upgrade-compute.md

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.