Re: [libvirt-users] Create multiple domains from single saved domain state (is UUID/name fixed?)

Hi Jonas, I asked a similar question here last week. You could find it by searching for this topic in the mailing list archives: "Clone VM with saved state". That being said I'd be very glad if you could update here when you find a complete solution. - Michael

On Mon, Apr 18, 2016 at 9:49 PM, Jonas Finnemann Jensen <jonasfj(a)mozilla.com > wrote: > Hi, > > I would like to save a running domain (ie. disk + memory) and be able to > restore it multiple times creating duplicates of the orignal domain all > starting from the same state. > Use case: > I'm building a task-processing system for use in a CI flow. > I want to run multiple VMs in parallel using the same image (always > starting from the same state). > And to avoid needlessly booting between each task, I would like to save > (and distribute) the domain state, so that I just restore from memory. > > However, I can't seems to change the UUID or the name of a domain once it > is saved. > Nor do I seem able to rename a domain while it is running. > > I can obviously duplicate both the disks and the file to which I saved the > domain state using "virsh save". > But I seem unable to rename before I restore.. Any ideas? > > Could I do this with snapshots? I suspect not since I see > virDomainSnapshotRedefinePrep() calling > virDomainDefCheckABIStability which raises the error here: > https://fossies.org/dox/libvirt-1.3.3/domain__conf_8c_source.html#l17991 > > Out of curiosity does anyone know what horrors might befall me if I were > to remove the lines protecting against name and UUID changes? Then compile > my own libvirt... > The comment in the code says name can be changed, but I'm guessing I would > have to change the UUID too. Does anyone see how that would create issues? > I'm not sure how libvirt uses the UUID internally. > > -- > Regards Jonas Finnemann Jensen. > > _______________________________________________ > libvirt-users mailing list > libvirt-users(a)redhat.com > https://www.redhat.com/mailman/listinfo/libvirt-users >

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