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Merge pull request #40636 from T-Lakshmi/doc-lable-annotation 

Revise details for control plane taints / labels
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Kubernetes Prow Robot 2023-05-24 01:08:50 -07:00 committed by GitHub
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content/en/docs/reference/labels-annotations-taints/_index.md
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@ -1144,15 +1144,22 @@ used to determine if the user has applied settings different from the kubeadm de
Used on: Node
Label that kubeadm applies on the control plane nodes that it manages.
A marker label to indicate that the node is used to run {{< glossary_tooltip text="control plane" term_id="control-plane" >}} components. The kubeadm tool applies this label to the control plane nodes that it manages. Other cluster management tools typically also set this taint.
You can label control plane nodes with this label to make it easier to schedule Pods only onto these nodes, or to avoid running Pods on the control plane. If this label is set, [EndpointSlice controller](/docs/concepts/services-networking/topology-aware-routing/#implementation-control-plane) ignores that node while calculating Topology Aware Hints.
### node-role.kubernetes.io/control-plane {#node-role-kubernetes-io-control-plane-taint}
Used on: Node
Taint that kubeadm applies on control plane nodes to restrict placing pods and allow only specific pods to schedule on them.
Example: `node-role.kubernetes.io/control-plane:NoSchedule`
Taint that kubeadm applies on control plane nodes to allow only critical workloads to schedule on them.
If this Taint is applied, control plane nodes allow only critical workloads to schedule on them. You can manually remove this taint with the following command on a specific node.
```shell
kubectl taint nodes <node-name> node-role.kubernetes.io/control-plane:NoSchedule-
```
### node-role.kubernetes.io/master (deprecated) {#node-role-kubernetes-io-master-taint}