3b44e60f85
Our setup only use one galera node for openstack, due to this issue: http://osdir.com/ml/openstack-dev/2014-05/msg01269.html But nova allow to run certain safe read request on other nodes We can enable this feature by using: cloud::compute::nova_db_use_slave = true cloud::loadbalancer::galera_slave = true The loadbalancer creates a new mysql service on port 3307 that uses only backup galera nodes (and the main node as backup) to serve nova slave connection.