[Mock3_8] 8. kubeconfig

https://kubernetes.io/ko/docs/concepts/configuration/organize-cluster-access-kubeconfig/

A kubeconfig file called super.kubeconfig has been created under /root/CKA. There is something wrong with the configuration. Troubleshoot and fix it.

• Fix /root/CKA/super.kubeconfig

  ---

  Verify host and port for kube-apiserver are correct. Open the super.kubeconfig

  controlplane ~/CKA ➜  kubectl config view
  
  ---
  apiVersion: v1
  clusters:
  - cluster:
      certificate-authority-data: DATA+OMITTED
      server: https://controlplane:6443
    name: kubernetes
  contexts:
  - context:
      cluster: kubernetes
      user: kubernetes-admin
    name: kubernetes-admin@kubernetes
  current-context: kubernetes-admin@kubernetes
  kind: Config
  preferences: {}
  users:
  - name: kubernetes-admin
    user:
      client-certificate-data: DATA+OMITTED
      client-key-data: DATA+OMITTED

  in vi editor. Change the 9999 port to 6443 and run the below command to verify: 왜냐면 kubectl config view 값이랑 맞춰 줘야 하니까 kubectl cluster-info --kubeconfig=/root/CKA/super.kubeconfig

  kubectl cluster-info -h
  
  Display addresses of the control plane and services with label
  kubernetes.io/cluster-service=true. To further debug and diagnose cluster
  problems, use 'kubectl cluster-info dump'.
  
  Examples:
    # Print the address of the control plane and cluster services
    kubectl cluster-info
  
  Available Commands:
    dump          Dump relevant information for debugging and diagnosis
  
  Usage:
    kubectl cluster-info [flags] [options]
  
  Use "kubectl <command> --help" for more information about a given command.
  Use "kubectl options" for a list of global command-line options (applies to all
  commands).
  
  --kubeconfig='':
          Path to the kubeconfig file to use for CLI requests.