30-Labs-Kubectl-Proxy-Port-Forward.md

Lab - Kubectl-Proxy-&-Port-Forward

• Take me to the Lab

Solutions for Lab - Kubectl Proxy & Port Forward:

• kubectl command line utility can be used to interact with the Kubernetes API server directly.

• ~/.kube/config file stores the authentication credentials for kubectl.

• both --key and --cert options are the options we missing in curl command curl -k https://localhost:6443

• Kubectl proxy command is used to start proxy on the controlplane node

• Call the API endpoint /version of kubectl proxy using curl and redirect the output to the file: /root/kube-proxy-version.json Tip: Open a new terminal if you didn't run kubectl proxy as a background service in the previous step

  $ curl 127.0.0.1:8001/version > /root/kube-proxy-version.json
  

• Call the API endpoint /version of kubectl proxy using curl and redirect the output to the file: /root/kube-proxy-version.json

  $ kubectl proxy --port 8002 &
  

• kubectl port-forward can forward a local port to a port on the Pod

• kubectl port-forward pod/app 8000:5000 used to forward port 8000 on the host to port 5000 on the pod app

• We deployed the nginx app in the default namespace. Wait for a few seconds for the pod to spin up. Forward port 8005 of localhost to port 80 of nginx pods. Run port-forward process in background. Try accessing port 8005 after port forwarding.

  
  $ kubectl get all
  
  $ kubectl port-forward pods/{POD_NAME} 8005:80 &
  
  OR
  
  $ kubectl port-forward deployment/{DEPLOYMENT_NAME} 8005:80 &
  
  OR
  
  $ kubectl port-forward service/{SERVICE_NAME} 8005:80 &
  
  OR
  
  $ kubectl port-forward replicaset/{REPLICASET_NAME} 8005:80 &
  
  then try curl localhost:8005 to check nginx response
  

• Summary

  kubectl port-forward can forward a local port to a port on the Pod and kubectl port forward opens port to target deployment pods.