[ClusterLabs] Pacemaker 1.1.17 released
kgaillot at redhat.com
Thu Jul 6 15:54:21 EDT 2017
ClusterLabs is proud to announce the latest release of the Pacemaker
cluster resource manager, version 1.1.17. The source code is available at:
The most significant enhancements in this release are:
* A new "bundle" resource type simplifies launching resources inside
Docker containers. This feature is considered experimental for this
release. It was discussed in detail previously:
A walk-through is available on the ClusterLabs wiki for anyone who wants
to experiment with the feature:
* A new environment variable PCMK_node_start_state can specify that a
node should start in standby mode. It was also discussed previously:
* The "crm_resource --cleanup" and "crm_failcount" commands can now
operate on a single operation type (previously, they could only operate
on all operations at once). This is part of an underlying switch to
tracking failure counts per operation, also discussed previously:
* Several command-line tools have new options, including "crm_resource
--validate" to run a resource agent's validate-all action,
"stonith_admin --list-targets" to list all potential targets of a fence
device, and "crm_attribute --pattern" to update or delete all node
attributes matching a regular expression
* The cluster's handling of fence failures has been improved. Among the
changes, a new "stonith-max-attempts" cluster option specifies how many
times fencing can fail for a target before the cluster will no longer
immediately re-attempt it (previously hard-coded at 10).
* The new release has scalability improvements for large clusters. Among
the changes, a new "cluster-ipc-limit" cluster option specifies how
large the IPC queue between pacemaker daemons can grow.
* Location constraints using rules may now compare a node attribute
against a resource parameter, using the new "value-source" field.
Previously, node attributes could only be compared against literal
values. This is most useful in combination with rsc-pattern to apply the
constraint to multiple resources.
As usual, to support the new features, the CRM feature set has been
incremented. This means that mixed-version clusters are supported only
during a rolling upgrade -- nodes with an older version will not be
allowed to rejoin once they shut down.
For a more detailed list of bug fixes and other changes, see the change log:
Many thanks to all contributors of source code to this release,
including Alexandra Zhuravleva, Andrew Beekhof, Aravind Kumar, Eric
Marques, Ferenc Wágner, Yan Gao, Hayley Swimelar, Hideo Yamauchi, Igor
Tsiglyar, Jan Pokorný, Jehan-Guillaume de Rorthais, Ken Gaillot, Klaus
Wenninger, Kristoffer Grönlund, Michal Koutný, Nate Clark, Patrick
Hemmer, Sergey Mishin, Vladislav Bogdanov, and Yusuke Iida. Apologies if
I have overlooked anyone.
Ken Gaillot <kgaillot at redhat.com>
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