feat(gitea): upgrade 1.27.3 -> 28.3.0

Gitea dropped the "1." prefix; 28.x is the successor of 1.27.
- image 28.3.0, update.range >=28.0.0 <29.0.0, Renovate ceiling <29.0.0
- drop GITEA__server__DOMAIN (no longer read in 28, ROOT_URL is the source)
- declare RUN_RETENTION_DAYS=400, EGRESS_MODE=lax (no allow list: the OIDC
  login source is not gated by the egress policy in 28.3.0), and
  DISABLE_REGISTRATION=true (28's new default)
- document autoRollbackOnFailedHealth as inert (no ImagePolicy is rendered);
  rollback is a PVC restore because the DB migration is one-way

Co-Authored-By: Claude Opus 5.5 <[email protected]>

apps/wave-0/gitea.yaml

@@ -78,7 +78,7 @@ spec:
     spec:
       containers:
       - name: gitea
-        image: gitea/gitea:1.27.3
+        image: gitea/gitea:28.3.0
         ports:
         - containerPort: 3000
         env:
@@ -89,14 +89,18 @@ spec:
             secretKeyRef:
               name: gitea-bootstrap
               key: secret-key
-        - name: GITEA__server__DOMAIN
-          value: gitea.${BASE_DOMAIN}
         - name: GITEA__server__ROOT_URL
           value: https://gitea.${BASE_DOMAIN}/
         - name: GITEA__actions__ENABLED
           value: 'true'
         - name: GITEA__actions__DEFAULT_ACTIONS_URL
           value: github
+        - name: GITEA__actions__RUN_RETENTION_DAYS
+          value: '400'
+        - name: GITEA__security__EGRESS_MODE
+          value: lax
+        - name: GITEA__service__DISABLE_REGISTRATION
+          value: 'true'
         - name: GITEA_ADMIN_USERNAME
           valueFrom:
             secretKeyRef:

