Manifest.yml

---
apiVersion: v1
kind: PersistentVolume
metadata:
  name: mongo-pv
spec:
  capacity:
    storage: 1Gi
  accessModes:
    - ReadWriteOnce
  persistentVolumeReclaimPolicy: Retain
  hostPath:
    path: /home/ubuntu/mongo/mongo-vol

---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: mongo-pvc
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 1Gi

---
apiVersion: v1
kind: Secret
metadata:
  name: mongodb-secret
type: Opaque
data:
  username: YWRtaW4=
  password: MTIz

---
apiVersion: v1
kind: Secret
metadata:
  name: mongo-express-secret
type: Opaque
data:
  mduser: YWRtaW4=
  mdpass: MTIz
  meuser: YWRtaW4=
  mepass: MTIz

---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: mongodb
  labels:
    app: mongodb
spec:
  replicas: 1
  selector:
    matchLabels:
      app: mongodb
  template:
    metadata:
      labels:
        app: mongodb
    spec:
      containers:
        - name: mongodb
          image: mongo
          ports:
            - containerPort: 27017
          env:
            - name: MONGO_INITDB_ROOT_USERNAME
              valueFrom:
                secretKeyRef:
                  name: mongodb-secret
                  key: username
            - name: MONGO_INITDB_ROOT_PASSWORD
              valueFrom:
                secretKeyRef:
                  name: mongodb-secret
                  key: password
          volumeMounts:
            - name: mongo-data
              mountPath: /data/db
      volumes:
        - name: mongo-data
          persistentVolumeClaim:
            claimName: mongo-pvc

---
apiVersion: v1
kind: Service
metadata:
  name: mongodb-service
spec:
  selector:
    app: mongodb
  ports:
    - protocol: TCP
      port: 27017
      targetPort: 27017

---
apiVersion: v1
kind: ConfigMap
metadata:
  name: mongodb-configmap
data:
  db_host: mongodb-service

---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: mongo-express
  labels:
    app: mongo-express
spec:
  replicas: 1
  selector:
    matchLabels:
      app: mongo-express
  template:
    metadata:
      labels:
        app: mongo-express
    spec:
      containers:
        - name: mongo-express
          image: mongo-express
          ports:
            - containerPort: 8081
          env:
            - name: ME_CONFIG_BASICAUTH_USERNAME
              valueFrom:
                secretKeyRef:
                  name: mongo-express-secret
                  key: meuser
            - name: ME_CONFIG_BASICAUTH_PASSWORD
              valueFrom:
                secretKeyRef:
                  name: mongo-express-secret
                  key: mepass
            - name: ME_CONFIG_MONGODB_ADMINUSERNAME
              valueFrom:
                secretKeyRef:
                  name: mongodb-secret
                  key: username
            - name: ME_CONFIG_MONGODB_ADMINPASSWORD
              valueFrom:
                secretKeyRef:
                  name: mongodb-secret
                  key: password
            - name: ME_CONFIG_MONGODB_SERVER
              valueFrom:
                configMapKeyRef:
                  name: mongodb-configmap
                  key: db_host

---
apiVersion: v1
kind: Service
metadata:
  name: mongo-express-service
spec:
  selector:
    app: mongo-express
  type: NodePort
  ports:
    - protocol: TCP
      port: 8081
      targetPort: 8081