Microsoft : Reboot a Server in a Failover Cluster

The guide:

1. Login to the windows host to reboot
2. Select Start> Administrative tools> Failover Cluster Manager
3. Select Failover Cluster Manager
4. Verify which server you need to reboot
5. Select Nodes, right click the desired server, and select Drain Roles
6. Verify that the Roles have migrated successfully by selecting the Node, and navigating to the Roles tab
7. Reboot the host
8. After the reboot has successfully, navigate back to Failover Cluster Manager> Nodes> Right click and select Fail Roles Back

Source:

• https://serverfault.com/questions/963382/how-to-reboot-a-server-in-a-failover-cluster