catalog/gitea.yaml

@@ -10,7 +10,7 @@
 name: gitea
 kind: container
 source:
-  image: gitea/gitea:1.27.3     # pinned recent stable tag (R-UPD-01); update.range governs advancement
+  image: gitea/gitea:28.3.0     # pinned recent stable tag (R-UPD-01); update.range governs advancement
 # Headless-install bootstrap (formerly apps/gitea-bootstrap-patch.yaml; now first-class via the
 # ServiceDefinition env/envFrom/lifecycle fields, schema >=1.2.0). Gitea must come up INSTALLED
 # without the interactive web wizard and with a FIXED, persistent SECRET_KEY, so all of this is
@@ -23,14 +23,43 @@ env:
       secretKeyRef:
         name: gitea-bootstrap
         key: secret-key
-  - name: GITEA__server__DOMAIN              # correct public clone/redirect URLs for the TLS-terminated host
+  # ROOT_URL is the ONLY source of the instance domain since Gitea 28 (go-gitea/gitea#39400): [server]
-    value: gitea.${BASE_DOMAIN}
+  # DOMAIN is no longer read, and the SSH domain defaults from ROOT_URL too. GITEA__server__DOMAIN was
+  # removed in the 28 upgrade; the stale DOMAIN line environment-to-ini already wrote into app.ini is
+  # inert. Correct public clone/redirect URLs for the TLS-terminated host come from this one value.
   - name: GITEA__server__ROOT_URL
     value: https://gitea.${BASE_DOMAIN}/
   - name: GITEA__actions__ENABLED            # Phase 6 CI/CD: declared (not implicit upstream default) so the
     value: "true"                            # in-cluster act_runner (ns gitea-actions) registers against it
   - name: GITEA__actions__DEFAULT_ACTIONS_URL  # resolve `uses: <org>/<action>@ref` from github.com (cluster
     value: github                              # has internet egress; not air-gapped)
+  # Gitea 28 added run retention (go-gitea/gitea#38855): completed runs, with their jobs, logs and
+  # artifacts, are deleted by the cleanup_action_runs cron after RUN_RETENTION_DAYS. Upstream's default
+  # (400) is kept but DECLARED, so the deletion horizon is visible here rather than implicit. The spec
+  # repo states no CI-history retention requirement; 0 would mean keep forever.
+  - name: GITEA__actions__RUN_RETENTION_DAYS
+    value: "400"
+  # Gitea 28 (go-gitea/gitea#39426) puts webhooks, the OAuth2 avatar fetch and OpenID 2.0 behind an
+  # egress policy: in the default lax mode, PUBLIC targets are allowed and private/loopback/CGNAT
+  # targets need an IP or CIDR entry in [security] ALLOWED_HOST_LIST (a hostname entry is NOT enough
+  # for a private address). DECLARED lax with an EMPTY allow list, deliberately:
+  #   * the Keycloak OIDC login source is NOT gated by it. In 28.3.0 the openidConnect provider is
+  #     goth's, built with its default HTTP client (services/auth/source/oauth2/providers_openid.go);
+  #     egress.NewSecurityPolicy is used only by routers/web/auth/oauth.go (avatar fetch, and
+  #     [oauth2_client] UPDATE_AVATAR is off here) and modules/auth/openid (OpenID 2.0, unused).
+  #     So keycloak.<domain> resolving to the private Gateway address in-cluster does not matter.
+  #   * this instance has no webhooks and no mirrors (measured 2026-11-07), and 1.27 already refused
+  #     private webhook targets by default, so nothing that worked before is newly denied.
+  # Adding an entry here would only WIDEN the webhook SSRF surface. Add the narrowest CIDR (e.g. the
+  # Gateway address /32) only if a real private webhook target appears.
+  - name: GITEA__security__EGRESS_MODE
+    value: lax
+  # Gitea 28 (go-gitea/gitea#39400) disables LOCAL self-registration unless DISABLE_REGISTRATION is
+  # explicitly false; 1.27 defaulted it open. Declared true: accounts arrive via Keycloak only.
+  # OAuth2 auto-registration below is unaffected — routers/web/auth/oauth.go gates it on
+  # ALLOW_ONLY_INTERNAL_REGISTRATION and ENABLE_AUTO_REGISTRATION, not on DISABLE_REGISTRATION.
+  - name: GITEA__service__DISABLE_REGISTRATION
+    value: "true"
   - name: GITEA_ADMIN_USERNAME               # break-glass local admin creds (consumed by the postStart hook)
     valueFrom:
       secretKeyRef:
@@ -233,9 +262,14 @@ auth:
   # recovery tools (docs/15 "Availability caveat"). No secret is embedded here.
 update:
   channel: stable               # R-UPD-01
-  range: ">=1.22.0 <2.0.0"      # stay on the 1.x stable line
+  range: ">=28.0.0 <29.0.0"     # Gitea dropped the "1." prefix at 28.0.0 (successor of 1.27); stay on 28.x
   cadence: "0 4 * * *"
-  autoRollbackOnFailedHealth: true   # R-UPD-03
+  # R-UPD-03. INERT FOR THIS SERVICE, and it must stay that way: this flag renders only an annotation
+  # on a Flux ImagePolicy, and apps/ is rendered --no-image-automation (ci/render-golden.sh), so no
+  # ImagePolicy exists and the Deployment (strategy Recreate) is never auto-reverted. That matters
+  # because a Gitea upgrade (1.27 -> 28 included) MIGRATES THE SQLITE DB ONE-WAY: an image revert onto
+  # a migrated DB is not a rollback. Roll Gitea back by RESTORING THE DATA PVC from its pre-upgrade backup.
+  autoRollbackOnFailedHealth: true
 observability:
   metrics: true
   slis:

