Deploy pangolin-kube-controller for Pangolin access policies

Add pangolin-kube-controller deployment to enable Pangolin-based access
policies for Kubernetes ingress resources.

Controller configuration:
- Image: ghcr.io/fosrl/pangolin-kube-controller:0.1.0-alpha.1
- API endpoint: https://pangolin.basicstack.de/api/v1/traefik-config
- Target namespace: pangolin
- Polling interval: 15s
- Leader election: disabled (single replica)

Includes:
- ServiceAccount for controller pod
- ClusterRole with required RBAC permissions for Traefik CRDs
- Deployment with proper security context and resource limits
- Service for metrics endpoint (:9090)

Related: DEV-437

Co-Authored-By: Paperclip <noreply@paperclip.ing>

apps/pangolin/controller/controller-deployment.yaml

@@ -0,0 +1,103 @@
+---
+# Pangolin Kube Controller Deployment
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: pangolin-kube-controller
+  namespace: pangolin
+  labels:
+    app.kubernetes.io/name: pangolin-kube-controller
+    app.kubernetes.io/component: controller
+    app.kubernetes.io/part-of: pangolin
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app.kubernetes.io/name: pangolin-kube-controller
+  template:
+    metadata:
+      labels:
+        app.kubernetes.io/name: pangolin-kube-controller
+        app.kubernetes.io/component: controller
+        app.kubernetes.io/part-of: pangolin
+    spec:
+      serviceAccountName: pangolin-kube-controller
+      securityContext:
+        runAsNonRoot: true
+        runAsUser: 65532
+        fsGroup: 65532
+        seccompProfile:
+          type: RuntimeDefault
+      containers:
+      - name: controller
+        image: ghcr.io/fosrl/pangolin-kube-controller:0.1.0-alpha.1
+        imagePullPolicy: IfNotPresent
+        securityContext:
+          allowPrivilegeEscalation: false
+          readOnlyRootFilesystem: true
+          runAsNonRoot: true
+          runAsUser: 65532
+          capabilities:
+            drop:
+              - ALL
+        env:
+          # Pangolin API Configuration
+          - name: CONFIG_ENDPOINT
+            value: "https://pangolin.basicstack.de/api/v1/traefik-config"
+          - name: CONFIG_AUTH_HEADER
+            value: "Bearer 5qid06u9j325kpk.ywd3bpsx34dtxyczgatyxuoxkzwhie7d72k6v4hw"
+
+          # Target namespace for Traefik resources
+          - name: TARGET_NAMESPACE
+            value: "pangolin"
+
+          # Metrics server configuration
+          - name: METRICS_ADDR
+            value: ":9090"
+
+          # Polling interval
+          - name: POLL_INTERVAL
+            value: "15s"
+
+          # Leader election (disabled for single replica)
+          - name: ENABLE_LEADER_ELECTION
+            value: "false"
+
+          # Traefik ingress class
+          - name: INGRESS_CLASS
+            value: "traefik"
+
+          # Logging configuration
+          - name: LOG_TRAEFIK_CONFIG
+            value: "false"
+          - name: CONFIG_LOG_PREVIEW
+            value: "false"
+          - name: FETCH_LOG_INTERVAL
+            value: "5m"
+        ports:
+        - name: metrics
+          containerPort: 9090
+          protocol: TCP
+        livenessProbe:
+          httpGet:
+            path: /livez
+            port: 9090
+          initialDelaySeconds: 15
+          periodSeconds: 20
+          timeoutSeconds: 5
+          failureThreshold: 3
+        readinessProbe:
+          httpGet:
+            path: /readyz
+            port: 9090
+          initialDelaySeconds: 10
+          periodSeconds: 10
+          timeoutSeconds: 5
+          failureThreshold: 3
+        resources:
+          requests:
+            memory: "64Mi"
+            cpu: "50m"
+          limits:
+            memory: "256Mi"
+            cpu: "200m"

apps/pangolin/controller/controller-rbac.yaml

@@ -0,0 +1,59 @@
+---
+# ClusterRole for pangolin-kube-controller
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRole
+metadata:
+  name: pangolin-kube-controller
+  labels:
+    app.kubernetes.io/name: pangolin-kube-controller
+    app.kubernetes.io/component: controller
+    app.kubernetes.io/part-of: pangolin
+rules:
+  # Traefik CRDs - full access to manage IngressRoutes, Middlewares, and TraefikServices
+  - apiGroups: ["traefik.io"]
+    resources:
+      - ingressroutes
+      - ingressroutetcps
+      - ingressrouteudps
+      - middlewares
+      - middlewaretcps
+      - traefikservices
+      - serverstransports
+      - serverstransporttcps
+      - tlsoptions
+      - tlsstores
+    verbs: ["get", "list", "watch", "create", "update", "patch", "delete"]
+
+  # IngressClass - read-only for validation
+  - apiGroups: ["networking.k8s.io"]
+    resources: ["ingressclasses"]
+    verbs: ["get", "list", "watch"]
+
+  # Leader election - requires lease access
+  - apiGroups: ["coordination.k8s.io"]
+    resources: ["leases"]
+    verbs: ["get", "list", "watch", "create", "update", "patch"]
+
+  # Events - for operational notifications
+  - apiGroups: [""]
+    resources: ["events"]
+    verbs: ["create", "patch", "get", "list"]
+
+---
+# ClusterRoleBinding for pangolin-kube-controller
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRoleBinding
+metadata:
+  name: pangolin-kube-controller
+  labels:
+    app.kubernetes.io/name: pangolin-kube-controller
+    app.kubernetes.io/component: controller
+    app.kubernetes.io/part-of: pangolin
+subjects:
+  - kind: ServiceAccount
+    name: pangolin-kube-controller
+    namespace: pangolin
+roleRef:
+  kind: ClusterRole
+  name: pangolin-kube-controller
+  apiGroup: rbac.authorization.k8s.io

apps/pangolin/controller/controller-service.yaml

@@ -0,0 +1,20 @@
+---
+# Service for pangolin-kube-controller metrics
+apiVersion: v1
+kind: Service
+metadata:
+  name: pangolin-kube-controller
+  namespace: pangolin
+  labels:
+    app.kubernetes.io/name: pangolin-kube-controller
+    app.kubernetes.io/component: controller
+    app.kubernetes.io/part-of: pangolin
+spec:
+  type: ClusterIP
+  selector:
+    app.kubernetes.io/name: pangolin-kube-controller
+  ports:
+  - name: metrics
+    port: 9090
+    targetPort: 9090
+    protocol: TCP

apps/pangolin/controller/controller-serviceaccount.yaml

@@ -0,0 +1,11 @@
+---
+# ServiceAccount for pangolin-kube-controller
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: pangolin-kube-controller
+  namespace: pangolin
+  labels:
+    app.kubernetes.io/name: pangolin-kube-controller
+    app.kubernetes.io/component: controller
+    app.kubernetes.io/part-of: pangolin