Increase Guest Cluster node disk space

Products

• VMware vSphere with Tanzu

Issue/Introduction

Need to increase Cluster Node Volumes.

Resolution

In TKG cluster nodes specification for nodes you can optionally declare one or more persistent volumes for the node.

Considerations:

Worker node volume changes are allowed:

• After a TKG cluster is previsioned, you can add or update worker node volumes. When you initiate a rolling update, the cluster is updated with the new or changed volume.

     Warning: if you scale the worker node with a new or changed volume, data in the current volume is deleted during the rolling update.

Control plane nodes volume changes are allowed from vSphere 8 U3 and later

 

The following is an excerpted cluster specification based on the v1alpha3 API with declared node volumes. Refer to the complete TKG cluster example from which this example is taken:

v1alpha3 Example: TKC with Default Storage and Node Volumes 

v1beta1 Example: Custom Cluster Based on the Default ClusterClass

Example based on  v1alpha3 API:

apiVersion: run.tanzu.vmware.com/v1alpha3
kind: TanzuKubernetesCluster
...
spec:
   topology:
     controlPlane:
       replicas: 3
       storageClass: tkg-storage-policy
       vmClass: guaranteed-medium
       tkr:
         reference:
           name: v1.24.9---vmware.1-tkg.4
     nodePools:
     - name: worker-nodepool-a1
       replicas: 3
       storageClass: tkg-storage-policy
       vmClass: guaranteed-large
       tkr:
         reference:
           name: v1.24.9---vmware.1-tkg.4
       volumes:
       - name: containerd
         mountPath: /var/lib/containerd
         capacity:
           storage: 50Gi
       - name: kubelet
         mountPath: /var/lib/kubelet
         capacity:
           storage: 50Gi
     - name: worker-nodepool-a2
       ...
   settings:
     ...

 

Once you have the example coded, you need to apply the yaml file by:

kubectl apply -f filecreated.yaml