Scale HCI capacity

You can scale your HCI environment to meet changing workload demands by adding or removing Compute nodes.

Note

Red Hat OpenStack Services on OpenShift (RHOSO) supports external deployments of Red Hat Ceph Storage 7, 8, and 9. Configuration examples that reference Red Hat Ceph Storage use Release 7 information. If you are using a later version of Red Hat Ceph Storage, adjust the configuration examples accordingly.

Add nodes to an HCI deployment
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To scale up your HCI deployment, add a new Compute node and configure it to host Red Hat Ceph Storage services.

Procedure
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  1. Add the new node to a node set by following the procedure in Add nodes to a node set.
  2. Add the node set to the data plane. For more information, see Add nodes to a node set.
  3. Configure the node to host Red Hat Ceph Storage services by following the procedure "Adding hosts using the Ceph Orchestrator" in the Red Hat Ceph Storage Operations Guide:
  4. When the new node has joined the Ceph Storage cluster, confirm that the existing configuration has been applied to the node by following the procedure in Verify Red Hat Ceph Storage performance tuning.

Remove nodes from an HCI deployment
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To scale down your HCI deployment, stop hosting Red Hat Ceph Storage services and remove a Compute node.

Procedure
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  1. Remove hosts by using the Ceph Orchestrator, as described in "Removing hosts using the Ceph Orchestrator" in the Red Hat Ceph Storage Operations Guide:
  2. Remove a Compute node from the data plane, as described in the procedure in Remove a Compute node from the data plane.