Add identity.unkin.net internal DNS record

identity.unkin.net was configured as the Authentik OIDC issuer but has no DNS
record anywhere, so in-cluster OIDC discovery (e.g. argocd-server) fails to
resolve it. Add an authoritative A record via the bind-operator so the
internal bind system serves it.

- New DNSRecord identity-dns-internal -> 198.18.200.4 (traefik-internal VIP,
  where the authentik Gateway serves the identity.unkin.net hostname).
- Placed in the bind-internal namespace alongside the unkin-net BindZone: the
  operator resolves zoneRef/clusterRef/updateKeyRef within the record's own
  namespace, so it cannot live in the app namespace.
- "internal" in the name distinguishes it from the external DNS Authentik will
  manage its own records from later.

apps/base/bind-internal/authoritative/kustomization.yaml

@@ -6,4 +6,5 @@ resources:
   - cluster.yaml
   - tsigkey.yaml
   - zones.yaml
+  - records.yaml
   - acls.yaml

apps/base/bind-internal/authoritative/records.yaml

@@ -0,0 +1,21 @@
+# Individually-managed authoritative records for the unkin.net zone.
+# DNSRecords must live in the same namespace as their BindZone (the operator
+# resolves zoneRef/clusterRef/updateKeyRef within the record's namespace), so
+# these sit alongside the zone in bind-internal, not in the app namespace.
+---
+apiVersion: bind.unkin.net/v1alpha1
+kind: DNSRecord
+metadata:
+  # "internal" in the name distinguishes this from the external DNS that
+  # Authentik will manage its own records from later.
+  name: identity-dns-internal
+  namespace: bind-internal
+spec:
+  zoneRef: unkin-net
+  name: identity
+  type: A
+  ttl: 600
+  values:
+    # traefik-internal gateway VIP; the authentik Gateway serves the
+    # identity.unkin.net hostname there.
+    - 198.18.200.4

apps/base/bind-internal/resolvers/cluster.yaml

@@ -21,6 +21,15 @@ spec:
   forwarders:
     - 8.8.8.8
     - 1.1.1.1
+  # The internal split-horizon zones are served UNSIGNED by the in-cluster
+  # authoritative, but their public parents publish DS records (e.g. unkin.net
+  # is DNSSEC-signed on the Internet). With dnssec-validation on, the validator
+  # sees "parent indicates secure" but gets an insecure answer and returns
+  # SERVFAIL (broken trust chain). Treat the forwarded internal domains as
+  # insecure so they are not validated. unkin.net covers all *.unkin.net
+  # (incl. k8s.syd1.au.unkin.net); 18.198.in-addr.arpa covers every reverse zone.
+  extraOptions:
+    - "validate-except { unkin.net; 18.198.in-addr.arpa; consul; }"
   resources:
     requests:
       cpu: 20m

apps/base/bind-internal/tsig-api/tsig-api.yaml

@@ -13,7 +13,7 @@ metadata:
   name: bind-tsig-api
   namespace: bind-internal
 spec:
-  image: git.unkin.net/unkin/bind-tsig-api:v0.2.1
+  image: git.unkin.net/unkin/bind-tsig-api:v0.2.2
   replicas: 1
   port: 8443
   # targetNamespace defaults to this resource's namespace (bind-internal), where

apps/base/bind-system/deployment.yaml

@@ -21,7 +21,7 @@ spec:
         runAsNonRoot: true
       containers:
         - name: operator
-          image: git.unkin.net/unkin/bind-operator:v0.2.1
+          image: git.unkin.net/unkin/bind-operator:v0.2.2
           args:
             - --metrics-bind-address=:8080
             - --health-probe-bind-address=:8081

