Drop git.unkin.net from k8s gitea gateway and routes (#518)

git.unkin.net is served by the VM haproxy during the forge migration. Claiming it on the k8s gitea Gateway/HTTPRoutes competes with that path, so the k8s gitea serves only its admin name until cutover.

- remove git.unkin.net from the gitea HTTPRoute and redirect route hostnames
- remove the http-primary/https-primary listeners and their parentRefs
- set the gateway cert common-name to git.k8s.syd1.au.unkin.net

Reviewed-on: #518
Co-authored-by: unkin-agent <unkin-agent@unkin.net>
Co-committed-by: unkin-agent <unkin-agent@unkin.net>

apps/base/gitea/gateway.yaml

@@ -1,11 +1,6 @@
 ---
-# HTTPS front for the k8s Gitea, served on two names:
-#   git.unkin.net              — canonical/production (apex, bind-operator zone;
-#                                DNS flip is the gated cutover step, see the doc)
-#   git.k8s.syd1.au.unkin.net  — admin/backup route (external-dns k8s.syd1 zone),
-#                                same dual-name pattern as identity.unkin.net.
-# The cert-manager Certificate (vault-issuer) takes CN git.unkin.net and gets a
-# DNS SAN for each TLS listener hostname automatically.
+# HTTPS front for the k8s Gitea on git.k8s.syd1.au.unkin.net (external-dns
+# k8s.syd1 zone). git.unkin.net stays on the VM haproxy until cutover.
 apiVersion: gateway.networking.k8s.io/v1
 kind: Gateway
 metadata:
@@ -17,36 +12,13 @@ metadata:
     traefik.io/instance: internal
   annotations:
     cert-manager.io/cluster-issuer: vault-issuer
-    cert-manager.io/common-name: git.unkin.net
+    cert-manager.io/common-name: git.k8s.syd1.au.unkin.net
     cert-manager.io/private-key-size: "4096"
-    # Only the k8s admin route is published by external-dns (it owns just the
-    # k8s.syd1.au.unkin.net zone). git.unkin.net lives in the apex zone and is
-    # flipped at cutover — NOT managed here.
     external-dns.alpha.kubernetes.io/hostname: git.k8s.syd1.au.unkin.net
     external-dns.alpha.kubernetes.io/target: 198.18.200.4
 spec:
   gatewayClassName: traefik-internal
   listeners:
-    - name: http-primary
-      port: 80
-      protocol: HTTP
-      hostname: git.unkin.net
-      allowedRoutes:
-        namespaces:
-          from: Same
-    - name: https-primary
-      port: 443
-      protocol: HTTPS
-      hostname: git.unkin.net
-      allowedRoutes:
-        namespaces:
-          from: Same
-      tls:
-        mode: Terminate
-        certificateRefs:
-          - group: ""
-            kind: Secret
-            name: gitea-tls
     - name: http-admin
       port: 80
       protocol: HTTP

apps/base/gitea/httproute.yaml

@@ -9,13 +9,8 @@ metadata:
     app.kubernetes.io/instance: gitea
 spec:
   hostnames:
-    - git.unkin.net
     - git.k8s.syd1.au.unkin.net
   parentRefs:
-    - group: gateway.networking.k8s.io
-      kind: Gateway
-      name: gitea
-      sectionName: http-primary
     - group: gateway.networking.k8s.io
       kind: Gateway
       name: gitea
@@ -41,13 +36,8 @@ metadata:
     app.kubernetes.io/instance: gitea
 spec:
   hostnames:
-    - git.unkin.net
     - git.k8s.syd1.au.unkin.net
   parentRefs:
-    - group: gateway.networking.k8s.io
-      kind: Gateway
-      name: gitea
-      sectionName: https-primary
     - group: gateway.networking.k8s.io
       kind: Gateway
       name: gitea