On Fri, 2012-05-11 at 12:51 +0200, Theo Band wrote: > I use KVM on two identical centos5 hosts. > > I can live migrate the virtual machines from one to the other and it > works great. Once I do this, I can see VM definitions on both hosts > using virt-manager or virsh list --all > On one machine the VM is running, on the other it reports "shut off". > The disk images are accessible to both host machines and I want to have > only one running a the time (of course). If the VM locks up, I could by > mistake think that the machine is not running and try to start it on the > wrong host. > > 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? > > Theo This may not be what you are looking for, but you could always dump the xml of the domain to a file (so you could define/start it again if needed), then undefine the domain using virsh.