Ceph

ceph-osd is difficult to debug in operation when running under systemd or docker, or any other system that expects to see error logs appear via STDOUT+STDERR, because ceph_osd.cc explicitly closes STDERR with a call to global_init_shutdown_stderr, without checking of the -f (foreground) or -d (debug) options are in use. With -d, this leads to all error messages being silently discarded with no logs at all, which is the precise opposite of what -d is supposed to do.

Code in either ceph_osd.cc or global_init.cc should check for foreground operation before closing STDERR.