[ClusterLabs] Pacemaker 3.0.1-rc1 now available

[Chris Lumens]

Hi all,

I am happy to announce that the source code for the first release
candidate for Pacemaker version 3.0.1 is now available at:

https://github.com/ClusterLabs/pacemaker/releases/tag/Pacemaker-3.0.1-rc1

Highlights previously discussed on this list include:

* TLS support for Pacemaker Remote nodes.
* IPC improvements for large messages that get rid of the need to set
   PCMK_ipc_buffer in /etc/sysconfig/pacemaker.
* Use dbus messages to properly detect the completion of start and stop
   actions for systemd resources.

Another major change worth mentioning relates to previous comments about
a Pacemaker Remote node fencing fix
(https://lists.clusterlabs.org/pipermail/users/2025-June/036571.html).
Starting with Pacemaker-3.0.1-rc1, the new fencing behavior described in
that email will be the default.  If this causes you problems, you can
opt-out of that behavior with:

     # pcs property set fence-remote-without-quorum=true

If you experience any problems with this, please do not hesitate to
email immediately so we can take a look at it.  This is new behavior and
while we are fairly confident that this change won't cause problems, we
want to be absolutely sure.

There are several other minor bug fixes including fixing memory leaks, a
segfault in pacemaker-attrd, improvements to the crm_simulate tool, XML
ACL fixes, and a ton of API deprecations that shouldn't actually impact
anyone.

For more details about changes in this release, please see the change
log:

https://github.com/ClusterLabs/pacemaker/blob/3.0/ChangeLog.md

Everyone is encouraged to download, compile, and test the new release.
We do many regression tests and simulations, but we can't cover all
possible use cases, so your feedback is important and appreciated.

Many thanks to all contributors of source code to this release,
including Aleksei Burlakov, Athos Ribeiro, Gao,Yan, Hideo Yamauchi, Ken
Gaillot, Klaus Wenninger, Reid Wahl, Renan Rodrigo, Satomi OSAWA, Thomas
Jones, WhiteWLf-dev, and xin liang

- Chris