docs/doc/source/node_management/openstack/using-labels-to-identify-openstack-nodes.rst

Use Labels to Identify OpenStack Nodes

The application is deployed on the nodes of the based on node labels.

Prior to initially installing the application or when adding nodes to a deployment, you need to label the nodes appropriately for their OpenStack role.

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Table 1. Common OpenStack Labels

Label	Worker/Controller	Description
openstack-control-plane	Controller All-in-One Controller	Identifies a node to deploy openstack controller services on.
openstack-compute-node	Worker	Identifies a node to deploy openstack compute agents on. Note Adding or removing this label, or removing a node with this label from a cluster, triggers the regeneration and application of the helm chart overrides of the openstack application.
sriov	Worker All-in-One Controller	Identifies a node as supporting sr-iov.

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For more information. see : Configuring Node Labels from The CLI <assigning-node-labels-from-the-cli>.

Nodes must be locked before labels can be assigned or removed.

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1. To assign Kubernetes labels to identify compute-0 as a compute node with and SRIOV, use the following command:

   ~(keystone)admin)$ system host-label-assign compute-0 openstack-compute-node=enabled sriov=enabled
   +-------------+--------------------------------------+
   | Property    | Value                                |
   +-------------+--------------------------------------+
   | uuid        | 2909d775-cd6c-4bc1-8268-27499fe38d5e |
   | host_uuid   | 1f00d8a4-f520-41ee-b608-1b50054b1cd8 |
   | label_key   | openstack-compute-node               |
   | label_value | enabled                              |
   +-------------+--------------------------------------+
   +-------------+--------------------------------------+
   | Property    | Value                                |
   +-------------+--------------------------------------+
   | uuid        | d8e29e62-4173-4445-886c-9a95b0d6fee1 |
   | host_uuid   | 1f00d8a4-f520-41ee-b608-1b50054b1cd8 |
   | label_key   | sriov                                |
   | label_value | enabled                              |
   +-------------+--------------------------------------+

2. To remove the labels from the host, do the following.

   ~(keystone)admin)$ system host-label-remove compute-0 openstack-compute-node sriov
   Deleted host label openstack-compute-node for host compute-0
   Deleted host label sriov for host compute-0

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