Ceph » mgr

parent tracker for related fixes needed for distros with python 3.12+

This is a very general problem. python3.12 appears to have significantly changed how subinterpreters work. ceph-mgr internally passes objects between subinterpreters freely, which now can cause crashes. Moreover, there are dependencies (py03) which no longer tolerate being imported in a submodule.

We don't yet really know the extent of the problem here. The initial fixes are:
1. https://github.com/ceph/ceph/pull/66244 -- default to running submodules in the main interpreter
2. https://github.com/ceph/ceph/pull/66240 -- serialize objects passed between subinterpreters

1 is the important one here, and will be the one we focus on for tentacle. 2 will be a followup to allow us to break certain modules back into subinterpreters with seperate GILs (allowed in 3.12, likely the reason for the change) for better concurrency.

1 has shown that a bunch of modules depend on magic using interpreter-wide globals. We're working on refactoring that to make 1 effective.

Once 1 is working with refactors to avoid globals, testing may turn up further 3.12 related problems to address.