[libvirt-users] Canceling a live migration via virsh? (QEMU/KVM)

Scott Sullivan ssullivan at liquidweb.com
Wed Jan 8 15:25:56 UTC 2014

On 01/08/2014 09:44 AM, Eric Blake wrote:
> On 01/08/2014 07:46 AM, Scott Sullivan wrote:
>> I am using QEMU/KVM, using Live Migrations like this:
>> virsh migrate --live ${name} qemu+ssh://${DESTINATION}/system
>> My question, running this command makes it hang in the foreground. Is
>> there a way for this to return immediately, so I can just poll for the
>> migration status?
> Not at the moment, but it might be worth adding a 'migrate --detach'
> flag for that purpose, then using job control commands to track progress
> independently.
>> Also, is there a way to _cancel_ a migration?
> Hit Ctrl-C (or any other approach for sending SIGINT to virsh).
>> I see
>> the --timeout option, however if a given timeout is reached I would
>> rather have the ability to cancel the migration than force the suspend.
>> I do see there is a QEMU api migrate_cancel..eg:
>> virsh qemu-monitor-command ${name} --pretty '{"execute":"migrate_cancel"}'
>> Is that the only way to cancel a migration using libvirt?
> That way is unsupported.  The supported way (and the way used by ctrl-C
> during 'virsh migrate') is to call virDomainAbortJob().

Thanks Erik, very helpful response.

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