apps/base/bind-system/kustomization.yaml

@@ -6,6 +6,6 @@ resources:
   - namespace.yaml
   # CRDs are pulled from the bind-operator repo at the matching tag rather than
   # vendored here, so they never drift from the operator.
-  - https://git.unkin.net/unkin/bind-operator/raw/tag/v0.2.1/config/crd/install.yaml
+  - https://git.unkin.net/unkin/bind-operator/raw/tag/v0.2.2/config/crd/install.yaml
   - rbac.yaml
   - deployment.yaml

clusters/au-syd1/bootstrap/argocd-cm-patch.yaml

@@ -6,3 +6,20 @@ metadata:
   namespace: argocd
 data:
   kustomize.buildOptions: "--enable-helm"
+  # External URL ArgoCD serves on (TLS terminated at the traefik-internal gateway).
+  url: https://argocd.k8s.syd1.au.unkin.net
+  # OIDC login via Authentik. The client secret is seeded in Vault out of band
+  # and surfaced as the `argocd-oidc` Secret (labelled part-of=argocd) by VSO;
+  # `$argocd-oidc:client_secret` resolves the key from that Secret.
+  oidc.config: |
+    name: Authentik
+    issuer: https://identity.unkin.net/application/o/argocd/
+    clientID: argocd
+    clientSecret: $argocd-oidc:client_secret
+    requestedScopes:
+      - openid
+      - profile
+      - email
+    requestedIDTokenClaims:
+      groups:
+        essential: true

clusters/au-syd1/bootstrap/argocd-cmd-params-cm-patch.yaml

@@ -0,0 +1,10 @@
+---
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: argocd-cmd-params-cm
+  namespace: argocd
+data:
+  # argocd-server serves plain HTTP; TLS is terminated at the traefik-internal
+  # gateway in front of it. Required so the gateway can route to port 80.
+  server.insecure: "true"

clusters/au-syd1/bootstrap/argocd-oidc-vaultauth.yaml

@@ -0,0 +1,18 @@
+---
+apiVersion: secrets.hashicorp.com/v1beta1
+kind: VaultAuth
+metadata:
+  name: default
+  namespace: argocd
+spec:
+  method: kubernetes
+  mount: k8s/au/syd1
+  vaultConnectionRef: vso-system/default
+  allowedNamespaces:
+    - argocd
+  kubernetes:
+    role: default
+    serviceAccount: default
+    audiences:
+      - vault
+    tokenExpirationSeconds: 600

clusters/au-syd1/bootstrap/argocd-oidc-vaultstaticsecret.yaml

@@ -0,0 +1,23 @@
+---
+apiVersion: secrets.hashicorp.com/v1beta1
+kind: VaultStaticSecret
+metadata:
+  name: argocd-oidc
+  namespace: argocd
+spec:
+  vaultAuthRef: default
+  mount: kv
+  type: kv-v2
+  # Seeded out of band; same secret is read by terraform-authentik to configure
+  # the provider's client_secret. Key: client_secret.
+  path: kubernetes/namespace/argocd/default/oauth-credentials
+  refreshAfter: 5m
+  hmacSecretData: true
+  destination:
+    name: argocd-oidc
+    create: true
+    overwrite: true
+    # ArgoCD only resolves `$secret:key` references against Secrets carrying
+    # this label.
+    labels:
+      app.kubernetes.io/part-of: argocd

clusters/au-syd1/bootstrap/argocd-rbac-cm-patch.yaml

@@ -0,0 +1,14 @@
+---
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: argocd-rbac-cm
+  namespace: argocd
+data:
+  # Match RBAC subjects against the `groups` claim from Authentik.
+  scopes: "[groups]"
+  # Authenticated users with no matching group get read-only access.
+  policy.default: role:readonly
+  # Authentik group -> ArgoCD role.
+  policy.csv: |
+    g, argocd-admins, role:admin

