New notes on advanced upgrade/fallback for cluster
New notes on advanced upgrade/fallback for cluster

For clustered Keystone nodes it's possible to optimize the upgrade
process to minimize downtime. Additionally a process to quickly restore
after a failed upgrade are described.

Change-Id: I746d46a968dd887b0559644f91ae207055146390

ilay09/keystone,rajalokan/keystone,openstack/keystone,openstack/keystone,mahak/keystone,rajalokan/keystone,ilay09/keystone,rajalokan/keystone,mahak/keystone,openstack/keystone,mahak/keystone,ilay09/keystone