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Add k8s Gitea deployment (migration target for git.unkin.net) (#309)

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Stand up the git.unkin.net forge on k8s to replace the Puppet VM. Deployed HA-shaped to match what the VM already runs (multi-replica on shared storage + external DB/cache), so this is genuine multi-replica HA rather than single-replica failover. Serves a temporary git2.k8s.syd1.au.unkin.net host; the git.unkin.net cutover is staged in docs/gitea-migration.md.

- add apps/base/gitea: namespace, CNPG gitea-postgres (2 instances, S3 backup bucket cnpg-gitea, nightly 04:00/30d), pgbouncer pooler, standalone Valkey (session/cache/queue, AOF), VaultAuth + VaultStaticSecrets, Gateway + HTTPRoute
- add apps/overlays/au-syd1/gitea: official Gitea chart 12.6.0 (app 1.26.2, rootless, 2 replicas) via helm-through-kustomize; RWX CephFS repo storage, external CNPG + Valkey, Actions disabled, container registry disabled (moved to artifactapi), Authentik OIDC with auto-register/account-linking; SSH via LoadBalancer VIP 198.18.200.10:2222
- register gitea in the platform ApplicationSet + AppProject
- add docs/gitea-migration.md staged cutover plan (VM Postgres->CNPG dump/restore, DNS in main.unkin.net zone, consumer checklist, rollback)

Depends on: terraform-authentik gitea OIDC app, and terraform-artifactapi ^gitea/ dockerhub allowlist (both separate PRs). One-time Vault seeds are listed in the migration doc.

Reviewed-on: #309
Co-authored-by: Ben Vincent <ben@unkin.net>
Co-committed-by: Ben Vincent <ben@unkin.net>
This commit was merged in pull request #309.
This commit is contained in:
Ben Vincent
2026-07-31 20:03:43 +10:00
committed by BenVincent
parent 6a13ca758a
commit a04dcc2975
19 changed files with 949 additions and 0 deletions
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docs/README.md
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@@ -7,3 +7,4 @@ Operational notes for the manifests in this repo.
| [cnpg-backups.md](cnpg-backups.md) | How CNPG Postgres backups (WAL archiving + nightly base backups) to Ceph RGW are configured. |
| [cnpg-restore.md](cnpg-restore.md) | Restoring a CNPG cluster: full recovery, point-in-time recovery, cutover, and gotchas. |
| [authentik-rancher-sso.md](authentik-rancher-sso.md) | Manual runtime step to point Rancher's OIDC auth at the canonical `identity.unkin.net` issuer and trust the internal CA. |
| [gitea-migration.md](gitea-migration.md) | Staged cutover of the git.unkin.net forge from the Puppet VM to the `gitea` namespace. |