title: Can not change timezone for kubernetes pod
body: <p>I am trying to modify the config file of a pod to use local time, but it <strong>show invalid</strong> when saving. Do you know what's wrong ?</p>
  
  <p>In volumeMounts section: I added below lines:</p>
  
  <pre><code>- mountPath: /etc/localtime
        name: tz-config 
  </code></pre>
  
  <p>In volumes setion: I added below lines:</p>
  
  <pre><code>- name: tz-config
          hostPath:
            path: /usr/share/zoneinfo/Asia/Ho_Chi_Minh
  </code></pre>
  
  <p>Here is my yaml file:</p>
  
  <pre><code>apiVersion: v1
  kind: Pod
  metadata:
    .....
      terminationMessagePolicy: File
      volumeMounts:
      - mountPath: /var/run/secrets/kubernetes.io/serviceaccount
        name: default-token-jgznd
        readOnly: true  
      - mountPath: /etc/localtime
        name: tz-config            
    dnsPolicy: ClusterFirst
    .....
    volumes:
    - name: default-token-jgznd
      secret:
        defaultMode: 420
        secretName: default-token-jgznd
    - name: tz-config
      hostPath:
        path: /usr/share/zoneinfo/Asia/Ho_Chi_Minh   
  </code></pre>
  
  <p><strong>UPDATE:</strong> Below are error detail</p>
  
  <pre><code># pods "hello-75fdf45c64-w7xm8" was not valid:
  # * spec: Forbidden: pod updates may not change fields other than `spec.containers[*].image`, `spec.initContainers[*].image`, `spec.activeDeadlineSeconds` or `spec.tolerations` (only additions to existing tolerations)
  #   core.PodSpec{
  #       Volumes: []core.Volume{
  #               {Name: "default-token-wcf8m", VolumeSource: core.VolumeSource{Secret: &amp;core.SecretVolumeSource{SecretName: "default-token-wcf8m", DefaultMode: &amp;420}}},
  # -             {
  # -                     Name: "tz-config",
  # -                     VolumeSource: core.VolumeSource{
  # -                             HostPath: &amp;core.HostPathVolumeSource{Path: "/usr/share/zoneinfo/Asia/Ho_Chi_Minh", Type: &amp;""},
  # -                     },
  # -             },
  #       },
  #       InitContainers: nil,
  </code></pre>