Re: [libvirt] [RFC] live migration of VMs with internal snapshots

On 04/26/2016 07:54 AM, Dmitry Mishin wrote: >> Hmm. Interesting. But what I'm talking about doesn't involve qemu much. >> We create >> an external temporarily delta for images with internal snapshots on >> libvirt side, >> then merge it on libvirt side thus, qemu shouldn't be affected at all as >> far as I >> understand. > Right now, we are trying the following workaround of this issue: > 1) create external snapshot (without metadata) > 2) undefine internal snapshots' metadata (because libvirt prohibits > migration if detects snapshots) > 3) copy metadata & backing file (primary data qcow2 file with internal > snapshots) to the destination > 4) migrate VM using libvirt > 5) define metadata back > 6) block-commit - to merge delta to original qcow2 image. Yes, that looks like a reasonable workaround. > Things would be much simpler, if they were in libvirt rather than in > management app on top of it. It would indeed be easier - but someone has to contribute the patches for it.