I am using Xena(Ubuntu 20.04) and want to upgrade to zed.

With my reading from 

I will do it like that:

Upgrade from Xena(20.04 container base) to Yoga(22.04 container base) then upgrade host to 22.04 >> Upgrade from Yoga to Zed..

*** Can you verify with me that we need  kolla-ansible upgrade first then upgrade the host?

Is that right?

I just thought about mariadb, how we can verify schema upgrade and rabbitmq will crash with the new version?

What will we do if something crashes like an upgrade database and rabbitmq failed?

Thank you. Regards