RHBA-2011:0642 - Bug Fix Advisory

Topic

Updated pacemaker packages that fix various bugs and add one enhancement are now
available for Red Hat Enterprise Linux 6.

Description

Pacemaker is a high-availability cluster resource manager with a powerful policy
engine.

This update fixes the following bugs:

• The pacemaker packages have been upgraded to upstream version 1.1.5, which

provides a number of bug fixes over the previous version. (BZ#668466)

• Due to missing Cluster Resource Manager (CRM) scripts, an attempt to run the

crm utility caused the following message to be presented to a user:

crm_standby not available, check your installation

This update re-includes the "crm_master" in the packemaker package, and adapts
the crm utility not to require the "crm_standby" and "crm_failcount" scripts, so
that the above error message is no longer displayed. (BZ#627626)

• In a cluster environment managed by both Pacemaker and the CMAN cluster

management subsystem, frequent leaving and joining of a node could cause
Pacemaker's quorum view to be incorrect. This update applies a patch that
addresses this issue, so that the leaving and joining of a node no longer causes
Pacemaker's quorum view to be different from CMAN's. (BZ#684825)

• Previously, rebooting a node in a CMAN managed cluster could cause the fencing

daemon to keep the "fenced:default" CPG group on the remaining nodes, leaving
the cluster in an inconsistent state. With this update, an upstream patch has
been applied to address this issue. As a result, when a node is rebooted and
leaves a cluster, the cluster resources correctly run on remaining nodes.
(BZ#684838)

As well, this update adds the following enhancements:

• When using the fence_ipmilan fencing agent, Pacemaker now accepts "diag" as a

valid per-device stonith action. With this action enabled, a fenced node
receives the "DIAG" signal and creates a dump for diagnostic purposes.
(BZ#676286)

Note that Pacemaker provides the following functionality, and is now the
preferred application to perform these tasks:

• Pacemaker provides support for a time-based resource control. This allows

system administrators to define the time a resource is down. (BZ#310361)

• Pacemaker supports time-based resource control. This allows system

administrators to define the downtime of individual resources. (BZ#449833)

• Pacemaker allows users to manually start or stop cluster resources. This

enables system administrators to perform maintenance tasks on individual
components within a service. (BZ#449835)

All users of pacemaker are advised to upgrade to these updated packages, which
fix these and other bugs, and add this enhancement. Note that pacemaker is
considered a Technology Preview in Red Hat Enterprise Linux 6.

Solution

Before applying this update, make sure that all previously-released errata
relevant to your system have been applied.

This update is available via Red Hat Network. Details on how to use the Red
Hat Network to apply this update are available at
https://access.redhat.com/kb/docs/DOC-11259

Affected Products

• Red Hat Enterprise Linux Server 6 x86_64
• Red Hat Enterprise Linux Server 6 i386
• Red Hat Enterprise Linux Workstation 6 x86_64
• Red Hat Enterprise Linux Workstation 6 i386
• Red Hat Enterprise Linux Desktop 6 x86_64
• Red Hat Enterprise Linux Desktop 6 i386
• Red Hat Enterprise Linux for Scientific Computing 6 x86_64
• Red Hat Enterprise Linux High Availability for x86_64 6 x86_64
• Red Hat Enterprise Linux High Availability for x86_64 6 i386
• Red Hat Enterprise Linux Resilient Storage for x86_64 6 x86_64
• Red Hat Enterprise Linux Resilient Storage for x86_64 6 i386
• Red Hat Enterprise Linux Server from RHUI 6 x86_64
• Red Hat Enterprise Linux Server from RHUI 6 i386
• Red Hat Enterprise Linux High Availability (for RHEL Server) from RHUI 6 x86_64
• Red Hat Enterprise Linux High Availability (for RHEL Server) from RHUI 6 i386
• Red Hat Enterprise Linux Resilient Storage (for RHEL Server) from RHUI 6 x86_64
• Red Hat Enterprise Linux Resilient Storage (for RHEL Server) from RHUI 6 i386
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 6 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 6 i386

Fixes

• BZ - 627626 - Missing some crm_foo
• BZ - 668466 - Rebase pacemaker from upstream
• BZ - 676286 - [RFE] Add per device 'diag' option to pacemaker stonith action
• BZ - 684825 - [PATCH] Fix pacemaker's wrong quorum view in a CMAN+pacemaker cluster
• BZ - 684838 - After fencing of a failed node 'fenced' daemon leaves 'fenced:default' cpg on all remaining nodes

CVEs

(none)

References

(none)