Handle rolling upgrade when ASG desired capacity has reached max size #4
Description
This is a bit tricky, because if, for instance, the max is 1 and there's a desired size of 1 before the upgrade, it would be fine to increase the ASG by 1 temporarily, let the new instance spin up, evict it, delete the old node and set decrease the ASG back to 1, but what if there's not enough space in the 1 new instance (i.e. if the instance type changed)? Then should we keep increasing? But then that would mean we wouldn't be able to go back to the original max size of the ASG.