Description of problem: Nova novnc console fails to load 2/3 requests in an HA environment with 3 controllers. The issue seems pretty much the same as the one reported in BZ#1238336 Version-Release number of selected component (if applicable): openstack-tripleo-heat-templates-2.0.0-8.el7ost.noarch How reproducible: 100% Steps to Reproduce: 1. Deploy overcloud 2. Log in to Horizon 3. Access instance console Actual results: 2/3 times you get the following message: Failed to connect to server (code: 1006) Expected results: The noVNC console always gets loaded. Additional info: The memcached servers are set in nova.conf: [root@overcloud-controller-0 heat-admin]# grep memcached_servers /etc/nova/nova.conf # "memcached_servers" opt is deprecated in Mitaka. In Newton release oslo.cache #memcached_servers=<None> #memcached_servers=<None> memcached_servers=10.0.0.15:11211,10.0.0.14:11211,10.0.0.13:11211
In Mitaka the memcached_servers option got deprecated: http://docs.openstack.org/releasenotes/nova/mitaka.html I tried the following workaround on master and it fixed the issue for me: On controller nodes in /etc/nova/nova.conf add this cache section: [cache] backend = oslo_cache.memcache_pool enabled = true memcache_servers = 10.0.0.15:11211,10.0.0.14:11211,10.0.0.13:11211
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://rhn.redhat.com/errata/RHEA-2016-1599.html