RHBA-2006:0505 - Bug Fix Advisory

Topic

Updated Red Hat Cluster Manager packages that fix various bugs and provide
enhancements are now available for Red Hat Cluster Suite on Red Hat
Enterprise Linux 3.

Description

Red Hat Cluster Manager provides high availability of critical server
applications in the event of planned or unplanned system downtime.

Various bugs in Red Hat Cluster Manager have been discovered and addressed
since the release of Red Hat Enterprise Linux 3. Several bug fixes and
enhancements are included in these packages, including:

• Added ability to cleanly preserve quorum with disk tiebreaker in a

network partition. See the cludb manual page ('man cludb') for
documentation on how to enable this feature.

• Enabled user and group disk quotas if 'usrquota' or 'grpquota' is

specified in the filesystem mount options

• Allowed relocation of dead services without a local restart by setting

max restarts to a negative value for a given service

• Added ability to kill lockd if unmount fails during NFS service

transitions. See the cludb manual page ('man cludb') for documentation on
how to enable this feature.

• clumanager now waits for all service children to exit before main service

manager exits.

Users of Red Hat Cluster Manager are advised to upgrade to these updated
packages, which applies these enhancements and bug fixes.

Solution

Performing a Cluster Upgrade

Notes (Before you begin):

• All cluster members must be running and participating in the cluster

quorum, or no members should be running at all.

• An ideal time to perform this upgrade would be during scheduled

maintenance and/or when it will impact the fewest number of users.

• Switching to or from the netlink-based IP management utilities (available

in versions 1.2.27 and later) has a significant impact on the way
services are handled, and must be done with all cluster services
disabled, but with all cluster nodes participating in the cluster
quorum. Refer to the cludb man page for more information.

• Disabling ARP checking is only recommended for users who see "Not in

subnet" errors. This feature requires each node to be restarted, and
may require manual copying of /etc/cluster.xml to each member.
Refer to the cludb man page for more information.

Steps (with all cluster members running):

(1) Run the following command:

# cludb -g members%member0%name

The host displayed is the lowest-ordered cluster member. This member must
be upgraded *last*.

If this member is "not found", open the /etc/cluster.xml file and look for
the "member" tag with the lowest "id" property; this is the lowest-ordered
member. Make a note of this member; this member must be upgraded last.

(2) Run 'rpm -Fvh [filenames]' (as noted above) on all cluster members
except the member noted in step (1), one at a time. Do not execute this
command on multiple members simultaneously, as the upgrade process disables
a member temporarily (removing it from the cluster quorum). If too many
members are disabled simultaneously, the cluster quorum will no longer
exist, forcing services managed by the cluster software to become
unavailable.

Services located on a member that is being upgraded will migrate to other
cluster members whenever possible.

(3) Run 'rpm -Uvh [filenames]' on the member noted in step (1).

(4) If desired, balance cluster services across available members using
redhat-config-cluster or clusvcadm.

(5) Run 'chkconfig --add clumanager' on all members.

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

To update all RPMs for your particular architecture, run:

rpm -Fvh [filenames]

where [filenames] is a list of the RPMs you wish to upgrade. Only those
RPMs which are currently installed will be updated. Those RPMs which are
not installed but included in the list will not be updated. Note that you
can also use wildcards (*.rpm) if your current directory *only* contains
the desired RPMs.

Please note that this update is also available via Red Hat Network. Many
people find this an easier way to apply updates. To use Red Hat Network,
launch the Red Hat Update Agent with the following command:

up2date

This will start an interactive process that will result in the appropriate
RPMs being upgraded on your system.

If up2date fails to connect to Red Hat Network due to SSL
Certificate Errors, you need to install a version of the
up2date client with an updated certificate. The latest version of
up2date is available from the Red Hat FTP site and may also be
downloaded directly from the RHN website:

https://rhn.redhat.com/help/latest-up2date.pxt

Affected Products

• Red Hat Enterprise Linux High Availability for x86_64 3 x86_64
• Red Hat Enterprise Linux High Availability for x86_64 3 ia64
• Red Hat Enterprise Linux High Availability for x86_64 3 i386

Fixes

• BZ - 180969 - RFE: Add the ability for clumanager to relocate dead services without restarting locally
• BZ - 188023 - active NFS POSIX locks prevent umount from occuring during failover

CVEs

(none)

References

(none)