Upgrade compute hosts

On each compute host:

  1. Stop all OpenStack services on the host:

     openstack-service stop

  2. Upgrade all packages:

     yum upgrade

  3. If you wish to perform a rolling upgrade of your compute servers, set Nova API version limits to allow your Juno compute hosts to inter-operate with your Kilo compute hosts and controllers.

  4. Start all openstack services on the host:

     openstack-service start

When you have upgraded all of your compute hosts, remove the API limits on both your compute hosts and on your controllers.