kubectl-label

Add label to resource

$ kubectl label [pod/name] [key]=[value]

$ kubectl label [pod/name] [key]-

$ kubectl label --overwrite [pod/name] [key]=[newvalue]

$ kubectl label pods -l [app=myapp] [env]=[production]

kubectl label type/name key=value [options]

kubectl label adds, updates, or removes labels on Kubernetes resources such as pods, nodes, services, and deployments. Labels are key-value metadata pairs that serve as the primary mechanism for organizing, grouping, and selecting resources throughout the Kubernetes ecosystem. They are used extensively by selectors in services, deployments, and network policies to determine which resources to target.
To add a label, specify a key=value pair; to remove one, append a minus sign to the key name (e.g., `key-`). By default, overwriting an existing label requires the --overwrite flag to prevent accidental changes. The command can operate on individual resources, on all resources of a given type with --all, or on a filtered set matched by a label selector.

--overwrite

Allow overwriting existing labels.

Select all resources of type.

Label selector for filtering.

Kubernetes namespace.

kubectl(1), kubectl-annotate(1)