[ClusterLabs] Corosync over dedicated interface?

[Jehan-Guillaume de Rorthais]

On Mon, 3 Oct 2022 14:45:49 +0200
Tomas Jelinek <tojeline at redhat.com> wrote:

> Dne 28. 09. 22 v 18:22 Jehan-Guillaume de Rorthais via Users napsal(a):
> > Hi,
> > 
> > A small addendum below.
> > 
> > On Wed, 28 Sep 2022 11:42:53 -0400
> > "Kevin P. Fleming" <kevin at km6g.us> wrote:
> >   
> >> On Wed, Sep 28, 2022 at 11:37 AM Dave Withheld <davewithheld at hotmail.com>
> >> wrote:  
> >>>
> >>> Is it possible to get corosync to use the private network and stop trying
> >>> to use the LAN for cluster communications? Or am I totally off-base and am
> >>> missing something in my drbd/pacemaker configuration?  
> >>
> >> Absolutely! When I setup my two-node cluster recently I did exactly
> >> that. If you are using 'pcs' to manage your cluster, ensure that you
> >> add the 'addr=' parameter during 'pcs host auth' so that Corosync and
> >> the layers above it will use that address for the host. Something
> >> like:
> >>
> >> $ pcs host auth cluster-node-1 addr=192.168.10.1 cluster-node-2
> >> addr=192.168.10.2  
> > 
> > You can even set multiple rings so corosync can rely on both:
> > 
> >    $ pcs host auth                                    \
> >      cluster-node-1 addr=192.168.10.1 addr=10.20.30.1 \
> >      cluster-node-2 addr=192.168.10.2 addr=10.20.30.2  
> 
> Hi,
> 
> Just a little correction.
> 
> The 'pcs host auth' command accepts only one addr= for each node. The 
> address will be then used for pcs communication. If you don't put any 
> addr= in the 'pcs cluster setup' command, it will be used for corosync 
> communication as well.
> 
> However, if you want to set corosync to use multiple rings, you do that 
> by specifying addr= in the 'pcs cluster setup' command like this:
> 
> pcs cluster setup cluster_name \
> cluster-node-1 addr=192.168.10.1 addr=10.20.30.1 \
> cluster-node-2 addr=192.168.10.2 addr=10.20.30.2
> 
> If you used addr= in the 'pcs host auth' command and you want the same 
> address to be used by corosync, you need to specify that address in the 
> 'pcs cluster setup' command. If you only specify the second address, 
> you'll end up with a one-ring cluster.

Oops! I mixed commands up, sorry!

Thank you Tomas.