I have a multiserver infrastructure with more than 70 vm and one cp; further, in each site I have a VM with cp mysql db replica.
which is the correct strategy to migrate all of them from 18.104.22.168 to 3.0.5?
I argue that I should start from cp and then upgrade all the others 70 vm linkd to cp.
My questions are:
are database tables structure changed?
If they are as i can imagine, mail server will be unable to authenticate until i Upgrade ispconfig on them (I remember this when migrated by 3.4.3 to 22.214.171.124 and was changed password column or something similar)
when I upgrade cp, what happen to other VM? stop to sync until I upgrade them?
please share your experience if you have one