Removing compute nodes from cloud groups

You can remove one or more compute nodes from a cloud group when the compute node is no longer needed.

Before you begin

You must be assigned System level, Cloud group administration role with permission to Manage cloud resources (Full permission) to remove compute nodes.

About this task

To remove a compute node from its cloud group, the compute node must be powered on and quiesced before you switch it to maintenance mode. To successfully switch into maintenance mode, you must evacuate all virtual machines running on that compute node to other compute nodes in the same cloud group. A virtual machine will not migrate successfully if no other compute nodes in the cloud group has sufficient resources to host it. If a virtual machine cannot be migrated, you must manually stop and store the virtual machine before its compute node can go into maintenance mode.
Important: If you want to remove all compute nodes from a cloud group, you must first remove all data stores associated with that cloud group.
Remember: When removing compute nodes from Virtual Manager cloud groups, you must perform the quiesce and maintenance operations (described in Steps 1 and 2 of the following procedure) on the compute node within each Software Workload Environment hosted by the Virtual Manager cloud group.
Restriction: If a compute node in a Virtual Manager cloud group is configured as a dedicated failover host in the Admission Control section of the VMware vSphere HA settings for the cluster, it cannot be removed from the cloud group. You must remove the host from the list of dedicated failover hosts before you attempt to remove it from the cloud group in Cloud Pak. If the compute node is disconnected in VMware, removing it from the dedicated failover list might not take effect. Double check the dedicated failover hosts list before you attempt to remove the compute node from the cloud group in Cloud Pak. If the host is still in the list of dedicated hosts, attempting to remove it from the cloud group might result in Cloud Pak System showing the compute node as removed, while VMware shows the compute node as still present in the cluster.

Procedure

  1. Quiesce the compute node. See Starting and quiescing compute nodes.
  2. Put the compute node into maintenance mode. See Putting compute nodes into maintenance mode.
  3. Click Cloud > Cloud Groups.
  4. From the list of available cloud groups, select the one from which you want to remove the compute node.
  5. In the Compute nodes section, select the compute node from the menu list.
  6. Click the Delete icon to remove the compute node from the cloud group. Click OK to verify that you want to remove the compute node.
    Tip: Once a compute node has been removed from a Virtual Manager cloud group, the compute node will be removed from each Software Workload Environment upon its next discovery operation.