Editing Ceph Storage Cluster (section)

== Troubleshooting ==

If you get the error:
 Error ENOENT: Module not found

... or some variation of it, especially when trying to run a 'ceph orch' command (or if 'ceph orch' commands just stop responding), you have a config race condition (or cephadm is just stuck).  It appears the only way to resolve this is to totally disable 'cephadm' and then re-enable it:

 ceph orch set backend ""
 ceph mgr module disable cephadm
 ceph mgr module enable cephadm
 ceph orch set backend cephadm

Not the most elegant, and it doesn't address '''''why''''' cephadm got so messed up, but it works.