[ClusterLabs] Pacemaker 2.0.0 has been released

[Ken Gaillot]

I am very happy to announce that source code for the final release of
Pacemaker version 2.0.0 is now available at:

https://github.com/ClusterLabs/pacemaker/releases/tag/Pacemaker-2.0.0

The main goal of the change from Pacemaker 1 to 2 is to drop support
for deprecated legacy usage, in order to make the code base more
maintainable going into the future.

Rolling (live) upgrades are possible only from Pacemaker 1.1.11 or
later, on top of corosync 2 or later. Other setups can be upgraded with
the cluster stopped.

If upgrading an existing cluster, it is recommended to run "cibadmin --
upgrade" (or the equivalent in your higher-level tool of choice) both
before and after the upgrade.

Extensive details about the changes in this release are available in
the change log:

  https://github.com/ClusterLabs/pacemaker/blob/2.0/ChangeLog

and in a special wiki page for the 2.0 release:

  https://wiki.clusterlabs.org/wiki/Pacemaker_2.0_Changes

Highlights:

* Support has been dropped for heartbeat and corosync 1 (whether using
CMAN or plugin), and many legacy aliases for cluster options (including
default-resource-stickiness, which should be set as resource-
stickiness in rsc_defaults instead).

* The logs should be a little more user-friendly. The Pacemaker daemons
have been renamed for easier log searching. The default location of the
Pacemaker detail log is now /var/log/pacemaker/pacemaker.log, and
Pacemaker will no longer use Corosync's logging preferences.

* The master XML tag is deprecated (though still supported) in favor of
using the standard clone tag with a new "promotable" meta-attribute set
to true. The "master-max" and "master-node-max" master meta-attributes
are deprecated in favor of new "promoted-max" and "promoted-node-max"
clone meta-attributes. Documentation now refers to these as promotable
clones rather than master/slave, stateful or multistate clones.

* The record-pending option now defaults to true, which means pending
actions will be shown in status displays.

* The "Pacemaker Explained" document has grown large enough that topics
related to cluster administration have been moved to their own new
document, "Pacemaker Administration":

  http://clusterlabs.org/pacemaker/doc/

Many thanks to all contributors of source code to this release,
including Andrew Beekhof, Bin Liu, Bruno Travouillon, Gao,Yan, Hideo
Yamauchi, Jan Pokorný, Ken Gaillot, and Klaus Wenninger.
-- 
Ken Gaillot <kgaillot at redhat.com>