Honestly, I don't know that anyone has ever tried, but I have a feeling it might not work out well. The 'repo' is specified at the stack level, so you'd have to make a new cluster after modifying the repo url on the stack in order for the new nodes to even know to use a different repo from the old nodes for installing packages. Also, the os_family and os_type is in the ambari-server configs and isn't overrideable per-node, unless there's some hidden feature I'm not aware of.
Your best option is probably to spin up a new cluster with the new OS and migrate the data. Greg On 1/13/16, 6:20 PM, "Andrew Robertson" <andyrobertson...@gmail.com> wrote: >Has anyone ever tried to run an Ambari cluster with hosts at different >centos versions (or some nodes with one OS like centos and other nodes >with something else?) > >Any reason this wouldn't be advised? > >I'm considering upgrading from centos 6 -> centos 7. Given the >current centos 6 -> 7 upgrade path is "reinstall", this make take some >time to accomplish and I'd end up with a mix of both machine types in >the cluster during this time. > >I don't see any reasons this would not work - but I also don't see >anything that explicitly states this is a tested/advised config >either. > >Thanks!
