20-Labs-KubeConfig.md

Lab - KubeConfig

• Take me to the Lab

Solutions for Lab - KubeConfig:

• Look for the kube config file under the /root/.kube directory.

  $ ls -l /root/.kube
  

• Run the kubectl config view command and count the number of clusters.

  $ kubectl config view
  

• Run the command kubectl config view and count the number of users.

  $ kubectl config view
  

• How many contexts are defined in the default kubeconfig file?

  $ kubectl config view
  

• Run the command kubectl config view and look for the user name.

  $ kubectl config view
  

• What is the name of the cluster configured in the default kubeconfig file?

  $ kubectl config view
  

• Run the command kubectl config view --kubeconfig my-kube-config.

  $ kubectl config view --kubeconfig my-kube-config
  

• How many contexts are configured in the 'my-kube-config' file?

  $ kubectl config view --kubeconfig my-kube-config
  

• What user is configured in the 'research' context?

  $ kubectl config view --kubeconfig my-kube-config
  

• What is the name of the client-certificate file configured for the 'aws-user'?

  $ kubectl config view --kubeconfig my-kube-config
  

• What is the current context set in the 'my-kube-config' file?

  $ kubectl config view --kubeconfig my-kube-config
  

• Run the command kubectl config --kubeconfig=/root/my-kube-config use-context research

  $ kubectl config --kubeconfig=/root/my-kube-config use-context research
  

• Replace the contents in the default kubeconfig file with the content from my-kube-config file.

  $ mv ~/.kube/config ~/.kube/config.bak
  
  $ cp /root/my-kube-config ~/.kube/config
  

• The path to certificate is incorrect in the kubeconfig file. Fix it. All users certificates are stored at /etc/kubernetes/pki/users.

  $ kubectl get pods
  
  $ ls
  
  dev-user.crt  dev-user.csr  dev-user.key
  
  $ vi /root/.kube/config
  
  $ grep dev-user.crt /root/.kube/config
  
  client-certificate: /etc/kubernetes/pki/users/dev-user/dev-user.crt
  
  $ pwd
  
  /etc/kubernetes/pki/users/dev-user
  
  $ kubectl get pods
  
  No resources found in default namespace.