libvirt users - Jul 2017 - automatically reverting to a snapshot

<div dir='auto'>How can I automatically revert to a snapshot after
the guest is stopped?<div
dir="auto"><br></div><div
dir="auto">/etc/libvirt/hooks/qemu
</div><div dir="auto">#!/bin/sh
</div><div dir="auto">name="<span
class="money">$1</span>"
</div><div dir="auto">action="<span
class="money">$2</span>"
</div><div dir="auto">if [ "$name" =
"name" ]; then
</div><div dir="auto">&nbsp;virsh snapshot-revert
"$name" --snapshotname "snapshot1"
</div><div dir="auto">fi</div><div
dir="auto"><br></div><div dir="auto">I
tried this which resulted in a deadlock, then I saw the warning further down the
page.</div></div>

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On Tue, Jul 25, 2017 at 16:08:58 +0100, Dirty Dan wrote:
> <div dir='auto'>How can I automatically revert to a snapshot
after the guest is stopped?<div
dir="auto"><br></div><div
dir="auto">/etc/libvirt/hooks/qemu
</div><div dir="auto">#!/bin/sh
</div><div dir="auto">name="<span
class="money">$1</span>"
</div><div dir="auto">action="<span
class="money">$2</span>"
</div><div dir="auto">if [ "$name" =
"name" ]; then
</div><div dir="auto">&nbsp;virsh snapshot-revert
"$name" --snapshotname "snapshot1"
</div><div dir="auto">fi</div><div
dir="auto"><br></div><div dir="auto">I
tried this which resulted in a deadlock, then I saw the warning further down the
page.</div></div>

The hook documentation explicitly states that no calls to libvirt shoudl
be executed from the hook.

You can start a process in background, which will terminate the hook and
that process should be able to do libvirt calls.