[PVE-User] pve-csync version of pve-zsync?

[Alwin Antreich]

On Mon, Mar 12, 2018 at 04:51:32PM +0000, Mark Adams wrote:
> Hi Alwin,
>
> The last I looked at it, rbd mirror only worked if you had different
> cluster names. Tried to get it working with proxmox but to no avail,
> without really messing with how proxmox uses ceph I'm not sure it's
> feasible, as proxmox assumes the default cluster name for everything...
That isn't mentioned anywhere in the ceph docs, they use for ease of
explaining two different cluster names.

If you have a config file named after the cluster, then you can specifiy
it on the command line.
http://docs.ceph.com/docs/master/rados/configuration/ceph-conf/#running-multiple-clusters

>
> Also the documentation was a bit poor for it IMO.
Which documentation do you mean?
? -> http://docs.ceph.com/docs/master/rbd/rbd-mirroring/

>
> Would also be nice to choose specifically which VM's you want to be
> mirroring, rather than the whole cluster.
It is done either per pool or image separately. See the link above.

>
> I've manually done rbd export-diff and rbd import-diff between 2 separate
> proxmox clusters over ssh, and it seems to work really well... It would
> just be nice to have a tool like pve-zsync so I don't have to write some
> script myself. Seems to me like something that would be desirable as part
> of proxmox as well?
That would basically implement the ceph rbd mirror feature.

>
> Cheers,
> Mark
>
> On 12 March 2018 at 16:37, Alwin Antreich <a.antreich at proxmox.com> wrote:
>
> > Hi Mark,
> >
> > On Mon, Mar 12, 2018 at 03:49:42PM +0000, Mark Adams wrote:
> > > Hi All,
> > >
> > > Has anyone looked at or thought of making a version of pve-zsync for
> > ceph?
> > >
> > > This would be great for DR scenarios...
> > >
> > > How easy do you think this would be to do? I imagine it wouId it be quite
> > > similar to pve-zsync, but using rbd export-diff and rbd import-diff
> > instead
> > > of zfs send and zfs receive? so could the existing script be relatively
> > > easily modified? (I know nothing about perl....)
> > >
> > > Cheers,
> > > Mark
> > > _______________________________________________
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> > > pve-user at pve.proxmox.com
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> > Isn't ceph mirror already what you want? It can mirror a image or a
> > whole pool. It keeps track of changes and serves remote image deletes
> > (adjustable delay).
> >