k8s-deployment.yml

apiVersion: v1
kind: Namespace
metadata:
  name: docker-demo-ENVIRONMENT
---
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  namespace: docker-demo-ENVIRONMENT
  name: docker-demo-storage-ENVIRONMENT
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 250Mi
---
apiVersion: v1
kind: Secret
metadata:
  name: mysecret
  namespace: docker-demo-ENVIRONMENT
type: Opaque
data:
  username: ZGVtbw==
  password: ZGVtbw==
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: app
  namespace: docker-demo-ENVIRONMENT
spec:
  replicas: 4
  selector:
    matchLabels:
      app: app
  template:
    metadata:
      labels:
        app: app
    spec:
      containers:
        - name: app
          image: DTR_URL/demo/docker-demo:TAG
          imagePullPolicy: Always
          volumeMounts:
            - name: mysecret
              mountPath: "/etc/mysecrets"
              readOnly: true
          env:
            - name: TITLE
              value: "Docker Demo-ENVIRONMENT on k8s"
            - name: DB_HOST
              value: "db"
            - name: DB_PORT
              value: "5432"
            - name: DB_SSL_MODE
              value: "disable"
            - name: SECRET_DIR
              value: "/etc/mysecrets"
          ports:
            - containerPort: 8080
      volumes:
        - name: mysecret
          secret:
            secretName: mysecret
            defaultMode: 0644
            items:
              - key: username
                path: DB_USER
              - key: password
                path: DB_PASS
      nodeSelector:
        beta.kubernetes.io/os: linux
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: db
  namespace: docker-demo-ENVIRONMENT
spec:
  replicas: 1
  selector:
    matchLabels:
      app: db
  template:
    metadata:
      labels:
        app: db
    spec:
      containers:
        - name: db
          image: DTR_URL/official/postgres:latest
          imagePullPolicy: Always
          volumeMounts:
            - name: mysecret
              mountPath: "/etc/mysecrets"
              readOnly: true
            - name: postgres-data
              mountPath: /var/lib/postgresql/data
          env:
            - name: POSTGRES_USER_FILE
              value: "/etc/mysecrets/username"
            - name: POSTGRES_PASSWORD_FILE
              value: "/etc/mysecrets/password"
          ports:
            - containerPort: 5432
      volumes:
        - name: mysecret
          secret:
            secretName: mysecret
            defaultMode: 0644
        - name: postgres-data
          persistentVolumeClaim:
            claimName: docker-demo-storage-ENVIRONMENT
      nodeSelector:
        beta.kubernetes.io/os: linux
---
apiVersion: v1
kind: Service
metadata:
  name: app
  namespace: docker-demo-ENVIRONMENT
spec:
  selector:
    app: app
  ports:
  - protocol: TCP
    port: 8080
    targetPort: 8080
---
apiVersion: v1
kind: Service
metadata:
  name: db
  namespace: docker-demo-ENVIRONMENT
spec:
  selector:
    app: db
  ports:
  - protocol: TCP
    port: 5432
    targetPort: 5432
---
apiVersion: networking.k8s.io/v1beta1
kind: Ingress
metadata:
  namespace: docker-demo-ENVIRONMENT
  name: docker-demo-ENVIRONMENT-ingress
spec:
  rules:
  - host: docker-demo-ENVIRONMENT-k8s.DOMAIN_NAME
    http:
      paths:
      - path: /
        backend:
          serviceName: app
          servicePort: 8080