I have deployed a docker application onto my docker hub https://hub.docker.com/r/leexha/nodejsapp/.

I verfiied this by doing a docker pull and did a docker run docker run -p 8000:3000 index.docker.io/leexha/nodejsapp:latest

I am trying to deploy this into kubernetes. This is my deploy.yml file:

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: secondapp
spec:
  replicas: 3
  template:
    metadata:
      labels:
        app: webapp
    spec:
      containers:
      - name: webapp
        image: index.docker.io/leexha/nodejsapp
        ports:
        - containerPort: 3000
        resources:
          requests: 
            memory: 500Mi
            cpu: 0.5
          limits:
            memory: 500Mi
            cpu: 0.5
        imagePullPolicy: Always

I then exposed the deployment as a service:

C:\Users\adrlee\Desktop\oracle\Web_projects>kubectl get nodes
NAME              STATUS     ROLES     AGE       VERSION
xxxxxxxxxxx   Ready      node      1d        v1.8.11
yyyyyyyyyyy    NotReady   node      1d        v1.8.11
zzzzzzzzzzz    Ready      node      1d        v1.8.11

C:\Users\adrlee\Desktop\oracle\Web_projects>kubectl get deployments
NAME       DESIRED   CURRENT   UP-TO-DATE   AVAILABLE   AGE
firstapp   3         3         3            3           6m

C:\Users\adrlee\Desktop\oracle\Web_projects>kubectl expose deployment/firstapp --type="NodePort" --port 3000
service "firstapp" exposed

C:\Users\adrlee\Desktop\oracle\Web_projects>kubectl get services
NAME         TYPE        CLUSTER-IP    EXTERNAL-IP   PORT(S)          AGE
firstapp     NodePort    10.96.156.3   <none>        3000:31872/TCP   10s
kubernetes   ClusterIP   10.96.0.1     <none>        443/TCP          1d

It seems everything is in order however when I try to access my application on the cluster (:3000) it can't be access.

So I tried to do a bit of debugging.

I did:

export POD_NAME=$(kubectl get pods -o go-template --template '{{range .items}}                                       {{.metadata.name}}{{"\n"}}{{end}}')

and I did a curl

curl http://localhost:8001/api/v1/namespaces/default/pods/$POD_NAME/proxy/

I notice this response:

}
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0cu                                       rl: (6) Could not resolve host: firstapp-f85d8f76c-bqsst
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0cu                                       rl: (6) Could not resolve host: firstapp-f85d8f76c-txlng

Little lost what to do now. Would appreciate any help?