Ceph » RADOS

Hi,

In my ceph.conf I have the option:

cluster network = 10.0.0.0/24

But the host has no IP address in the network 10.0.0.0/24. This is why my OSD doesn't start:

[root@xceph-nd-2 ~]# /usr/bin/ceph-osd -d --debug_osd 10 --cluster ceph --id 4 --setuser ceph --setgroup ceph
2018-06-22 01:55:14.535 7f28914be1c0  0 set uid:gid to 167:167 (ceph:ceph)
2018-06-22 01:55:14.535 7f28914be1c0  0 ceph version 13.2.0 (79a10589f1f80dfe21e8f9794365ed98143071c4) mimic (stable), process (unknown), pid 21853
2018-06-22 01:55:14.535 7f28914be1c0  0 pidfile_write: ignore empty --pid-file
2018-06-22 01:55:14.572 7f28914be1c0  5 object store type is bluestore

# Above, the exit code is 1 and the osd doesn't start. But there is no relevent error message.

[root@xceph-nd-2 ~]# strace -e trace='!all' /usr/bin/ceph-osd -d --debug_osd 10 --cluster ceph --id 4 --setuser ceph --setgroup ceph
2018-06-22 01:55:24.610 7effcc0b61c0  0 set uid:gid to 167:167 (ceph:ceph)
2018-06-22 01:55:24.610 7effcc0b61c0  0 ceph version 13.2.0 (79a10589f1f80dfe21e8f9794365ed98143071c4) mimic (stable), process (unknown), pid 21866
2018-06-22 01:55:24.611 7effcc0b61c0  0 pidfile_write: ignore empty --pid-file
2018-06-22 01:55:24.659 7effcc0b61c0  5 object store type is bluestore
2018-06-22 01:55:24.662 7effcc0b61c0 -1 unable to find any IP address in networks '10.0.0.0/24' interfaces ''

1. Why the only relevant error message:

unable to find any IP address in networks '10.0.0.0/24' interfaces ''

is displayed only via strace?

2. Is -1 a log level? I thought the log level was N/M where N and M are positive integers.

Regards.