In this scenario, you will take down all of your OpenStack services at the same time, and will not bring them back up until the upgrade process is complete.
On all of your hosts:
-
Install the Juno yum repository.
-
Perform a complete upgrade of all packages:
# yum upgrade -
Perform database schema upgrades for all of your services.
-
Review newly installed configuration files.
The upgraded packages will have installed
.rpmnewfiles appropriate to the Juno version of the service. In general, the Juno services will run using the configuration files from your Icehouse deployment, but you will want to review the.rpmnewfiles for any required changes.