Re: Logging to syslog from clients

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2011/8/15 Colin McCabe <cmccabe@xxxxxxxxxxxxxx>:
> 2011/8/15 Székelyi Szabolcs <szekelyi@xxxxxxx>:
>> Hi all,
>>
>> I'm running a Ceph cluster with a number of read-only ramdisk based clients
>> mounting the filesystem. I'd like to get the logs of the client out via syslog.
>> I've seen some posts dealing with logging to syslog, namely the thread
>> starting at http://www.spinics.net/lists/ceph-devel/msg02876.html . I see
>> options like "log to syslog" and "clog to syslog". It's not clear what they
>> mean, could someone tell me the difference?
>
> "clog" is the center logger, which is a separate subsystem from the
> regular logger. The central log is maintained by the monitors rather
> than being a per-daemon thing like the regular log.
>
>>
>> Anyway, currently my logging settings on the client are
>>
>> [global]
>> log file =
>> log dir =
>> log to syslog = true
>> clog to syslog = true
>>
>> But when the filesystem is mounted with the FUSE client, I still get
>>
>> failed to open log file '/var/log/ceph/client.admin.log': error 2: No such file
>> or directory
>>
>> which is surprising. I thought that the above options should have disabled
>> logging to file, but it looks like it still tries to open it. Is this a bug, or
>> me doing something wrong?
>
> This looks like an actual bug :(
> I'm testing out a fix that will allow users to turn off log files for
> daemons again.

This should be fixed in master by
8072bdcaa4445359051fed443be3d702f20807e0

This should fix it for you.

cheers,
Colin


>
> On an unrelated note: when you log to syslog, you may need to turn
> down the logging a little bit. Syslog tends to drop log messages when
> the load gets heavy, and this makes it harder to figure out what is
> going on.
>
> regards,
> Colin
>
>
>
>>
>> Thanks,
>> --
>> cc
>>
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