Files
oikos/knowledge/wiki/containers/106-auth-outpost.md
dtoro 4efddb8bed docs: fix pre-existing broken links surfaced by docs-lint
Problem: docs-lint (added in the wiki-hq reorg) surfaced 126 broken relative
links that predated this session — a container rename, incident/plan docs
that moved into archive/done subfolders without their inbound links being
updated, and a handful of relative-depth bugs in files nested under
containers/archive/ and plans/done/.

Fixes applied, by category:
- 124-authentik.md -> 106-auth-outpost.md (container was renamed; ~40 refs).
- investigations/{2026-04-21-hubris-crash-loop,2026-05-31-authentik-vps-migration}.md
  -> archive/ prefix (both moved to investigations/archive/ previously).
- plans/{2026-06-01-slate-ax-to-sodola-migration,2026-06-04_130000-deprecate-claudio-bot,
  2026-06-25-yuvomi-deployment}.md -> plans/done/ prefix.
- Depth bugs in files nested one level deeper than their siblings assumed
  (investigations/archive/*, knowledge/wiki/containers/archive/*,
  plans/done/*) — corrected relative-path depth.
- Destroyed containers with no surviving page (126-plato) delinked to the
  containers/index.md archaeology row instead of a 404.
- ludo-mini.yaml -> strong.yaml (host was renamed, same physical machine).
- netbird-vps.md (no narrative page exists) -> netbird-vps.yaml (substrate
  record, matching the existing convention for hosts without a wiki page).
- runbook-dpkg-interrupted.md refs -> .agents/skills/runbook-dpkg-interrupted/SKILL.md
  (missed in the phase-4 runbook move because the referencing files used a
  bare filename, not a runbooks/ prefix).
- One dangling forward-reference to a never-written investigation delinked
  to the actual incident record it was describing.

Left alone: two links in knowledge/wiki/containers/101-jellyfin.md into
devops/homelab-authentik-admin/ — an intentional reference to a sibling repo,
not present in this checkout.

Verification: broken-link count 126 -> 2 (real remainder is the cross-repo
reference above); gen-topology.py --check still exit 0; build_host_files.py
still idempotent; all inventory.yaml doc_page targets still resolve.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
2026-07-06 17:53:35 +02:00

5.0 KiB

106 — auth-outpost

Authentik forward-auth outpost for LAN-gated apps. A stateless proxy that connects outbound to the VPS Authentik core and serves forward-auth locally, so Caddy (121) never hairpins auth through VPS Traefik.

At a glance

  • Hostname: auth-outpost
  • IP: 192.168.8.6 (static)
  • Privilege: privileged (Docker-in-LXC, features: nesting=1)
  • Resources: 1 core / 512 MiB / 4 GiB rootfs
  • Mounts: none
  • Created: 2026-06-01, Debian 13, replacing the embedded outpost on 124

Role

Runs one container — ghcr.io/goauthentik/proxy — that opens an outbound websocket to https://auth.hubris.network (the VPS core), pulls its proxy-provider config, and answers Caddy's forward_auth subrequests on 192.168.8.6:9000 (LAN-only bind). Because the call path is Caddy → outpost (LAN), with no Traefik in between, X-Forwarded-Host is preserved — the failure that 404s when Caddy is pointed at https://auth.hubris.network directly (Traefik rewrites the header). See the migration investigation.

Service / port map

Service Listen Notes
authentik proxy outpost 192.168.8.6:9000 /outpost.goauthentik.io/* (ping, auth/caddy)

Config paths

  • /opt/authentik-outpost/docker-compose.ymlghcr.io/goauthentik/proxy:2026.5.2, AUTHENTIK_HOST=https://auth.hubris.network, AUTHENTIK_INSECURE=false, port bound 192.168.8.6:9000.
  • /opt/authentik-outpost/.env (mode 600, untracked) — AUTHENTIK_TOKEN for outpost hubris-lan-outpost (sops-encrypt into secrets/ — TODO Phase 5).

The outpost object (VPS Authentik)

  • Outpost hubris-lan-outpost (type proxy), providers: hubris-forward-auth (domain, Paperless + domain-level apps), Provider for Torrent (qBittorrent), Provider for Artifacto (single).
  • Health: VPS admin → Applications → Outposts → last-seen current; curl http://192.168.8.6:9000/outpost.goauthentik.io/ping204; container log Successfully connected websocket.

Caddy wiring

Caddy (121) (authentik) snippet reverse_proxy/forward_authhttp://192.168.8.6:9000 (was 192.168.8.180:9000 on LXC 124). Tracked in dtoro/caddy-conf.

sso.hubris.network — the callback domain (critical)

Domain-level (forward_domain) providers redirect the browser to {external_host}/outpost.goauthentik.io/callback after login. On LXC 124 that external_host was auth.hubris.network, which resolved (LAN) to Caddy → the 124 outpost — same box, so it worked. Post-migration auth.hubris.network points to the VPS core, so the callback hit the wrong outpost → 400 / redirect-uri mismatch.

Fix: the LAN outpost gets its own domain.

  • DNS: sso.hubris.network → 192.168.8.175 (Caddy). (in dnsmasq today — must be carried into Technitium in DNS Phase 2.)
  • Caddy: site sso.hubris.network { tls dns ionos; reverse_proxy 192.168.8.6:9000 } (in caddy-conf).
  • Authentik: hubris-forward-auth and Provider for Torrent have external_host=https://sso.hubris.network; their redirect_uris must match (set_oauth_defaults() regenerates them from external_host — changing external_host alone does NOT update them).
  • Provider for Artifacto is forward_single on its own domain, so it was unaffected.

Lesson: when the IdP core and the forward-auth outpost live on different hosts, the outpost needs a dedicated domain distinct from the core's — and proxy-provider redirect_uris must be regenerated, not just external_host.

Changelog

2026-06-06 — Authentik session lifetime extended to 30 days

VPS Authentik core user_login stage updated: session_duration changed from seconds=0 (session cookie, cleared on browser close) to days=30 (persistent 30-day cookie). Also set AUTHENTIK_SESSIONS__UNAUTHENTICATED_AGE=days=30 in /opt/authentik.env on the VPS. See investigation.

2026-06-01 — created; forward-auth cut over from LXC 124

New dedicated LXC for the LAN forward-auth outpost (Phase 1 of the architecture migration). Deployed goauthentik/proxy:2026.5.2 pointed at the VPS core; repointed Caddy (authentik) from 192.168.8.180:9000192.168.8.6:9000. Verified Paperless/qBittorrent/Artifacto return the SSO redirect with 124-Authentik stopped, confirming the frozen instance is out of the path. dnsmasq stays on 124 until DNS is relocated.