List Node Labels from the CLI

You can list assigned labels to review and manage the scheduling of Kubernetes objects, such as pods.

Labels are key/value pairs that are attached to nodes and are used to specify identifying attributes of nodes. Labels can be used to identify physical attributes of a node such as special purpose hardware or labels can be used to identify logical attributes of a node, for example the role of a node.

For more information on labels that are used to assign pods to nodes, refer to https://kubernetes.io/docs/concepts/configuration/assign-pod-node/.

Procedure

• To list labels currently assigned to a host, use the host-label-list command.

  The command format is:

  system host-label-list (<hostName> | <hostID>)
  

  For example:

  ~(keystone)admin)$ system host-label-list controller-0
  +--------------+-------------------------+-------------+
  | hostname     | label key               | label value |
  +--------------+-------------------------+-------------+
  | controller-0 | openstack-compute-node  | enabled     |
  | controller-0 | openstack-control-plane | enabled     |
  | controller-0 | openvswitch             | enabled     |
  | controller-0 | SRIOV                   | enabled     |
  +--------------+-------------------------+-------------+