Hello Eric,
Am Dienstag 30 August 2011 19:02:50 schrieb Eric Blake:
> On 08/30/2011 08:59 AM, Philipp Hahn wrote:
> > On receiving SIGHUP, libvirtd currently only reloads all persistent
> > configs for qemu domains, but fails to reload the associated snapshot
> > data.
...
> Are you sure this is still relevant? In my testing, after this was
> applied, I got lots of errors:
>
> 10:58:09.987: 15794: error : virDomainSnapshotAssignDef:11113 : internal
> error unexpected domain snapshot 1308171632 already exists
>
> and without the patch, it looked to me like the snapshots were still all
> present in memory across SIGHUP without reloading them from disk. I
> have to wonder if commit 6766ff10d made the difference in how things are
> behaving? Perhaps your patch is still needed, but if so, can you give
> me the test scenario you used that shows the difference in behavior pre-
> and post-patch?
I posted that patch more for consistency, since sending a SIGHUP to libvirtd
re-scans for changes in the domain XMl files under /etc/libvirt/qemu/, but
would miss new or updates snapshots under /var/lib/libvirt/qemu/snapshot/.
> Were you hand-modifying the contents of
> /var/lib/libvirt/qemu/snapshot/dom/*.xml behind libvirt's back and
> expecting the SIGHUP to have libvirt incorporate the new xml contents
> from the disk?
Yes, see my other post on snapshots-on-a-shared-storage: I had to get that
working with 0.8.7 and just forward-ported my patch to HEAD.
> Are you missing a step that nukes all existing snapshot
> data in memory before re-reading snapshot data from the disk?
Might be, will re-check.
Sincerely
Philipp
--
Philipp Hahn Open Source Software Engineer hahn@xxxxxxxxxxxxx
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