Appreciate the suggestion but this looks like a provisioning tool. Puppet is more or less good enough, it's the OS and its mutability which is our problem.

Maybe I read it wrong, I thought you were looking for fleet a management for bare metal. Anyone have any good suggestions of cockpit doesn’t fit the bill? https://www.redhat.com/sysadmin/intro-cockpit

It's been some time since I've happened across Cockpit on Ubuntu, but previous experience showed it was several major updates behind and lacked a lot of the functionality you see in the screenshots.