[ClusterLabs] Pacemaker packagers: important information about 2.0.0

[Ken Gaillot]

Some of this has been mentioned before, but to collect it all in one 
location, here is information of particular interest to distribution
packagers and users who build Pacemaker themselves:

* Should you stay on the 1.1 series or move to 2.0? See the following
list of factors to consider, primarily whether you need any of the
deprecated support that was removed, or you want a release that
includes deprecation warnings before removing support:

https://wiki.clusterlabs.org/wiki/Choosing_Between_Pacemaker_1.1_and_2.
0

* The daemons have been renamed.

The configure script has a new option, --enable-legacy-links. If
enabled (the default), symlinks will be installed at the old daemon
names pointing at the new ones.

This has two purposes: to allow older versions of tools (such as crm
shell and pcs) that directly invoke the old names for metadata etc. to
continue working; and to allow Pacemaker 1.1.17+ cluster nodes to host
bundles using a container image containing Pacemaker 2.0.0+. If you do
not need this support (most likely in the future when versions of the
tools that support the new names are available), you can specify --
disable-legacy-links.

* The default location of the detail log is now
/var/log/pacemaker/pacemaker.log (not directly in /var/log or sharing a
log with corosync).

* Compare the Pacemaker-1.1.18 pacemaker.spec.in file with the new one
to look for any changes you might want to reproduce. There have been
improvements in Python 3 support, etc.
-- 
Ken Gaillot <kgaillot at redhat.com>