web-app.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: webapp-deployment
  namespace: ns1
  labels:
    app: webapp
spec:
  selector:
    matchLabels:
      app: webapp
  replicas: 1
  strategy:
    rollingUpdate:
      maxSurge: 25%
      maxUnavailable: 25%
    type: RollingUpdate
  template:
    metadata:
      labels:
        app: webapp
    spec:
      
      containers:
      - name: mongo-express
        image:  mongo-express:latest
        ports: 
        - containerPort: 8081
        env:
        - name:  ME_CONFIG_MONGODB_ADMINUSERNAME
          valueFrom:
            secretKeyRef:
              name: mongo-secret
              key: mongo-user
              
        - name:  ME_CONFIG_MONGODB_ADMINPASSWORD
          valueFrom:
            secretKeyRef:
              name: mongo-secret
              key: mongo-password
    
        - name:  ME_CONFIG_MONGODB_SERVER
          valueFrom:
            configMapKeyRef:
              name: mongo-config
              key: mongo-url

---

apiVersion: v1 
kind: Service
metadata:
  name: webapp-service

spec:
  type: NodePort
  selector:
    app: webapp

  ports:
    - protocol: TCP
      port: 8081
      targetPort: 8081
      nodePort: 30200