**Fix-forward companion to the #457 rollback. This is NOT the current outage fix — see below.**
## The actual outage
The UI is 503 because the Authentik application slug `artifactapi` **does not exist**. OIDC discovery 404s, so oauth2-proxy exits at startup, the Service has no ready endpoints, and Traefik answers `no available server`.
```
identity.unkin.net /application/o/artifactapi/… 404
identity.k8s.syd1.au.unkin.net /application/o/artifactapi/… 404
identity.unkin.net /application/o/repospawner/… 200
identity.unkin.net /application/o/argocd/… 200
```
Root cause is upstream in **terraform-authentik**: `ci/woodpecker/push/apply` on main HEAD `4e16401` **failed**. That apply has to succeed before any argocd-apps change can help. **This PR does not fix that.**
## What this PR does fix
#456 dropped the `combine-certs` initContainer and `OAUTH2_PROXY_PROVIDER_CA_FILES`, reasoning that `identity.unkin.net` serves a publicly trusted Let's Encrypt cert and so needs no internal CA. That holds for the browser redirect but not for oauth2-proxy's own back-channel discovery/token calls.
artifactapi is the **only one of six** oauth2-proxies in the estate without it:
| app | issuer host | `PROVIDER_CA_FILES` |
|---|---|---|
| arrproxy | identity.unkin.net | yes |
| logviewer | identity.unkin.net | yes |
| mediamark | identity.unkin.net | yes |
| repospawner | identity.unkin.net | yes |
| watchstate | identity.k8s… | yes |
| **artifactapi** | identity.unkin.net | **no** |
repospawner uses the **same public `identity.unkin.net` issuer** and still needs the internal bundle, which falsifies the removal reasoning. The existing comment on that initContainer states it plainly: *"The Authentik issuer is served behind the internal unkin.net CA."*
## Changes
- Add the `combine-certs` initContainer — byte-identical to repospawner's.
- Mount the combined bundle and set `OAUTH2_PROXY_PROVIDER_CA_FILES`.
- Reload the Deployment when `vault-ca-cert` rotates.
`vault-ca-cert` already exists in the `artifactapi` namespace (`api-deployment.yaml` uses it). `kustomize build apps/base/artifactapi` succeeds.
## Risk
Trust-only and strictly additive — it appends the internal CA to the system roots. Harmless if the back channel turns out to reach a publicly trusted endpoint after all. Expected to remove the *next* blocker, surfacing as x509, once the terraform-authentik apply lands.
## Sequencing
1. Fix and re-run terraform-authentik `push/apply` so the `artifactapi` application exists.
2. Merge this.
3. Confirm `/ui/` returns 200, then close#457 unmerged.
Only merge #457 instead if the UI must come back before step 1 can be done.
Reviewed-on: #458
Co-authored-by: unkin-agent <unkin-agent@unkin.net>
Co-committed-by: unkin-agent <unkin-agent@unkin.net>
unkin-agent
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