title: Kubernetes: ERR_NAME_NOT_RESOLVED
body: <p>I have deployed a mongo db, Spring Boot BE, Angular app within GKE. My FE service is a load balancer, it needs to connect with my BE to get data but I'm getting an console error in my browser: <strong>GET <a href="http://contactbe.default.svc.cluster.local/contacts" rel="nofollow noreferrer">http://contactbe.default.svc.cluster.local/contacts</a> net::ERR_NAME_NOT_RESOLVED</strong>. My FE needs to consume <em>/contacts</em> endpoint to get data. I'm using DNS from my BE service (contactbe.default.svc.cluster.local) within my Angular app. It is my yml file that I used to create my deployment:</p>
  
  <pre><code>apiVersion: v1
  kind: Service
  metadata:
    name: mongo
    labels:
      run: mongo
  spec:
    type: NodePort
    ports:
    - port: 27017
      targetPort: 27017
      protocol: TCP
    selector:
      run: mongo
  ---
  apiVersion: apps/v1beta1
  kind: Deployment
  metadata: 
    name: mongo
  spec:
    template:
      metadata:
        labels:
          run: mongo
      spec:
        containers:
        - name: mongo
          image: mongo
          ports:
          - containerPort: 27017
  ---        
  apiVersion: v1
  kind: Service
  metadata:
    name: contactbe
    labels:
      app: contactbe
  spec:
    type: NodePort 
    ports:
    - port: 8181
      targetPort: 8181
      protocol: TCP
    selector:
      app: contactbe
  ---
  apiVersion: apps/v1beta1
  kind: Deployment
  metadata: 
    name: contactbe
  spec:
    template:
      metadata:
        labels:
          app: contactbe
      spec:
        containers:
        - name: contactbe
          image: glgelopfalcon/k8s_contactbe:latest
          ports:
          - containerPort: 8181
  ---
  apiVersion: apps/v1beta1 # for versions before 1.9.0 use apps/v1beta2 
  kind: Deployment 
  metadata: 
    name: angular-deployment 
  spec: 
    selector: 
      matchLabels: 
        app: angular 
    replicas: 2 # tells deployment to run 2 pods matching the template 
    template: 
      metadata: 
        labels: 
          app: angular 
      spec: 
        containers: 
        - name: angular 
          image: glgelopfalcon/my-angular-app:latest 
          ports: 
          - containerPort: 80
  --- 
  # https://kubernetes.io/docs/concepts/services-networking/service/#defining-a-service  
  kind: Service 
  apiVersion: v1 
  metadata: 
    name: angular-service 
  spec: 
    selector: 
      app: angular 
    ports: 
    - port: 80
      targetPort: 80
      protocol: TCP
    type: LoadBalancer 
  </code></pre>
  
  <p>I googled a lot but I still have not found how to solve this problem. I would appreciate if someone could give a hand. </p>
  
  <p><a href="https://i.stack.imgur.com/O2aBS.png" rel="nofollow noreferrer">Console error</a></p>