From mboxrd@z Thu Jan  1 00:00:00 1970
From: Wido den Hollander <wido@42on.com>
Subject: Re: how to debug librados/librbd in logfile
Date: Thu, 28 Jan 2016 15:41:18 +0100
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To: huang jun <hjwsm1989@gmail.com>, ceph-devel <ceph-devel@vger.kernel.org>



On 28-01-16 15:33, huang jun wrote:
> hi,all
> I want to get debug log when using librados/librbd,
> set client section in ceph.conf:
> [client]
> debug_rbd = 20
> debug_objecter = 20
> log_file = /var/log/ceph/ceph.rbd.log
> 
> that not work, file "/var/log/ceph/ceph.rbd.log" does not exist at all.
> Any ideas?
> 

Does the user under which you run the client have access to /var/log/ceph?

You might want to try /tmp for a test.

Wido