clusters/au-syd1/bootstrap/argocd-server-gateway.yaml

@@ -0,0 +1,39 @@
+---
+apiVersion: gateway.networking.k8s.io/v1
+kind: Gateway
+metadata:
+  name: argocd-server
+  namespace: argocd
+  labels:
+    app.kubernetes.io/name: argocd-server
+    app.kubernetes.io/instance: argocd
+    traefik.io/instance: internal
+  annotations:
+    cert-manager.io/cluster-issuer: vault-issuer
+    cert-manager.io/common-name: argocd.k8s.syd1.au.unkin.net
+    cert-manager.io/private-key-size: "4096"
+    external-dns.alpha.kubernetes.io/hostname: argocd.k8s.syd1.au.unkin.net
+    external-dns.alpha.kubernetes.io/target: 198.18.200.4
+spec:
+  gatewayClassName: traefik-internal
+  listeners:
+    - name: http
+      port: 80
+      protocol: HTTP
+      hostname: argocd.k8s.syd1.au.unkin.net
+      allowedRoutes:
+        namespaces:
+          from: Same
+    - name: https
+      port: 443
+      protocol: HTTPS
+      hostname: argocd.k8s.syd1.au.unkin.net
+      allowedRoutes:
+        namespaces:
+          from: Same
+      tls:
+        mode: Terminate
+        certificateRefs:
+          - group: ""
+            kind: Secret
+            name: argocd-server-tls

clusters/au-syd1/bootstrap/argocd-server-httproute.yaml

@@ -0,0 +1,55 @@
+---
+apiVersion: gateway.networking.k8s.io/v1
+kind: HTTPRoute
+metadata:
+  name: argocd-server-http-redirect
+  namespace: argocd
+  labels:
+    app.kubernetes.io/name: argocd-server
+    app.kubernetes.io/instance: argocd
+spec:
+  hostnames:
+    - argocd.k8s.syd1.au.unkin.net
+  parentRefs:
+    - group: gateway.networking.k8s.io
+      kind: Gateway
+      name: argocd-server
+      sectionName: http
+  rules:
+    - filters:
+        - type: RequestRedirect
+          requestRedirect:
+            scheme: https
+            statusCode: 301
+      matches:
+        - path:
+            type: PathPrefix
+            value: /
+---
+apiVersion: gateway.networking.k8s.io/v1
+kind: HTTPRoute
+metadata:
+  name: argocd-server
+  namespace: argocd
+  labels:
+    app.kubernetes.io/name: argocd-server
+    app.kubernetes.io/instance: argocd
+spec:
+  hostnames:
+    - argocd.k8s.syd1.au.unkin.net
+  parentRefs:
+    - group: gateway.networking.k8s.io
+      kind: Gateway
+      name: argocd-server
+      sectionName: https
+  rules:
+    - backendRefs:
+        - group: ""
+          kind: Service
+          name: argocd-server
+          port: 80
+          weight: 1
+      matches:
+        - path:
+            type: PathPrefix
+            value: /

clusters/au-syd1/bootstrap/kustomization.yaml

@@ -7,12 +7,25 @@ resources:
   - https://artifactapi.k8s.syd1.au.unkin.net/api/v1/remote/github/kubernetes-sigs/gateway-api/releases/download/v1.5.1/standard-install.yaml
   - au-syd1-apps.yaml
   - argocd-self-app.yaml
+  # Authentik OIDC: expose argocd-server and wire the client secret from Vault.
+  - argocd-server-gateway.yaml
+  - argocd-server-httproute.yaml
+  - argocd-oidc-vaultauth.yaml
+  - argocd-oidc-vaultstaticsecret.yaml
 
 patches:
   - path: argocd-cm-patch.yaml
     target:
       kind: ConfigMap
       name: argocd-cm
+  - path: argocd-rbac-cm-patch.yaml
+    target:
+      kind: ConfigMap
+      name: argocd-rbac-cm
+  - path: argocd-cmd-params-cm-patch.yaml
+    target:
+      kind: ConfigMap
+      name: argocd-cmd-params-cm
   - path: argocd-tls-certs-patch.yaml
     target:
       kind: ConfigMap