Multi cluster IBM Fusion HCI using Hosted Control Plane

This section answers questions that are related to the Hosted Control Plane in the IBM Fusion HCI.

  1. Can I use Multi Cluster Engine (MCE) for creating hosted control planes?
    Yes
  2. Is Red Hat® Advanced Cluster Management for Kubernetes (ACM) required for creating hosted control planes?
    ACM is not necessary for creating hosted control planes, as MCE alone is sufficient.
  3. Do I need OPP license to create hosted control planes?
    No, hosted control planes can be created with OpenShift® Container Platform license by using MCE operator.
  4. How do I size my cluster for hosted control planes?
    For sizing information, see Red Hat documentation.
  5. What must be the values of cluster and service network for hosted control plane cluster?
    For more information about the values, see Red Hat documentation.
  6. Can I create VMs in Virtualized hosted control plane cluster?
    No, Red Hat does not support nested virtualization.
  7. Can I create VMs in Bare Metal Hosted Control Plane cluster?
    Yes
  8. Can I create Bare Metal hosted cluster with GPUs nodes?
    Yes
  9. Can I create Hosted Control Plane clusters on IBM Fusion HCI with Dell hardware?
    Yes
  10. I have hosted control plane clusters running on IBM Fusion HCI with ACM. Can I configure IBM Fusion HCI in a Regional-DR relation?
    Yes. You must migrate ACM to an external OpenShift Container Platform cluster leaving MCE and hosted clusters in IBM Fusion HCI.
  11. Can I provide storage through remote mount scale to Hosted Control Plane?
    Yes, only in Bare Metal hosted clusters with minimum three compute nodes.
  12. Can I restrict how much storage a hosted cluster can consume from Fusion Data Foundation provider?
    Yes, using storage quota option of Fusion Data Foundation starting version 4.17.
  13. How do I pin a specific IP for a Hosted Control Plane cluster?
    Define MetalLB ipaddresspool. For the procedure, see MetalLB documentation.
  14. How many clusters can I create?
    With the base rack, 5 Hosted Control Plane clusters are supported. Extended racks are 3 additional clusters per node.

  15. Is Global Data Platform supported as a storage for Hosted Control Plane clusters?
    No, this is still a Technical Preview.

  16. What are the network requirements?
    All Hosted Control Plane clusters must have a private or external IP assigned to them to communicate with the control pods on the hub cluster. A load balancer, such as Metallb, must be installed for this purpose.

  17. Can hosted clusters use the Fusion Data Foundation storage?
    Yes, by installing the Fusion Data Foundation client on each hosted cluster, the cluster receives the Data Foundation storage from the Fusion Data Foundation provider on IBM Fusion HCI.