At Paypal, we spent more than one year to upgrade all our Openstack deployments from folsom/grizzly to havana. In this talk, we would like to share the lessons we learned the hard way from the previous upgrade, and how we plan to change the process starting from kilo upgrade. Our final target is to bring Paypal's openstack cloud up to date with upstream and to continuously integrate with upstream.
Code chagne for juno is a fix forward for commits in havana,
To cheery-pick each change, it needs to go through a CICD cycle, functional testing and integration testing cycle