deployment-mongo.yml

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name:  mongo-persistent-storage
spec:
  accessModes:
    - ReadWriteOnce
  volumeMode: Filesystem
  resources:
    requests:
      storage: 1Gi
#---
#apiVersion: storage.k8s.io/v1
#kind: StorageClass
#metadata:
#  name: demo
#provisioner: microk8s.io/hostpath
#reclaimPolicy: Delete
#volumeBindingMode: Immediate
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: mongodb
  labels:
    appdb: mongodb
spec:
#  serviceName: "mongo"
  replicas: 1
  strategy:
    type: Recreate
  selector:
    matchLabels:
      appdb: mongodb
  template:
    metadata:
      labels:
        appdb: mongodb
    spec:
      containers:
        - name: mongodb
          image: mongo:3.6.6
          resources:
            requests:
              memory: "128Mi"
              cpu: "50m"
            limits:
              memory: "256Mi"
              cpu: "100m"
          ports:
            - containerPort: 27017
          volumeMounts:
            - name: mongo-persistent-storage
              mountPath: /data/db
      restartPolicy: Always
      volumes:
        - name: mongo-persistent-storage
          persistentVolumeClaim:
            claimName: mongo-persistent-storage
---
apiVersion: v1
kind: Service
metadata:
  name: mongodb
  labels:
    app: mongodb
spec:
  ports:
  - port: 27017
    targetPort: 27017
  clusterIP: None
  selector:
    appdb: mongodb