Fast forward upgrades

Fast Forward Upgrade steps This document will serve to record a suggested path (and gotchas) when performing a fast-forward upgrade (ffu), as well as link to relevant projects (triple-o, ansible, etc) documentation for ffu.

Preconditions

• Control plane will be down for the entire time of upgrade
• VMs should be accessible by customer
• Since control plane is down, operator can't do actions on existing instances (duh!)