Node maintenance

To perform maintenance on a node, you can unschedule and drain a node.

Mark the node as unschedulable by running the following command:
```
kubectl cordon 9.111.255.122
```
Note: Marking the node as unschedulable disables scheduling new pods on the node.
Drain the node in preparation for maintenance to remove pods that are running on the node by running the following command:
```
kubectl drain 9.111.255.122 --grace-period=300 --ignore-daemonsets=true
```
For additional information about draining the node, see the help for the kubectl drain command by entering: kubectl help drain. Because the node was already marked as unschedulable, the pods from the ReplicationController, ReplicaSet, Job, and StatefulSet deployments are not scheduled to this node. The scheduler moves all workloads to another node that is schedulable.

Note: Draining the node from the DaemonSet deployment is not required.
Exit maintenance by running the following command:
```
kubectl uncordon 9.111.255.122
```

Note: The alpha feature TaintNodesByCondition for kube-controller-manager on all master nodes is enabled by default.