RHBA-2019:0946 - Bug Fix Advisory

Topic

Updated OpenStack Block Storage packages that resolve various issues are
now available for Red Hat OpenStack Platform 14.0 (Rocky) 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:

• Prior to this update, when `destroy_empty_storage_group` was enabled and a storage group was destroyed after it was emptied, the VNX driver or storops cache was not updated and the driver did not recreate the storage group upon subsequent attachment. The storage group cache was not updated, causing the subsequent attachment of volumes to the same host to fail.

With this update, the storage group is updated with poll after deleting it. The storage group is not deleted from cache explicitly, but the status is set to `not-exist`. As a result, subsequent attaching creates the storage group if the latest status is `not-exist`. (BZ#1684220)

• The following corrections were made to improve operations with volumes:
• The attachment create create call has been modified to return SUCCESS as opposed to HTTP ACCEPTED as it's a blocking call.
• The multi-attach and retype flags on volumes are now handled correctly by the API.
• Previously, read-only volumes were incorrectly converted to read-write. Now, migrated read-only volumes maintain read-only mode.
• The Cinder API now does status checks when updating attachment objects on a volume. Calls on volumes in an error state result in an 'invalid Volume' exception. (BZ#1691369)

Solution

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

Red Hat OpenStack Platform 14 runs on Red Hat Enterprise Linux 7.6.

The Red Hat OpenStack Platform 14 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 14, including which

channels need to be enabled and disabled.

The Release Notes are available at:
https://access.redhat.com/documentation/en/red-hat-openstack-platform/

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 14 ppc64le
• Red Hat OpenStack 14 x86_64

Fixes

• BZ - 1684220 - [OSP14] When a a storagegroup is destroyed because it's empty, VNX driver doesn't recreate it upon subsequent attachment
• BZ - 1691369 - [OSP14] fixes related to multi-attach
• BZ - 1692607 - Rebase openstack-cinder to 96329a6

CVEs

(none)

References

(none)