decisions/2026-11-07-gitea-28.md

@@ -0,0 +1,62 @@
+---
+date: 2026-11-07
+branch: feat/gitea-28
+title: "Gitea 1.27.3 -> 28.3.0 (upstream dropped the 1. prefix)"
+---
+
+## What changed
+
+- `catalog/gitea.yaml`: `source.image` `gitea/gitea:1.27.3` -> `gitea/gitea:28.3.0` (still the
+  newest stable tag on Docker Hub and GitHub on 2026-11-07: 28.0.0, 28.1.0, 28.2.0, 28.3.0).
+  `update.range` `">=1.22.0 <2.0.0"` -> `">=28.0.0 <29.0.0"`.
+- 28.x breaking changes handled in the env block:
+  - `GITEA__server__DOMAIN` **removed**: 28 no longer reads `[server] DOMAIN` (go-gitea/gitea#39400);
+    `ROOT_URL` was already set and is now the only source of the domain. Nothing else in the repo
+    reads the variable (the bootstrap script sets ROOT_URL/SSH_PORT only).
+  - `GITEA__actions__RUN_RETENTION_DAYS=400` **declared** (go-gitea/gitea#38855 added the 400-day
+    default; the spec repo states no CI-history retention requirement).
+  - `GITEA__security__EGRESS_MODE=lax` **declared, with no allow list.** Read from the 28.3.0
+    source: the Keycloak OIDC login source does NOT go through the new egress policy (goth's
+    openidConnect provider, default HTTP client). The policy covers webhooks, the OAuth2 avatar
+    fetch (`UPDATE_AVATAR` is off) and OpenID 2.0. A hostname entry would not even help for a
+    private address — `WithLocalNeedsIPAllow` requires an IP/CIDR entry. So the brief's
+    "Keycloak SSO breaks" premise does not hold for 28.3.0, and an allow-list entry would only
+    widen webhook SSRF reach.
+  - `GITEA__service__DISABLE_REGISTRATION=true` **declared** (28's new default; 1.27 defaulted it
+    open). OAuth2 auto-registration is gated separately and keeps working.
+- `update.autoRollbackOnFailedHealth`: kept `true`, commented as **inert**. It renders only an
+  annotation on a Flux ImagePolicy, and `apps/` is rendered `--no-image-automation`, so no
+  ImagePolicy exists. The Deployment is `Recreate` with no probes, so nothing reverts the image
+  automatically. Rollback = restore the PVC, never an image revert onto the migrated DB.
+- `apps/wave-0/gitea.yaml` re-rendered with the canonical command
+  (`render.py --all catalog -o apps --wave-layout --no-image-automation`, in the toolbox). Only
+  gitea changed.
+- `renovate.json5`: gitea `allowedVersions` `<2.0.0` -> `<29.0.0`; the description no longer calls
+  28.x a stale tag.
+
+## What I verified
+
+- Docker Hub tag list and GitHub tags: 28.3.0 is the newest 28.x stable tag.
+- Read the v28.3.0 source: `modules/egress/policy/policy.go`, `modules/egress/policies.go`, every
+  `egress.New*` caller, `services/auth/source/oauth2/providers_openid.go`,
+  `modules/setting/{security,actions,service}.go`, `routers/web/auth/{oauth,linkaccount}.go`,
+  `cmd/admin_user_list.go`, `cmd/admin_auth*.go`, the Dockerfile, and `docker/root` (the s6 setup
+  still runs `environment-to-ini`). The postStart hook's CLI is unchanged in 28.3.0: `admin user
+  list --admin` still has Username in column 2, `admin auth list` still has ID/Name in columns 1/2,
+  `add-oauth`/`update-oauth` keep the same flags, and curl and su-exec are still in the image.
+- Live Gitea (API, 2026-11-07): version 1.27.3. Zero repo, org and system webhooks, no mirrors.
+- `renovate-config-validator` at 44.167.0 (the tag renovate.yaml pins): "Config validated
+  successfully".
+- Ran the toolbox gate on the committed tree (numbers are in the PR).
+
+## What I did NOT verify
+
+- **The upgrade itself.** Nothing booted 28.3.0 against a copy of the production DB. Migration
+  time, migration success and the post-upgrade SSO login are all UNVERIFIED, and the PR's
+  post-merge checklist covers them.
+- **The age of the latest gitea-data Longhorn/off-cluster backup.** The cluster read failed from
+  the worktree (no k3s-prod context with the kubeconfig available), so the operator must confirm
+  it before merging.
+- How the Envoy Gateway handles the new `/-/ws` WebSocket. If upgrades are not forwarded, live
+  notifications fall back to polling (not breaking). UNVERIFIED.
+- Whether the L2/L3 conformance suite passes. It does not run in CI.

renovate.json5

@@ -316,9 +316,9 @@
       "enabled": false
     },
     {
-      "description": "ADDED 2026-10-30. MIRRORS catalog/<svc>.yaml `update.range` — the operator's declared per-service policy (schemas/servicedefinition.schema.json), which Renovate does not read. Without it the dry run proposed gitea 28.2.0, qbittorrent 20.04.1 (both stale/odd tags, not real successors), radarr 6.x and nextcloud 35 (four majors past 31; Nextcloud cannot skip majors). KEEP IN STEP with the catalog ranges.",
+      "description": "ADDED 2026-10-30. MIRRORS catalog/<svc>.yaml `update.range` — the operator's declared per-service policy (schemas/servicedefinition.schema.json), which Renovate does not read. Without it the dry run proposed gitea 28.2.0, qbittorrent 20.04.1 (the qbittorrent tag is a stale/odd one, not a real successor; gitea 28.x IS the real successor of 1.27 — upstream dropped the \"1.\" prefix at 28.0.0 — and the catalog moved to it on 2026-11-07, so the gitea ceiling is now <29.0.0: 28.x patches/minors are proposed, never auto-merged per the blast-radius rule, and 29 waits for a human), radarr 6.x and nextcloud 35 (four majors past 31; Nextcloud cannot skip majors). KEEP IN STEP with the catalog ranges.",
       "matchPackageNames": ["gitea/gitea"],
-      "allowedVersions": "<2.0.0"
+      "allowedVersions": "<29.0.0"
     },
     { "matchPackageNames": ["nextcloud"], "allowedVersions": "<32.0.0" },
     { "matchPackageNames": ["lscr.io/linuxserver/qbittorrent"], "allowedVersions": "<6.0.0" },