Ceph

The init.d/ceph script has these lines:

            if [ ! -d $run_dir ]; then
                # assume /var/run exists
                install -d -m0770 -o ceph -g ceph /var/run/ceph
            fi

Which should do the right thing.
However with 10.2.6 (and probably before) under Debian Jessie something else seems to create the directory with root ownership before the startup script even runs.
So the above check finds the directory and never installs it.
Which consequently leads to a failure to start any services.
Removing the check and making the "install" unconditional fixes this.