On Fri, 11 May 2012, Theo Band wrote: > I use KVM on two identical centos5 hosts. [....] > > My question is, how can I prevent host A from starting a "shut off" > VM that actually has been migrated to host B? The VM could actually > be running on any another host. It could also have been crashed. The > most simple solution would be some sort of lock file placed next to > the disk image location, so seen by all hosts. But perhaps there is > another way of working with virt-manager that I am not aware of? My way of dealing with that is to undefine the domain on host A after it's been moved to host B, e.g., virsh migrate --live myvm remote://host-b virsh undefine myvm The CentOS 6 version of virsh allows those operations to be combined: virsh migrate --live --persistent --undefinesource myvm ... -- Paul Heinlein heinlein at madboa.com 45°38' N, 122°6' W