apiVersion: v1
kind: Namespace
metadata:
  name: m5-counter
---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: counter
  namespace: m5-counter
automountServiceAccountToken: false
---
apiVersion: v1
kind: ConfigMap
metadata:
  name: counter-config
  namespace: m5-counter
data:
  MESSAGE: theory-counter
---
apiVersion: v1
kind: Secret
metadata:
  name: counter-secret
  namespace: m5-counter
type: Opaque
stringData:
  token: replace-before-use
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: counter-data
  namespace: m5-counter
spec:
  accessModes: [ReadWriteOnce]
  resources:
    requests:
      storage: 1Gi
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: counter
  namespace: m5-counter
spec:
  replicas: 1
  strategy:
    type: Recreate
  selector:
    matchLabels:
      app: m5-counter
  template:
    metadata:
      labels:
        app: m5-counter
    spec:
      serviceAccountName: counter
      automountServiceAccountToken: false
      terminationGracePeriodSeconds: 15
      securityContext:
        runAsNonRoot: true
        runAsUser: 10001
        runAsGroup: 10001
        fsGroup: 10001
      containers:
        - name: counter
          image: registry.example.invalid/m5-counter:replace-with-published-tag
          imagePullPolicy: IfNotPresent
          ports:
            - name: http
              containerPort: 8080
          env:
            - name: MESSAGE
              valueFrom:
                configMapKeyRef:
                  name: counter-config
                  key: MESSAGE
          resources:
            requests:
              cpu: 100m
              memory: 64Mi
            limits:
              cpu: 500m
              memory: 128Mi
          securityContext:
            allowPrivilegeEscalation: false
            readOnlyRootFilesystem: true
            capabilities:
              drop: [ALL]
            seccompProfile:
              type: RuntimeDefault
          startupProbe:
            httpGet:
              path: /live
              port: http
            periodSeconds: 2
            failureThreshold: 30
          readinessProbe:
            httpGet:
              path: /ready
              port: http
            periodSeconds: 5
          livenessProbe:
            httpGet:
              path: /live
              port: http
            periodSeconds: 10
          volumeMounts:
            - name: data
              mountPath: /data
            - name: secret
              mountPath: /run/secrets
              readOnly: true
      volumes:
        - name: data
          persistentVolumeClaim:
            claimName: counter-data
        - name: secret
          secret:
            secretName: counter-secret
            defaultMode: 0444
---
apiVersion: v1
kind: Service
metadata:
  name: counter
  namespace: m5-counter
spec:
  type: ClusterIP
  selector:
    app: m5-counter
  ports:
    - name: http
      port: 80
      targetPort: http
---
apiVersion: rbac.authorization.k8s.io/v1
kind: Role
metadata:
  name: counter-observer
  namespace: m5-counter
rules:
  - apiGroups: [""]
    resources: [pods, events, services, endpoints, persistentvolumeclaims]
    verbs: [get, list, watch]
  - apiGroups: [""]
    resources: [pods/log]
    verbs: [get]
  - apiGroups: [apps]
    resources: [deployments, replicasets]
    verbs: [get, list, watch]
  - apiGroups: [discovery.k8s.io]
    resources: [endpointslices]
    verbs: [get, list, watch]
---
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
  name: counter-observer
  namespace: m5-counter
subjects:
  - kind: Group
    name: m5-counter-observers
    apiGroup: rbac.authorization.k8s.io
roleRef:
  kind: Role
  name: counter-observer
  apiGroup: rbac.authorization.k8s.io