With power host management workflows you can reboot or shut down a host.

To access these workflows, navigate to Library > Workflows and enter the vcenter, host_management and power tags in the workflow search box.

Workflow Name Description
Reboot host Reboots a host. If the Orchestrator client is connected directly to the host, it loses the connection to the host and does not receive an indication of success in the returned task.
Shut down host Shuts down a host. If the Orchestrator client is connected directly to the host, it loses the connection to the host and does not receive an indication of success in the returned task.