[PATCH V2 9/9] kbase: Update rpm-deployment.rst with new subpackages

[Daniel P. Berrangé]

On Thu, Dec 15, 2022 at 07:50:43AM -0800, Andrea Bolognani wrote:
> On Wed, Dec 14, 2022 at 02:55:30PM -0700, Jim Fehlig wrote:
> > On 12/14/22 11:08, Andrea Bolognani wrote:
> > > On Tue, Dec 13, 2022 at 05:31:02PM -0700, Jim Fehlig wrote:
> > > > +* libvirt-daemon-plugin-lockd
> > > > +  This package provides the lockd.so module, a daemon plugin for communicating
> > > > +  with a virtlockd configured to use POSIX fcntl advisory locks.
> > > > +
> > > > +* libvirt-daemon-plugin-sanlock
> > > > +  This package provides the sanlock.so module, a daemon plugin for communicating
> > > > +  with a virtlockd configured to use sanlock.
> > >
> > > Based on Dan's explanation, these descriptions are not accurate: the
> > > lockd.so module is used by the hypervisor driver to manage locks via
> > > virtlockd, while the sanlock.so to do the same via sanlock.
> >
> > I think the first one is accurate. lockd.so is a plugin for daemons to
> > communicate with virtlockd. Daniel wrote
> >
> > "virtqemud locks(sic) the lockd.so plugin, as lockd.so
> > provides the client impl to talk to virtlockd. Think of lockd.so
> > as being equiv of libvirt.so".
> >
> > I assume sanlock.so is the same. It provides the client impl for daemons to
> > talk to virtlockd's sanlock backend. Regardless, suggestions on the actual
> > text to put here would be much appreciated.
> 
> My understanding is that configuring the hypervisor driver to use
> sanlock results in it loading the sanlock.so plugin and calling out
> to sanlock directly, without going through virtlockd. virlockd is
> used when lockd.so is loaded. Basically the plugins provide the
> implementation of the locking interface, with the backend being
> sanlock and virtlockd respectively.

Yes,  sanlock has its own daemon that's the equivalent of virtlockd.

Libvirt only needs to proivde the client side of sanlock (our plugin).


With regards,
Daniel
-- 
|: https://berrange.com      -o-    https://www.flickr.com/photos/dberrange :|
|: https://libvirt.org         -o-            https://fstop138.berrange.com :|
|: https://entangle-photo.org    -o-    https://www.instagram.com/dberrange :|