[ClusterLabs] What are RHCS and LHA fence agents?

[Reid Wahl]

On Mon, Apr 7, 2025 at 4:24 PM Reid Wahl <nwahl at redhat.com> wrote:
>
> What are RHCS and LHA fence agents, and what are they used for today?
>
> I would have guessed from the names and what commit messages I've found that
> * RHCS refers to Red Hat Cluster Suite (a.k.a. cman clusters), which
> has been unsupported since RHEL 7
> * LHA refers to Linux-HA, which... isn't that from Heartbeat clusters
> or something?
>
> All of this is from before my time as a developer for Pacemaker. I'm
> trying to understand what's still relevant and how.
>
> I'm including Yan Gao from SUSE, as they have some commits in the past
> few years related to both agent types.

Related question: Is anyone aware of ANY fence agent that supports a
"nodeid" parameter? We seem to have some dead code in Pacemaker
related to that. I don't see any agent in fence-agents or cluster-glue
(which is apparently related to LHA fencing) that accepts a nodeid
parameter.

-- 
Regards,

Reid Wahl (He/Him)
Senior Software Engineer, Red Hat
RHEL High Availability - Pacemaker