[ClusterLabs] Antw: Pacemaker 1.1.16 - Release Candidate 1

Ulrich Windl Ulrich.Windl at rz.uni-regensburg.de
Fri Nov 4 03:29:46 EDT 2016

>>> Ken Gaillot <kgaillot at redhat.com> schrieb am 03.11.2016 um 17:08 in
<8af2ff98-05fd-a2c7-f670-58d0ff68ee55 at redhat.com>:
> ClusterLabs is happy to announce the first release candidate for
> Pacemaker version 1.1.16. Source code is available at:
> https://github.com/ClusterLabs/pacemaker/releases/tag/Pacemaker-1.1.16-rc1 
> The most significant enhancements in this release are:
> * rsc-pattern may now be used instead of rsc in location constraints, to
> allow a single location constraint to apply to all resources whose names
> match a regular expression. Sed-like %0 - %9 backreferences let
> submatches be used in node attribute names in rules.
> * The new ocf:pacemaker:attribute resource agent sets a node attribute
> according to whether the resource is running or stopped. This may be
> useful in combination with attribute-based rules to model dependencies
> that simple constraints can't handle.

I don't quite understand this: Isn't the state of a resource in the CIB status
section anyway? If not, why not add it? So it would be readily available for
anyone (rules, constraints, etc.).

> * Pacemaker's existing "node health" feature allows resources to move
> off nodes that become unhealthy. Now, when using
> node-health-strategy=progressive, a new cluster property
> node-health-base will be used as the initial health score of newly
> joined nodes (defaulting to 0, which is the previous behavior). This
> allows cloned and multistate resource instances to start on a node even
> if it has some "yellow" health attributes.

So the node health is more or less a "node score"? I don't understand the last
sentence. Maybe give an example?

> * Previously, the OCF_RESKEY_CRM_meta_notify_active_* variables were not
> properly passed to multistate resources with notification enabled. This
> has been fixed. To help resource agents detect when the fix is
> available, the CRM feature set has been incremented. (Whenever the
> feature set changes, mixed-version clusters are supported only during
> rolling upgrades -- nodes with an older version will not be allowed to
> rejoin once they shut down.)

Where can I find a description of current "CRM feature sets"?


> * Watchdog-based fencing using sbd now works on remote nodes.
> * The build process now takes advantage of various compiler features
> (RELRO, PIE, as-needed linking, etc.) that enhance security and start-up
> performance. See the "Hardening flags" comments in the configure.ac file
> for more details.
> * Python 3 compatibility: The Pacemaker project now targets
> compatibility with both python 2 (versions 2.6 and later) and python 3
> (versions 3.2 and later). All of the project's python code now meets
> this target, with the exception of CTS, which is still python 2 only.
> * The Pacemaker coding guidelines have been replaced by a more
> comprehensive addition to the documentation set, "Pacemaker
> Development". It is intended for developers working on the Pacemaker
> code base itself, rather than external code such as resource agents. A
> copy is viewable at
> http://clusterlabs.org/doc/en-US/Pacemaker/1.1-pcs/html-single/Pacemaker_Dev

> elopment/index.html
> As usual, the release includes many bugfixes, including a fix for a
> serious security vulnerability (CVE-2016-7035). For a more detailed list
> of changes, see the change log:
> https://github.com/ClusterLabs/pacemaker/blob/1.1/ChangeLog 
> 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. Due
> to the security fix, I intend to keep this release cycle short, so quick
> testing feedback is especially appreciated.
> Many thanks to all contributors of source code to this release,
> including Andrew Beekhof, Bin Liu, Christian Schneider, Christoph Berg,
> David Shane Holden, Ferenc Wágner, Yan Gao, Hideo Yamauchi, Jan Pokorný,
> Ken Gaillot, Klaus Wenninger, Kostiantyn Ponomarenko, Kristoffer
> Grönlund, Lars Ellenberg, Masatake Yamato, Michal Koutný, Nakahira
> Kazutomo, Nate Clark, Nishanth Aravamudan, Oyvind Albrigtsen, Ruben
> Kerkhof, Tim Bishop, Vladislav Bogdanov and Yusuke Iida. Apologies if I
> have overlooked anyone.
> -- 
> Ken Gaillot <kgaillot at redhat.com>
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