[ovirt-users] Snapshot of the Self-Hosted Engine

[Simone Tiraboschi]

On Wed, Mar 28, 2018 at 9:13 AM, Yedidyah Bar David <didi at redhat.com> wrote:

> On Tue, Mar 27, 2018 at 4:23 PM, FERNANDO FREDIANI
> <fernando.frediani at upx.com> wrote:
> > Hello
> >
> > Is it possible to snapshot the Self-Hosted Engine before an Upgrade ? If
> so
> > how ?
>
> I do not think so - I do not think anything changed since this:
>
> http://lists.ovirt.org/pipermail/users/2016-November/044103.html
>
> I agree it sounds like a useful thing to have. Not sure how hard it
> can be to implement it. Feel free to open an RFE bz.
>

We are using a disk lease to prevent split brains, AFAIK snapshots are not
compatible with disk leases.


>
> Basically, we'll have to:
>
> 1. Make sure everything continues to work sensibly - engine/vdsm do
> the right things, ha agent works as expected, etc.
>
> 2. Provide means to start the vm from a snapshot, and/or revert to a
> snapshot. This is going to be quite ugly, because it will have to
> duplicate in ovirt-hosted-engine-setup/-ha functionality that already
> exists in the engine, because at that point the engine is not
> available to assist with this.
>
> Best regards,
> --
> Didi
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>
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