When I shutdown Openstack compute host (for example reboot required by updates) what happens to virtual machines that were running on that host?
I know that when host starts again the virtual machines are in shutdown state. But were they shutdown normally or was it like the power cord was pulled off?
I am wondering if it necessary to shutdown all virtual machines before shutting down the host server. Virtual machines in question don't need any special operations before shutdown.
Openstack versions I am interested in are Icehouse and Juno. Hypervisor used is KVM.