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docs/doc/source/deploy_install_guides/release/openstack/convert-worker-nodes-0007b1532308.rst
Ron Stone f98eb51fb4 Simplify install dirs 
Simplify install doc dir structure
- Remove r6 directory
- Rename r7 directory to be non release-specific
- Delete unused files
- Delete obsolete include files
- Delete obsolete commented sections in install topics
- Remove redundent version menu entry

Signed-off-by: Ron Stone <ronald.stone@windriver.com>
Change-Id: I59634826d4b3af41410e9d26cc182f6b4aed8ade
2023-01-04 07:30:40 -05:00

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Convert Worker Nodes

In a hybrid (Kubernetes and OpenStack) cluster scenario you may need to convert worker nodes to/from openstack-compute-nodes.

  1. Convert a k8s-only worker into a OpenStack compute

    1. Lock the worker host:

      system host-lock <host>

    2. Add the openstack-compute-node taint.

      kubectl taint nodes <kubernetes-node-name> openstack-compute-node:NoSchedule

    3. Assign OpenStack labels:

      system host-label-assign <host> --overwrite openstack-compute-node=enabled avs=enabled sriov=enabled

    4. Allocate vswitch huge pages:

      system host-memory-modify -1G 1 -f vswitch <host> 0
system host-memory-modify -1G 1 -f vswitch <host> 1

    5. Change the class of the data network interface:

      system host-if-modify -c data <host> <if_name_or_uuid>

      Note

      If data network interface does not exist yet, refer to documentation on creating it.

    6. Change Kubernetes CPU Manager Policy to allow to use application cores:

      system host-label-remove <host> kube-cpu-mgr-policy

    7. Unlock the worker host:

      system host-unlock <host>
  2. Convert a OpenStack compute into a k8s-only worker.

    1. Lock the worker host:

      system host-lock <host>

    2. Remove OpenStack labels:

      system host-label-remove <host> openstack-compute-node avs sriov

      Note

      The labels have to be removed, not to have its values changed.

    3. Deallocate vswitch huge pages:

      system host-memory-modify -1G 0 -f vswitch <host> 0
system host-memory-modify -1G 0 -f vswitch <host> 1

    4. Change the class of the data network interface:

      system host-if-modify -c none <host> <if_name_or_uuid>

      Note

      This change is needed to avoid raising a permanent alarm for the interface without the need to delete it.

    5. Unlock the worker host:

      system host-unlock <host>