home-network-k3s-impl/apps/wave-1/keycloak.yaml

---
# Namespace (trust zone; default-deny + policies apply)
apiVersion: v1
kind: Namespace
metadata:
  name: keycloak
  labels:
    homelab.keithjackson.dev/app-namespace: 'true'
    gateway-access: shared
  annotations:
    homelab.keithjackson.dev/backup-policy: daily-offcluster
---
# Default-deny baseline (R-NET-01): deny all, allow only DNS
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: default-deny
  namespace: keycloak
  labels:
    homelab.keithjackson.dev/baseline: default-deny
spec:
  podSelector: {}
  policyTypes:
  - Ingress
  - Egress
  ingress: []
  egress:
  - to:
    - namespaceSelector:
        matchLabels:
          kubernetes.io/metadata.name: kube-system
    ports:
    - protocol: UDP
      port: 53
    - protocol: TCP
      port: 53
---
# PVC keycloak-db (R-STATE)
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: keycloak-db
  namespace: keycloak
  labels:
    app.kubernetes.io/name: keycloak
spec:
  accessModes:
  - ReadWriteOnce
  storageClassName: longhorn
  resources:
    requests:
      storage: 10Gi
---
# Deployment (R-PLAT-02)
apiVersion: apps/v1
kind: Deployment
metadata:
  name: keycloak
  namespace: keycloak
  labels:
    app.kubernetes.io/name: keycloak
spec:
  replicas: 1
  strategy:
    type: Recreate
  selector:
    matchLabels:
      app.kubernetes.io/name: keycloak
  template:
    metadata:
      labels:
        app.kubernetes.io/name: keycloak
        homelab.keithjackson.dev/egress-class: internet
        homelab.keithjackson.dev/auth-mode: native
    spec:
      containers:
      - name: keycloak
        image: quay.io/keycloak/keycloak:26.0.6
        ports:
        - containerPort: 8080
        volumeMounts:
        - name: db
          mountPath: /data/db
      volumes:
      - name: db
        persistentVolumeClaim:
          claimName: keycloak-db
---
# Service
apiVersion: v1
kind: Service
metadata:
  name: keycloak
  namespace: keycloak
  labels:
    app.kubernetes.io/name: keycloak
spec:
  selector:
    app.kubernetes.io/name: keycloak
  ports:
  - name: port-8080
    port: 8080
    targetPort: 8080
---
# CiliumNetworkPolicy egress allow (R-NET-02): keycloak-allow-keycloak-db-5432
apiVersion: cilium.io/v2
kind: CiliumNetworkPolicy
metadata:
  name: keycloak-allow-keycloak-db-5432
  namespace: keycloak
  labels:
    app.kubernetes.io/name: keycloak
spec:
  endpointSelector:
    matchLabels:
      app.kubernetes.io/name: keycloak
  egress:
  - toEndpoints:
    - matchLabels:
        app.kubernetes.io/name: keycloak-db
        k8s:io.kubernetes.pod.namespace: keycloak-db
    toPorts:
    - ports:
      - port: '5432'
        protocol: TCP
---
# CiliumNetworkPolicy gateway-ingress allow (R-NET-01/02): keycloak-allow-gateway-ingress
apiVersion: cilium.io/v2
kind: CiliumNetworkPolicy
metadata:
  name: keycloak-allow-gateway-ingress
  namespace: keycloak
  labels:
    app.kubernetes.io/name: keycloak
spec:
  endpointSelector:
    matchLabels:
      app.kubernetes.io/name: keycloak
  ingress:
  - fromEntities:
    - ingress
    toPorts:
    - ports:
      - port: '8080'
        protocol: TCP
---
# CiliumNetworkPolicy world egress allow (egress class governs the path; R-NET-05): keycloak-allow-internet-egress
apiVersion: cilium.io/v2
kind: CiliumNetworkPolicy
metadata:
  name: keycloak-allow-internet-egress
  namespace: keycloak
  labels:
    app.kubernetes.io/name: keycloak
spec:
  endpointSelector:
    matchLabels:
      app.kubernetes.io/name: keycloak
  egress:
  - toEntities:
    - world
---
# HTTPRoute keycloak-8080 (R-TLS/R-DNS)
apiVersion: gateway.networking.k8s.io/v1
kind: HTTPRoute
metadata:
  name: keycloak-8080
  namespace: keycloak
  labels:
    app.kubernetes.io/name: keycloak
spec:
  parentRefs:
  - name: shared
    namespace: gateway
    sectionName: https
  hostnames:
  - keycloak.${BASE_DOMAIN}
  rules:
  - matches:
    - path:
        type: PathPrefix
        value: /
    backendRefs:
    - name: keycloak
      port: 8080
---
# PrometheusRule SLI alerts (R-OBS-01)
apiVersion: monitoring.coreos.com/v1
kind: PrometheusRule
metadata:
  name: keycloak-slis
  namespace: keycloak
  labels:
    release: kube-prometheus-stack
    app.kubernetes.io/name: keycloak
spec:
  groups:
  - name: keycloak.slis
    rules:
    - alert: keycloak-down
      expr: kube_statefulset_status_replicas_ready{namespace="keycloak", statefulset="keycloak"} == 0 or absent(kube_statefulset_status_replicas_ready{namespace="keycloak", statefulset="keycloak"})
      for: 5m
      labels:
        severity: critical
        service: keycloak
      annotations:
        summary: keycloak is down
        description: 'keycloak: its StatefulSet has no available/ready replica for 5m, or the signal is gone entirely (SLI: up, via kube_statefulset_status_replicas_ready).'