IBM Cloud Docs
Adding and deleting clusters

Adding and deleting clusters

You can increase or decrease the capacity of your deployment by adding clusters to or deleting clusters from a single-tenant instance. VMware vCenter clusters are the building blocks of VMware Cloud Director resource pools and are added to existing resource pools or are added as part of a resource pool creation.

Procedure to add clusters to VCF as a Service instances

  1. In the VMware Solutions console, click Resources > VCF as a Service from the left navigation pane.
  2. In the VMware Cloud Foundation as a Service table, click the Cloud director sites tab, then click a single-tenant instance name.
  3. Click the Resource pool tab.
  4. On the Clusters tab, click Add cluster +.
  5. On the Add cluster window, specify the settings for the new cluster.
    1. Specify the cluster name.
    2. Select the host quantity.
      • For NFS only storage, select a minimum of 2.
      • For vSAN™ storage, select a minimum of 7.
    3. Select the profile storage type.
    4. Select the host profile.
    5. Click Next.
  6. Specify the attached NFS storage settings.
  7. Review the new cost, select the confirmation checkbox, and click Order to confirm.

Before you delete clusters

Workload virtual machines (VMs) are deployed in virtual data centers (VDCs) that logically exist in the scope of a resource pool. Resource pools physically consist of one or more VMware vCenter clusters. When the resource pool contains multiple clusters and one cluster is deleted, all VMs running in that cluster are migrated to other clusters in the same resource pool.

VMs deployed to a specific storage performance tier are only migrated to the same performance tier of storage in the remaining clusters. You must ensure that the remaining clusters have compatible storage performance layers of the deleted cluster. The remaining clusters must also have enough CPU and memory to contain the VMs of the deleted cluster.

If not enough CPU, RAM, or equivalent storage performance for the cluster exists, the delete operation does not succeed. When the delete cluster operations are not successful, workloads are not impacted, and the operation is retried. Resource constraints are resolved by either stopping or deleting VMs or ensuring other clusters in the resource pool have the resources to support migrated workload VMs.

Procedure to delete clusters from VCF as a Service instances

  1. In the VMware Solutions console, click Resources > VCF as a Service from the left navigation pane.
  2. In the VMware Cloud Foundation as a Service table, click the Cloud director sites tab, then click a single-tenant instance name.
  3. Click the Resource pool tab.
  4. On the Clusters tab, locate the cluster that you want to delete.
  5. Click the vertical overflow menu next to the Status column for that cluster and click Delete cluster.
  6. Confirm that you want to delete.