On Wednesday 29 October 2014 13:29:25 Eric Blake wrote: > On 10/29/2014 01:07 PM, Thomas Stein wrote: > > About the --quiesce option. Do i need to do something inside the vm? The > > most commonly would probably be a sql server running inside the vm. Do i > > need to tell the sql server something about the --quiesce option i use? I > > read this article here which suggests such a procedure. Okay, it's > > vmware, but... Is that right? > > For --quiesce to work, you have to have qemu-guest-agent installed and > running in your guest, and also inform libvirt via the domain XML to > establish a channel to the guest agent. Furthermore, if you want your > sql database to be at a stable point, you can install freeze hooks in > your guest that get invoked prior to freezing the file system and just > after thawing it (that is, qemu-guest-agent already has documented hooks > that let you do any additional prep work beyond just freezing the file > system). > > A quick google search found this: > http://callecalle.uach.cl/ovirt-engine/docs/manual/en_US/html/Technical_Guid > e/QEMU_Guest_Agent_Overview.html > > Sadly, it didn't spell out the name of where you install hook scripts > into the guest. But this commit is pretty telling: > https://github.com/qemu/qemu/blob/master/scripts/qemu-guest-agent/fsfreeze-h > ook Thank you very much Eric. The hole thing now raises a few more questions. But maybe i will ask them later. :-) cheers t.
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