RHBA-2019:0560 - Bug Fix Advisory

Topic

Updated OpenStack Block Storage packages that resolve various issues are
now available for Red Hat OpenStack Platform 13.0 (Queens) for RHEL 7.

Description

Red Hat OpenStack Platform provides the facilities for building, deploying
and monitoring 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.

Changes to the openstack-cinder component:

• Previously, workload support was dropped from the VMAX All Flash array, but the Cinder vmax drivers were not updated to be aware of this. As a result, if a VMAX All Flash array was upgraded to 5978 or greater and existing volume types leveraged workload (for example, DSS, DSS_REP, OLTP, and OLTP_REP), certain operations failed and the volume type was unusable.

With this update, The Cinder driver code determines whether workload support is available for the VMX All Flash array. If a volume type defines workload settings, these are set to `None` and a warning is logged. As a result, VMAX All Flash arrays upgraded to ucode 5978 or greater work with volume types that define workload settings. The settings have no effect and it is recommended that new volume types be created without workloads specified. (BZ#1664391)

• Previously, when performing image operations in Cinder, users experienced errors on RabbitMQ and DB connections because file I/O operations blocked greenthreads, preventing switching to another greenthread on I/O. As a result, the cinder-volume service was `down` when creating an image from a volume.

With this update, image operations that can prevent greenthread switching are executed in native threads. As a result, the cinder-volume service no longer appears `down` to the scheduler. (BZ#1646940)

• Previously, a code change in the Pike release introduced a regression, causing Cinder to ignore some IOError exceptions that the glanceclient raised when downloading an image. If one of these ignored exceptions occurred, a volume could be created with truncated or corrupt data.

With this update, the code was modified and these exceptions are no longer ignored. As a result, when an IOError occurs during image download, Cinder logs and handles the exception correctly. (BZ#1659264)

Solution

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

Red Hat OpenStack Platform 13 runs on Red Hat Enterprise Linux 7.6.

The Red Hat OpenStack Platform 13 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 OpenStack Platform 13, including which

channels need to be enabled and disabled.

The Release Notes are available at:
https://access.redhat.com/documentation/en-us/red_hat_openstack_platform/13/html/release_notes/

This update is available through 'yum update' on systems registered through
Red Hat Subscription Manager. For more information about Red Hat
Subscription Manager, see:

https://access.redhat.com/documentation/en-US/Red_Hat_Subscription_Management/1/html/RHSM/index.html

Affected Products

• Red Hat OpenStack for IBM Power 13 ppc64le
• Red Hat OpenStack 13 x86_64

Fixes

• BZ - 1646940 - cinder-volume service will become down when creating image from volume
• BZ - 1659264 - [RHOS 13] cinder ignores errors from glanceclient when creating volumes
• BZ - 1665452 - [OSP13] fixed_key value is logged in the cinder logs
• BZ - 1670141 - Rebase openstack-cinder to 736bff0

CVEs

(none)

References

(none)