Node Labels Populated By The Kubelet

Kubernetes nodes come pre-populated with a standard set of labels.

You can also set your own labels on nodes, either through the kubelet configuration or using the Kubernetes API.

Preset labels

The preset labels that Kubernetes sets on nodes are:

• kubernetes.io/arch
• kubernetes.io/hostname
• kubernetes.io/os
• node.kubernetes.io/instance-type (if known to the kubelet – Kubernetes may not have this information to set the label)
• topology.kubernetes.io/region (if known to the kubelet – Kubernetes may not have this information to set the label)
• topology.kubernetes.io/zone (if known to the kubelet – Kubernetes may not have this information to set the label)

Note:

The value of these labels is cloud provider specific and is not guaranteed to be reliable. For example, the value of kubernetes.io/hostname may be the same as the node name in some environments and a different value in other environments.

What’s next

• See Well-Known Labels, Annotations and Taints for a list of common labels.
• Learn how to add a label to a node.