feat: Observability Stack — Prometheus + Grafana + Loki + Tempo + Alerting + Uptime Kuma#499
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…rting + Uptime Kuma - Prometheus v2.54.1: scrape configs for cadvisor, node-exporter, traefik, grafana, alertmanager, uptime-kuma - Grafana v11.2.2: OIDC auth (Authentik), auto-provisioned datasources + dashboard provider - Loki v3.2.0 + Promtail v3.2.0: Docker container log discovery + syslog collection - Tempo v2.6.0: OTLP HTTP/GRPgC receiver, Tempo → Prometheus metric generator - Alertmanager v0.27.0: routes to ntfy webhook (critical/warning/default) - cAdvisor v0.50.0 + Node Exporter v1.8.2: container + host metrics - Uptime Kuma v1.23.15: public status page at status. - Alert rules: host (CPU/mem/disk/IO), containers (restart/OOM/health), services (5xx/latency) - grafana-import-dashboards.sh: imports 5 dashboards from Grafana.com - uptime-kuma-setup.sh: monitor setup guide - .env.example with retention config
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Summary
Closes #10
Services (10 total, all with healthchecks)
homelab-admins→Admin,homelab-users→Viewer), auto-provisioned datasources + dashboard providerLOKI_RETENTION)status.${DOMAIN}Alert Rules (9 rules across 3 groups)
Pre-provisioned Dashboards
grafana-import-dashboards.shimports: Node Exporter Full (1860), Docker Container (179), Traefik (17346), Loki (13639), Uptime Kuma (18278)Scripts
scripts/grafana-import-dashboards.sh— imports 5 dashboards from Grafana.comscripts/uptime-kuma-setup.sh— monitor setup guide with service listGenerated/reviewed with: claude-opus-4-6