mongoexpress-deployment.yaml

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_MONGODB_ADMINUSERNAME
            valueFrom: 
              secretKeyRef:
                name: mongodb-secret 
                key: mongo-root-username 
          - name: ME_CONFIG_MONGODB_ADMINPASSWORD
            valueFrom: 
              secretKeyRef:
                name: mongodb-secret 
                key: mongo-root-password 
          - name: ME_CONFIG_MONGODB_SERVER
            valueFrom: 
              configMapKeyRef:
                name: mongodb-configmap
                key: database_url

---
apiVersion: v1 
kind: Service  
metadata:
  name: mongo-express-service
spec:
  selector:
    app: mongo-express
  type: LoadBalancer
  ports:
    - protocol: TCP
      port: 8081
      targetPort: 8081
      nodePort: 30000