Managed to bring up python3 mgr. Here are some tests:
python3 ceph orchestrator host ls
: Fail
Error EINVAL: Traceback (most recent call last):
File "/usr/share/ceph/mgr/mgr_module.py", line 915, in _handle_command
return CLICommand.COMMANDS[cmd['prefix']].call(self, cmd, inbuf)
File "/usr/share/ceph/mgr/mgr_module.py", line 368, in call
return self.func(mgr, **kwargs)
File "/usr/share/ceph/mgr/orchestrator_cli/module.py", line 20, in wrapper