erlebten Fehlerklassen ab: TargetDown (coturn-Klasse),
KubePodRestartLoop (36k-Restarts-Klasse), OOM-Kills, RAM-/Swap-/Disk-Druck.
Zustellung in den wartung-Raum ueber einen minimalen Stdlib-Webhook-Receiver
(gleiche Machart wie maintenance-notify, gitops Issue #24); Bot-Token kommt
beim Deploy per .env (Vorlage in .env.example).

UNGETESTET/DEPLOY-PENDING: promtool/amtool-Lint auf dem Mac an haengendem
Docker-Hub-Pull gescheitert - vor dem Deploy auf CFGMON ausfuehren (Images
liegen dort bereits):
  docker run --rm -v $PWD/monitoring/prometheus:/cfg:ro --entrypoint promtool prom/prometheus:v3.3.1 check rules /cfg/alerts.yml
  docker run --rm -v $PWD/monitoring/alertmanager:/cfg:ro --entrypoint amtool prom/alertmanager:v0.28.1 check-config /cfg/alertmanager.yml

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
This commit is contained in:
Thore Cimbal
2026-07-31 18:30:40 +02:00
co-authored by Claude Fable 5
parent b067c93677
commit 9594ec80ec
6 changed files with 155 additions and 0 deletions
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monitoring/.env.example
+7
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@@ -2,3 +2,10 @@
# Werte in Single-Quotes, damit Sonderzeichen shell-safe sind.
GRAFANA_ADMIN_USER='admin'
GRAFANA_ADMIN_PASSWORD='changeme'
# Alerting (gitops#32) - Matrix-Zustellung in den wartung-Raum.
# Token erzeugen: kubectl exec -n matrix deploy/matrix-stack-matrix-authentication-service -- \
# mas-cli manage issue-compatibility-token maintenance-notify
MATRIX_ALERT_HOMESERVER=https://matrix.axion1337.chat
MATRIX_ALERT_ROOM_ID=!lmZaajvVboTPxQxXzv:axion1337.chat
MATRIX_ALERT_TOKEN=changeme