[ClusterLabs] Pacemaker 1.1.16 - Release Candidate 1

[Adam Spiers]

Klaus Wenninger <kwenning at redhat.com> wrote:
> On 11/03/2016 05:28 PM, Adam Spiers wrote:
> > Ken Gaillot <kgaillot at redhat.com> wrote:
> >> ClusterLabs is happy to announce the first release candidate for
> >> Pacemaker version 1.1.16. Source code is available at:
> >>
> >> https://github.com/ClusterLabs/pacemaker/releases/tag/Pacemaker-1.1.16-rc1
> >>
> >> The most significant enhancements in this release are:
> > [snipped]
> >
> >> * Watchdog-based fencing using sbd now works on remote nodes.
> > What were the problems with this before, exactly?  Thanks!
> If you enabled just cluster-watcher on remote-nodes that
> was not much of an observation.
> 
> But if you in addition enabled pacemaker-watcher then
> when the remote-node-resource switched from one
> cluster-node to another the client receiving the
> cib inside pacemaker-watcher didn't get that switch
> and still insisted on getting something via the old
> connection so that the node was reset via watchdog.
> 
> Introducing a tcp-timeout derived from the
> sbd-watchdog-timeout makes the connection timeout
> and the client switches to the new control-node.
> 
> So a remote-node would just be watchdog-fenced
> if the remote-node-resource doesn't reconnect within
> time - regardless which node it is running now.
> 
> Actually that commit in pacemaker should be beneficial
> for tooling run on remote-nodes - via proxy - in general.

Thanks a lot for this info!  I have to admit I don't fully understand,
because I don't know what pacemaker-watcher and cluster-watcher are.
Are they specific to Red Hat?