RHBA-2018:2817 - Bug Fix Advisory

Topic

Updated OpenStack Compute packages that resolve various issues are now
available for Red Hat OpenStack Platform 10.0 (Newton) 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 Compute service

OpenStack Compute (nova) launches and schedules large networks of virtual
machines, creating a redundant and scalable cloud computing platform.
Compute provides the software, control panels, and APIs required to
orchestrate a cloud, including running virtual machine instances and
controlling access through users and projects.

Changes to the openstack-nova component:

• The hypervisor kernel thread can pre-empt Virtual CPUs (vCPUs) even with strong partitioning enabled (isolcpus, tuned). These pre-emptions are not frequent, but with 256 descriptors per virtio queue, even one single pre-emption of the vCPU can cause packet drop in network function virtualization (NFC) virtual machines that have a packet rate of 1 Mpps (1 million packets per second) or higher.

With this update, there are two new tunable options for configuring the RX queue size and TX queue size of virtio NICs and reducing packet drop:

• 'rx_queue_size'
• 'tx_queue_size' (BZ#1570949)

Solution

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

Red Hat OpenStack Platform 10 runs on Red Hat Enterprise Linux 7.5.

The Red Hat OpenStack Platform 10 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 10, 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/10/paged/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 10 x86_64

Fixes

• BZ - 1573803 - Fix setting tx_queue_size when rx_queue_size is not set
• BZ - 1625180 - [OSP-10] Nova puts virtio RX/TX Queue Size on SRIOV ports failing VM creation

CVEs

(none)

References

(none)