title: Kubernetes NodePort doesn't return the response from the container
body: <p>I've developed a containerized Flask application and I want to deploy it with Kubernetes. However, I can't connect the ports of the Container with the Service correctly.</p>
  <p>Here is my Deployment file:</p>
  <pre><code>apiVersion: apps/v1beta1
  kind: Deployment
  metadata:
    name: &lt;my-app-name&gt;
  spec:
    replicas: 1
  
    template:
      metadata:
        labels:
          app: flaskapp
      spec:
        containers:
        - name: &lt;container-name&gt;
          image: &lt;container-image&gt;
          imagePullPolicy: IfNotPresent
          ports:  
          - containerPort: 5000
            name: http-port
  ---
  apiVersion: v1
  kind: Service
  metadata:
    name: &lt;service-name&gt;
  spec:
    selector:
      app: flaskapp
    ports:
    - name: http
      protocol: TCP
      targetPort: 5000
      port: 5000
      nodePort: 30013
    type: NodePort
  </code></pre>
  <p>When I run <code>kubectl get pods</code>, everything seems to work fine:</p>
  <pre><code>NAME                              READY     STATUS    RESTARTS   AGE
  &lt;pod-id&gt;                          1/1       Running   0          7m
  </code></pre>
  <p>When I run <code>kubectl get services</code>, I get the following:</p>
  <pre><code>NAME                  TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)         
  &lt;service-name&gt;        NodePort    10.105.247.63   &lt;none&gt;      5000:30013/TCP
  ...
  </code></pre>
  <p>However, when I give the following URL to the browser: 10.105.247.63:30013, the browser keeps loading but never returns the data from the application.</p>
  <p>Does anyone know where the problem could be? It seems that the service is not connected to the container's port.</p>