title: how to change the port of a kubernetes container/pod?
body: <p>I am displaying the output of the "docker ps -a command" to list all the containers to my Html page. I want to change the port of these containers using a button in the page itself. In docker normally if the container is running, I would run a docker stop on the container-id and restart it by adding the -p HOSTPORT:CONTAINERPORT to the command. But since all the containers running are Kubernetes containers/pods, stopping them will re-create a new pod/container with a different name. So how do I change the port of the container/pod in such cases?</p>
  
  <p>output of "docker ps -a command"</p>
  
  <pre><code> NAMES                              CONTAINER ID  STATUS     
   k8s_nginx_nginx-6cdb6c86d4-z7m7m   56711e6de1be  Up 2 seconds
   k8s_POD_nginx-6cdb6c86d4-z7m7m_d   70b21761cb74  Up 3 seconds
   k8s_coredns_coredns-5c98db65d4-7   dfb21bb7c7f4  Up 7 days
   k8s_POD_coredns-5c98db65d4-7djs8   a336be8230ce  Up 7 days
   k8s_POD_kube-proxy-9722h_kube-sy   5e290420dec4  Up 7 days
   k8s_POD_kube-apiserver-wootz_kub   a23dea72b38b  Exited (255) 7 days ago
  </code></pre>
  
  <p>nginx.yaml</p>
  
  <pre><code>apiVersion: v1
  kind: Service
  metadata:
    name: nginx
    labels:
      app: nginx
  spec:
    type: NodePort
    ports:
    - name: nginxport
      port: 80
      targetPort: 80
      nodePort: 30000
    selector:
      app: nginx
      tier: frontend
  
  ---
  apiVersion: apps/v1
  kind: Deployment
  metadata:
    name: nginx
    labels:
      app: nginx
  spec:
    selector:
      matchLabels:
        app: nginx
        tier: frontend
    template:
      metadata:
        labels:
          app: nginx
          tier: frontend
      spec:
  
        containers:
        - image: suji165475/devops-sample:mxgraph
          name: nginx
          ports:
          - containerPort: 80
            name: nginxport
  </code></pre>
  
  <p>So how can I change the port of any of the containers/pod ?</p>