Migration from essex to havana
Hi,
I know that this question about migration from folsom to grizzly remains unanswered but I'll give it a go anyway.
We have an essex infrastructure in place. Any chance of migrating bits of this to a newer version of OpenStack ? If not, are there any recommended guidelines on how to make two infrastructures co-exist and the steps to take to "manually" migrate some machines from one to the other ?