[ClusterLabs] Coming in Pacemaker 2.1.0: newer versions of build dependencies

[Ken Gaillot]

Update: I've decided to bump Pacemaker's minimum dependencies higher.

This allows us to have a readily available platform to use with our
continuous integration testing, to ensure we support what we claim to,
rather than finding out much later after the fact that we broke some
build.

I'm now targeting support for building with dependencies available on
distribution releases from around 5 years ago (for example, Debian 8
"jessie", RHEL 7.2, and Ubuntu 16 "xenial").

The new requirements are:

* Python 3.4 or later
* automake 1.13 or later
* pkg-config 0.27 or later
* glib 2.42.0 or later
* libqb 0.17.0 or later
* GnuTLS 2.12.0 or later (if building Pacemaker Remote support)
* rpm 4.11.0 or later (if building RPMs) 

Separately, Pacemaker's support for Upstart-based resources will be
deprecated. Upstart has faded away and isn't available on platforms we
can easily test. While Pacemaker still supports it, as a practical
matter we'll accept pull requests from anyone using it who finds
problems, but we aren't going to spend development or testing time on
it ourselves. Support will likely be dropped in a few years.

On Mon, 2021-01-11 at 12:27 -0600, Ken Gaillot wrote:
> Hi all,
> 
> The Pacemaker 2.1.0 release, expected toward the middle of this year,
> will be fully backward compatible in both the CIB and the C API. The
> middle version number is being bumped to draw attention to more
> significant changes than usual, including changes that may affect
> custom scripts or building Pacemaker from source.
> 
> The new release will raise the required versions of certain build
> dependencies. All have been available for many years, even in slow-
> moving distributions, so it will only affect someone building the
> latest Pacemaker from source on a very old host.
> 
> The new dependency versions are:
> 
> * Python 3.2 or later (support for Python 2.7 has been removed)
> * glib 2.32.0 or later
> * libqb 0.17.0 or later
> * GnuTLS 2.12.0 or later (if building Pacemaker Remote support)
> * rpm 4.11.0 or later (if building RPMs)
> 
> In addition, the configure script has been cleaned up, with better
> messages, and dropping obsolete options.
> 
> If you build RPMs using "make rpm", note that generated RPMs will now
> be kept beneath rpm/ in the source directory rather than the usual
> default locations.
> 
> A big list of all changes for 2.1.0 can be found at:
> 
>  https://wiki.clusterlabs.org/wiki/Pacemaker_2.1_Changes
-- 
Ken Gaillot <kgaillot at redhat.com>