Fix forward-auth middleware address for hostNetwork Traefik (#137) - #181
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Traefik runs hostNetwork: true, so its forwardAuth client resolves DNS via gandalf's host resolver (Tailscale MagicDNS), which returns NXDOMAIN for *.svc.cluster.local -- the in-cluster outpost address 500'd the gate. Point the middleware at the external authentik.vigihome.net host (resolvable from the host resolver, LE-valid cert) and hairpin back through Traefik to the embedded outpost. forward_domain selects the app from the forwarded host, so one external address serves every protected host.
This was referenced Jun 27, 2026
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Hotfix for the #137 cutover. The gate 500'd because Traefik runs
hostNetwork: trueand resolves DNS via gandalf's host resolver (Tailscale MagicDNS100.100.100.100), which returns NXDOMAIN forauthentik-server.auth.svc.cluster.local.Root cause (from Traefik logs):
Error calling http://authentik-server.auth.svc.cluster.local/... : lookup ... no such host. Verified with a hostNetwork DNS probe: the cluster name → NXDOMAIN, butauthentik.vigihome.net→ gandalf.Fix: point the forwardAuth address at
https://authentik.vigihome.net/outpost.goauthentik.io/auth/traefik(resolvable from the host resolver, LE-valid cert) and hairpin back through Traefik to the embedded outpost. Inforward_domainmode the outpost selects the app from the forwarded host (trustForwardHeader), so one external address serves every protected host. No Ansible/Traefik-chart change;allowCrossNamespacestays off.Verification of the live gate (302 / member-load / forged-header) follows after merge + reconcile.