Incremental upgrades are major version to major version upgrades that leverage the upstream run-upgrade.sh script provided in each release of Openstack Ansible. They are used for releases for releases Newton and on. They allow a stairstep approach to upgrading the environment.
Supported incremental upgrades (must be running on Ubuntu 16.04):
- Newton to Pike (Ocata is skipped)
- Newton to Queens
The status of supported versions can be viewed from the periodic jobs located on the RPC Jenkins server.
- Verify that the deployment is healthy and at the latest version.
- Perform database housekeeping to prevent unnecessary migrations.
Executing an incremental upgrade ----------------------------
The first step is to checkout the rpc-upgrades repo.
git clone https://github.com/rcbops/rpc-upgrades.git /opt/rpc-upgradesThe next step is to execute the incremental upgrade script and follow the prompts:
cd /opt/rpc-upgrades/incremental
./incremental-upgrade.sh <target release>The target release will be the destination release you want to upgrade to.
In the event you would like to simulate an incremental upgrade, follow the instructions in the testing document. Using vagrant, it will set up an AIO deployment of the desired version which can then be leapfrog upgraded. This allows you to test the scenario in the lab or development environment before actually running the upgrade on a production deployment.