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In Juno we effectively disabled live snapshots with libvirt due to bug 
1334398 [1] failing the gate about 25% of the time.

I was going through the Juno release notes today and saw this as a known 
issue, which reminded me of it and was wondering if there is anything 
being done about it?

As I recall, it *works* but it wasn't working under the stress our 
check/gate system puts on that code path.

One thing I'm thinking is, couldn't we make this an experimental config 
option and by default it's disabled but we could run it in the 
experimental queue, or people could use it without having to patch the 
code to remove the artificial minimum version constraint put in the code.

Something like:

if CONF.libvirt.live_snapshot_supported:
    # do your thing

[1] https://bugs.launchpad.net/nova/+bug/1334398

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Thanks,

Matt Riedemann