[Pacemaker] Corosync using unicast instead of multicast

[Alan Jones]

This question should be on the openais list, however, I happen to know
the answer.
To get up and running quickly you can configure broadcast with the
version you have.
Corosync can distinguish separate clusters with the multicast address
and port that become payload to the messages.
The patch you referred to can be applied to the top of tree for
corosync or you can wait for a new release 1.3.0 planned for the end
of November.
Alan

On Thu, Nov 4, 2010 at 1:02 AM, Dan Frincu <dfrincu at streamwide.ro> wrote:
> Hi all,
>
> I'm having an issue with a setup using the following:
> cluster-glue-1.0.6-1.6.el5.x86_64.rpm
> cluster-glue-libs-1.0.6-1.6.el5.x86_64.rpm
> corosync-1.2.7-1.1.el5.x86_64.rpm
> corosynclib-1.2.7-1.1.el5.x86_64.rpm
> drbd83-8.3.2-6.el5_3.x86_64.rpm
> kmod-drbd83-8.3.2-6.el5_3.x86_64.rpm
> openais-1.1.3-1.6.el5.x86_64.rpm
> openaislib-1.1.3-1.6.el5.x86_64.rpm
> pacemaker-1.0.9.1-1.el5.x86_64.rpm
> pacemaker-libs-1.0.9.1-1.el5.x86_64.rpm
> resource-agents-1.0.3-2.el5.x86_64.rpm
>
> This is a two-node HA cluster, with the nodes interconnected via bonded
> interfaces through the switch. The issue is that I have no control of the
> switch itself, can't do anything about that, and from what I understand the
> environment doesn't allow enabling multicast on the switch. In this
> situation, how can I have the setup functional (with redundant rings,
> rrp_mode: active) without using multicast.
>
> I've seen that individual network sockets are formed between nodes, unicast
> sockets, as well as the multicast sockets. I'm interested in knowing how
> will the lack of multicast affect the redundant rings, connectivity,
> failover, etc.
>
> I've also seen this page
> https://lists.linux-foundation.org/pipermail/openais/2010-October/015271.html
> And here it states using UDPU transport mode avoids using multicast or
> broadcast, but it's a patch, is this integrated in any of the newer versions
> of corosync?
>
> Thank you in advance.
>
> Regards,
>
> Dan
>
> --
> Dan FRINCU
> Systems Engineer
> CCNA, RHCE
> Streamwide Romania
>
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