RHBA-2015:1789 - Bug Fix Advisory

Topic

Updated corosync packages that fix two bugs are now available for Red Hat
Enterprise Linux 7.

Description

The corosync packages provide the Corosync Cluster Engine and C APIs for Red Hat
Enterprise Linux cluster software.

This update fixes the following bugs:

• In previous versions of Corosync, real time (RT) scheduling priority was not

enabled by default. This could increase the possibility of token losses when
systems were under heavy CPU load. This change enables RT scheduling for
Corosync by default, which reduces the chance of token losses. (BZ#1260002)

• Prior to this update, in clusters with an odd number of nodes that had the

auto_tie_breaker option enabled, when one of the nodes failed, the remaining
nodes were split 50:50. Consequently, auto_tie_breaker was not invoked and a
random half of the cluster was fenced, rather than the half that did not contain
the tie breaker node. With this update, the wait_for_all option is required for
clusters with an odd number of nodes. As a result, the cluster half that does
not contain the tie breaker node is now fenced in the described scenario.
(BZ#1260719)

Users of corosync are advised to upgrade to these updated packages, which fix
these bugs.

Solution

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

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258

Affected Products

• Red Hat Enterprise Linux High Availability for x86_64 7 x86_64
• Red Hat Enterprise Linux High Availability for x86_64 - Extended Update Support 7.7 x86_64
• Red Hat Enterprise Linux High Availability for x86_64 - Extended Update Support 7.6 x86_64
• Red Hat Enterprise Linux High Availability for x86_64 - Extended Update Support 7.5 x86_64
• Red Hat Enterprise Linux High Availability for x86_64 - Extended Update Support 7.4 x86_64
• Red Hat Enterprise Linux High Availability for x86_64 - Extended Update Support 7.3 x86_64
• Red Hat Enterprise Linux High Availability for x86_64 - Extended Update Support 7.2 x86_64
• Red Hat Enterprise Linux High Availability for x86_64 - Extended Update Support 7.1 x86_64
• Red Hat Enterprise Linux Resilient Storage for x86_64 7 x86_64
• Red Hat Enterprise Linux Resilient Storage for x86_64 - Extended Update Support 7.7 x86_64
• Red Hat Enterprise Linux Resilient Storage for x86_64 - Extended Update Support 7.6 x86_64
• Red Hat Enterprise Linux Resilient Storage for x86_64 - Extended Update Support 7.5 x86_64
• Red Hat Enterprise Linux Resilient Storage for x86_64 - Extended Update Support 7.4 x86_64
• Red Hat Enterprise Linux Resilient Storage for x86_64 - Extended Update Support 7.3 x86_64
• Red Hat Enterprise Linux Resilient Storage for x86_64 - Extended Update Support 7.2 x86_64
• Red Hat Enterprise Linux Resilient Storage for x86_64 - Extended Update Support 7.1 x86_64
• Red Hat Enterprise Linux High Availability (for RHEL Server) from RHUI 7 x86_64
• Red Hat Enterprise Linux Resilient Storage (for RHEL Server) from RHUI 7 x86_64
• Red Hat Enterprise Linux High Availability for x86_64 - Update Services for SAP Solutions 7.7 x86_64
• Red Hat Enterprise Linux High Availability for x86_64 - Update Services for SAP Solutions 7.6 x86_64
• Red Hat Enterprise Linux High Availability for x86_64 - Update Services for SAP Solutions 7.4 x86_64
• Red Hat Enterprise Linux High Availability for x86_64 - Update Services for SAP Solutions 7.3 x86_64
• Red Hat Enterprise Linux High Availability for x86_64 - Update Services for SAP Solutions 7.2 x86_64
• Red Hat Enterprise Linux High Availability for x86_64 - Extended Life Cycle Support 7 x86_64
• Red Hat Enterprise Linux Resilient Storage for x86_64 - Extended Life Cycle Support 7 x86_64

Fixes

• BZ - 1260719 - auto_tie_breaker can create two quorate clusters

CVEs

(none)

References

(none)