RHBA-2015:1759 - Bug Fix Advisory

Topic

Updated OpenStack Block Storage packages that resolve various issues are
now available for Red Hat Enterprise Linux OpenStack Platform 5.0
(Icehouse) for RHEL 6.

Description

Red Hat Enterprise Linux OpenStack Platform provides the facilities for
building a private or public infrastructure-as-a-service (IaaS) cloud
running on commonly available physical hardware. This advisory includes
packages for:

• OpenStack Block Storage service

OpenStack Block Storage (cinder) manages block storage mounting and the
presentation of such mounted block storage to instances. The back-end
physical storage can consist of local disks, Fiber Channel, iSCSI, and/or
NFS mounts attached to Compute nodes. In addition, Block Storage supports
volume backups, and snapshots for temporary save and restore operations.
Programmatic management is available through the Block Storage service's
API.

With this update, the Block Storage service is now re-based to upstream
version 2014.1.5 (BZ#1254717). This applies several fixes, including:

• In previous releases, LIO used the iSCSI targets table, which was

unnecessary. As a result, quick attach/detach sequences incorrectly
filled the table and resulted in an attachment failure. This, in
turn, meant that lioadm target creation was artificially limited by
iscsi_num_targets.

With this release, LIO no longer uses the target table. As a result,
LIO is no longer limited by iscsi_num_targets. (BZ#1244548)

• Previously, iSCSI settings were not saved in the underlying

operating system. This resulted in empty configurations for iSCSI
targets; this, in turn, cleared the iSCSI targets upon
start/restart. With this update, iSCSI changes in target.service
default configuration are now persistent, thereby ensuring that
iSCSI targets are not cleared upon start/restart.
(BZ#1254746 and BZ#1254753)

• Previous releases did not have synchronized access to configfs in

rtslib. This made it possible for rtstool or rtslib to attempt
access to an element that had just been removed mid-loop by another
Block Storage request (and was, therefore, non-existent). This, in
turn, could result in any of the following exceptions:

• .dump()
• KeyError
• IOError
• RTSLibError on storage_object

This release implements synchronized access to all rtstool calls
that access or modify configfs. With this, concurrent access from
multiple threads and processes now work consistently. (BZ#1254755)

• Previous versions of the iSCSI base driver contained target helper

calls that were inappropriate for some drivers. These calls could
cause attachment failures on some back ends.

This update moves those target helper calls to the right place,
thereby avoiding any unexpected attachment failures. (BZ#1254756)

Solution

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

Red Hat Enterprise Linux OpenStack Platform 5 runs on Red Hat Enterprise
Linux 6.7.

The Red Hat Enterprise Linux OpenStack Platform 5 Release Notes contain the
following:

• An explanation of the way in which the provided components interact to

form a working cloud computing environment.

• Technology Previews, Recommended Practices, and Known Issues.
• The channels required for Red Hat Enterprise Linux OpenStack Platform 5,

including which channels need to be enabled and disabled.

The Release Notes are available at:
https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Linux_OpenStack_Platform/5/html/Release_Notes/index.html

This update is available through the Red Hat Network. Details on how to use
the Red Hat Network to apply this update are available at
https://access.redhat.com/site/articles/11258

Affected Products

• Red Hat OpenStack 5.0 for RHEL 6 x86_64

Fixes

• BZ - 1244548 - lioadm target creation artificially limited by iscsi_num_targets
• BZ - 1254717 - Rebase openstack-cinder to 2014.1.5
• BZ - 1254739 - [RHS-RHOS] Mount options specified in glusterfs_shares_config not applied when cinder-volume is restarted
• BZ - 1254755 - Cinder LVM iSCSI driver with LIO helper fails to handle multiple concurrent requests to attach/detach volumes
• BZ - 1254756 - Remove iscsi_helper calls from base iscsi driver
• BZ - 1255029 - Exceptions dropped by volume manager when creating exports
• BZ - 1256740 - Detached volume loses its sparseness after Cinder side migration between different NetApp shares

CVEs

(none)

References

• http://www.redhat.com/security/updates/classification/#normal