RHBA-2017:2695 - Bug Fix Advisory

Topic

Updated OpenStack Dashboard packages that resolve various issues are now
available for Red Hat Enterprise Linux OpenStack Platform 7.0 (Kilo) for
RHEL 7.

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 Dashboard

OpenStack Dashboard (horizon) provides administrators and users a graphical
interface to access, provision, and automate cloud-based resources. The
dashboard allows cloud administrators to get an overall view of the size
and state of the cloud, and it provides end-users a self-service portal to
provision their own resources within the limits set by administrators.

This update addresses the following issue:

• Previously, mod_wsgi used sub-interpreters, and the simplified GIL state API is not re-entrant. Horizon uses some binary modules compiled with a flag that makes them use the simplified GIL state API. Consequently, mod_wsgi would lock up and hang, making the dashboard unavailable.

This update adds "WSGIApplicationGroup %{GLOBAL}" to mod_wsgi configuration, forcing it to always use the main interpreter instead of sub-interpreters. As a result, mod_wsgi works correctly, regardless of the options used to compile the binary python modules. The slight performance penalty is not noticeable.

Solution

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

Red Hat Enterprise Linux OpenStack Platform 7 runs on Red Hat Enterprise
Linux 7.3.

The Red Hat Enterprise Linux OpenStack Platform 7 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 7,

including which channels need to be enabled and disabled.

The Release Notes are available at:
https://access.redhat.com/documentation/en/red-hat-enterprise-linux-openstack-platform/7/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 7 x86_64

Fixes

• BZ - 1479057 - Horizon won't load with OSP11 - Script timed out before returning headers: django.wsgi

CVEs

(none)

References

(none)