nova cache is not configured on compute nodes

[Frank]

Issue:

Horizon VNC console fails with 'Failed to connect to server (Code:1006)'.

To reproduce:

Perform a default 3 controller HA setup with Fuel 9.0 from the latest iso.

Fix: According to the Mitaka release notes:

http://docs.openstack.org/releasenotes/nova/mitaka.html

"
Option memcached_servers is deprecated in Mitaka. Operators should use oslo.cache configuration instead. Specifically enabled option under [cache] section should be set to True and the url(s) for the memcached servers should be in [cache]/memcache_servers option.
"

On the controller nodes nova.conf contains:

"
memcached_servers = 192.168.0.8:11211,192.168.0.9:11211,192.168.0.10:11211
"

Comment this line out and add the following under the "cache" heading in nova.conf:

"
enabled = true
memcache_servers = 192.168.0.8:11211,192.168.0.9:11211,192.168.0.10:11211
backend = oslo_cache.memcache_pool
"

After restarting nova the console will function correctly in Horizon.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/338373

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/338373
Committed: https://git.openstack.org/cgit/openstack/fuel-library/commit/?id=69aece333bd3505bc702e24a02f9602b71069206
Submitter: Jenkins
Branch: master

commit 69aece333bd3505bc702e24a02f9602b71069206
Author: Alex Schultz <email address hidden>
Date: Wed Jul 6 09:59:24 2016 -0600

    Properly configure nova cache for compute

    This change properly pulls in the nova::cache configuration for
    the compute role.

    Change-Id: Ia54aaf6e2b93e2acdbe66314771e88a59c303206
    Closes-Bug: #1599559

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/mitaka
Review: https://review.openstack.org/340573

[Andrey Lavrentyev (alavrentyev)]

Verified on 9.1 snapshot #319

[root@nailgun ~]# shotgun2 short-report
cat /etc/fuel_build_id:
 495
cat /etc/fuel_build_number:
 495
cat /etc/fuel_release:
 9.0
cat /etc/fuel_openstack_version:
 mitaka-9.0

UBUNTU_MIRROR_ID=ubuntu-2016-09-14-213640
CENTOS_MIRROR_ID=centos-7.2.1511-2016-05-31-083834
MOS_UBUNTU_MIRROR_ID=9.0-2016-09-27-152320
MOS_CENTOS_OS_MIRROR_ID=os-2016-06-23-135731
MOS_CENTOS_PROPOSED_MIRROR_ID=proposed-2016-09-27-152320
MOS_CENTOS_UPDATES_MIRROR_ID=updates-2016-06-23-135916
MOS_CENTOS_HOLDBACK_MIRROR_ID=holdback-2016-06-23-140047
MOS_CENTOS_HOTFIX_MIRROR_ID=hotfix-2016-09-23-124321
MOS_CENTOS_SECURITY_MIRROR_ID=security-2016-06-23-140002

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/fuel-library 10.0.0rc1 release candidate.

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/fuel-library 10.0.0 release.