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type, description, tags, timestamp
type description tags timestamp
reference Grafana visualizes the metrics that Prometheus collects from every service.
infrastructure
grafana
2026-09-11

Grafana

Grafana visualizes the metrics that Prometheus collects from every service. It runs on Dankclaw and is reachable at grafana.franksdank.cloud (via Caddy, behind the Anubis challenge + embedded-outpost gate; login happens inside Grafana via the Authentik OAuth2 button).

Host: Dankclaw — Hostname: grafana.franksdank.cloud — Port: 3002 (internal) — Docs: https://grafana.com/docs

Facts

Item Value
Image docker.io/grafana/grafana:latest
Published 127.0.0.1:3002 → 3000, loopback only (see Observability → Exposure)
Unit dankclaw/observability/quadlet/grafana.container → grafana.service
Data /opt/grafana/data — grafana.db: accounts, sessions, anything created in the UI
Provisioning mount /opt/grafana/provisioning (read-only) — empty as of 2026-09-11
Datasource none configured — see the state note in Observability

Configuration

Everything comes from the Quadlet unit. The Authentik OAuth2 client secret is the only credential, and systemd expands it from a per-service env file:

[Service]
EnvironmentFile=/home/dank/Containers/grafana/env      # systemd-side only
[Container]
Environment=GF_AUTH_GENERIC_OAUTH_CLIENT_SECRET=${GRAFANA_OAUTH_CLIENT_SECRET}

seed_grafana_env in scripts/deploy-remote.sh seeds that file from dankclaw/.env with a single-variable filter and fails the deploy when the value is missing. The container receives the one expanded value, never the file.

Datasource

None is configured. Grafana cannot query anything yet; pointing it at http://prometheus:9090 and http://loki:3100 (by container name, on the dankclaw_default network) is outstanding work — see the state note in Observability.

Healthcheck

Grafana responds on /api/health with 200 and "database":"ok".

Gotchas

  • Change the default admin credentials at first boot (env or UI).
  • Dashboards provisioned as YAML survive container recreation; UI-created ones live in the data volume — back it up.
  • Auth = OAuth2 relying-party, not auth_proxy. The embedded outpost carries no provider token (token=None), so no identity header ever reaches Grafana; RP mode is topology-independent. The full verified contract (provider pk 9, client_id grafana-21ca190cde75d60f, global authorize/token/userinfo paths, Basic client auth, form-encoded token body, and the fork's userinfo-claims bug that leaves identity at the sub hash only) is in Authentik → "OAuth2 relying-party quirks". Consequences for Grafana: users auto-upsert as Viewer with login = <sub hex>; no email/groups/role claims reach Grafana until the evaluator bug is fixed — do not write role mappings that depend on those claims. The local admin account stays the only Admin.
  • Never point this unit's EnvironmentFile at the repo-root .env. That file is a gluetun env file and it carries HOME=/root; systemd imports it for the service, podman then looks for its configuration under /root, cannot read it, and the unit dies at start with stat /root/.config: permission denied. The unit reads /home/dank/Containers/grafana/env, which the deployer seeds with exactly one variable.

See Also