RHBA-2015:0976 - 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 the votequorum subsystem of Corosync, the auto_tie_breaker_node option was

implemented in such a way that the option was incorrectly required to be present
for the auto_tie_breaker option to function. As a consequence, older systems
that had auto_tie_breaker enabled had the auto_tie_breaker_node option disabled
when they were upgraded to a new version, and new systems with auto_tie_breaker
enabled did not use the "Auto Tie Breaker" algorithm. This update ensures that
auto_tie_breaker_node is optional, which makes auto_tie_breaker independent of
auto_tie_breaker_node and also backwards compatible. (BZ#1205336)

• Previously, Corosync allowed the two_node option and the auto_tie_breaker

option to exist in the corosync.conf file at the same time. As a consequence, if
both options were included, auto_tie_breaker was silently ignored and the
two_node fence race decided which node would survive in the event of a
communication break. With this update, if both two_node and auto_tie_breaker are
detected in corosync.conf, Corosync issues a message at start-up and disables
two_node mode. In addition, the pcs daemon has been fixed so that it does not
produce corosync.conf files with both options included. As a result,
auto_tie_breaker effectively overrides two_node mode if both options are
specified. (BZ#1205338)

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

CVEs

(none)

References

(none)