You upgrade to VMware Integrated OpenStack 4.1 by migrating to a new deployment or by applying a patch. The upgrade path depends on the version of VMware Integrated OpenStack that you are currently running.
You can upgrade from VMware Integrated OpenStack 3.1 or 4.0 to VMware Integrated OpenStack 4.1. If you are running a version older than 3.1, first upgrade to 3.1 and then upgrade to 4.1.
To upgrade from VMware Integrated OpenStack 3.1, follow the procedure described in Upgrade VMware Integrated OpenStack. In this procedure, you create a VMware Integrated OpenStack 4.1 deployment and migrate your 3.1 deployment to it. This procedure requires that you have sufficient hardware and IP address resources to support two deployments temporarily.
To upgrade from VMware Integrated OpenStack 4.0, follow the procedure described in Patch VMware Integrated OpenStack. In this procedure, you use the viopatch utility to install the 4.1 patch on your existing deployment.
You can revert to the pre-upgrade version if the upgrade is not successful or if you no longer want to use version 4.1. To revert an upgrade, see Revert to a Previous VMware Integrated OpenStack Deployment. To roll back a patch, see Roll Back a VMware Integrated OpenStack Patch.
