[ClusterLabs] Why do clusters have a name?

[Jehan-Guillaume de Rorthais]

On Wed, 27 Mar 2019 09:59:16 +0100
Kristoffer Grönlund <kristoffer.gronlund at suse.com> wrote:

> On Wed, 2019-03-27 at 08:27 +0100, Ivan Devát  wrote:
> > On 26. 03. 19 21:12, Brian Reichert wrote:  
> > > This will sound like a dumb question:
> > > 
> > > The manpage for pcs(8) implies that to set up a cluster, one needs
> > > to provide a name.
> > > 
> > > Why do clusters have names?
> > > 
> > > Is there a use case wherein there would be multiple clusters
> > > visible
> > > in an administrative UI, such that they'd need to be
> > > differentiated?
> > >   
> > 
> > For example in a web UI of pcs is a page with multiple clusters.
> >   
> 
> We use cluster names and rules to apply the same exact CIB to multiple
> clusters, particularly when configuring geo clusters.

I'm not sure to understand. Is it possible to have multiple Pacemaker
daemon instances on the same serveurs?

Or do you mean it is possible to have multiple namespace where resources are
isolated in and one Pacemaker daemon to manage them?