[ClusterLabs] Pacemaker release plans for 2.1.9 and 3.0.0

[Ken Gaillot]

Hi all,

The first Pacemaker 3 release will happen in a few months.

Pacemaker major version bumps indicate backward-incompatible changes
that may break rolling upgrades from certain earlier versions, as well
as changes that could affect user scripts or cluster behavior.

The changes in 3.0.0 mostly relate to deprecated and/or undocumented
features and the low-level C API, and shouldn't affect most users. The
full list of changes is on the ClusterLabs wiki:

https://projects.clusterlabs.org/w/projects/pacemaker/pacemaker_3.0_changes/

Next week, we will start the release process for 2.1.9, to give a clear
line between the 2 and 3 series. 2.1.8 just came out last month, but
we've made a number of fixes since then, and this ensures that the only
differences between 2.1.9 and 3.0.0 will be changes in backward
compatibility.

When the 2.1.9 final comes out around the beginning of November, we'll
release the first release candidate of 3.0.0.

Once 3.0.0 is released around the end of the year, the 3.0 series will
get all new primary development. Selected backward-compatible bug fixes
from each Pacemaker 3 release will be backported to the 2.1 series,
which will continue to get releases for probably another 3 to 5 years.
-- 
Ken Gaillot <kgaillot at redhat.com>