3.5 - Lab 6

Objectives and Tasks

• Examine the Tanzu Kubernetes Cluster
• Scale the Tanzu Kubernetes Cluster

Examine the Tanzu Kubernetes Cluster

1. Using the terminal, retrieve the admin kubeconfig file for the workload cluster.

   tanzu cluster kubeconfig get tkc-01 --admin

2. List the kubectl contexts.

   kubectl config get-contexts

3. Set the kubectl context to point to the workload cluster.

   kubectl config use-context tkc-01-admin@tkc-01

4. Display all pods running on the cluster.

   kubectl get pods -A

   The status of some pinniped-post-deploy-job pods might display as error, which is expected.

5. Display the Tanzu Kubernetes cluster nodes.

   kubectl get nodes

   The output displays the following two nodes.

6. In the vSphere Client, click Menu.

7. Click Hosts and Clusters.

8. Review the VM names in the rp-tkg-production resource pool.

   The VM names correspond to the node names in the kubectl get nodes output.

Scale the Cluster

1. Using the terminal, get the Tanzu Kubernetes cluster information.

   tanzu cluster list

   The output shows WORKERS 1/1.

2. Scale the worker nodes to 2.

   tanzu cluster scale tkc-01 -w 2

   The scale operation performs in the background.

3. Verify the status of the scale operation.

   tanzu cluster list

   The output displays STATUS updating and WORKERS 1/2.

4. Set the kubectl context to point to the management cluster.

   kubectl config use-context sa-compute-01-mgmt-admin@sa-compute-01-mgmt

5. Monitor the cluster API resources.

   1. Get the VM status.

      watch kubectl get machines

   2. Wait for the new VM phase to go from Provisioning to Running before continuing.

   3. Press Ctrl+C to exit the watch command.
   4. Verify the status of the scale operation again.

   tanzu cluster list

   The output displays STATUS running and WORKERS 2/2.

   Provisioning can take up to 10 minutes to complete.