Joe Hammerman <jhammerman@xxxxxxxxxxxx> writes:
> If we replaced Sed with Cat, I'm a little confused as to what we would be catting; there's a stream coming in, right?
>
> To your second question - yes, logging is fully functional with sudo
>
> To your final question - no, even with a sed command that performs no actions, no logging information is generated.
>
> -----Original Message-----
> From: news [mailto:news@xxxxxxxxxxxxx] On Behalf Of Dan Poirier
> Sent: Wednesday, January 27, 2010 12:03 PM
> To: users@xxxxxxxxxxxxxxxx
> Subject: Re: mod_log_config issue
>
>> We have an issue with mod_log_config; specifically we are trying to pipe log output through Sed before it goes to Cronolog. The result is that we get no output whatsoever.
>>
>> CustomLog "| /bin/sed s/[0-9]\\\{1,3\\\}\\\.[0-9]\\\{1,3\\\}\\\.[0-9]\\\{1,3\\\}\\\.[0-9]\\\{1,3\\\},\\\ //g | /usr/bin/sudo -u VEsvc /usr/sbin/cronolog --period=1hours /mnt/export/www/logs/beacon/%Y%m%d/%H/survey_log" combined env=survey_log
>>
>> ErrorLog "| /bin/sed s/[0-9]\\\{1,3\\\}\\\.[0-9]\\\{1,3\\\}\\\.[0-9]\\\{1,3\\\}\\\.[0-9]\\\{1,3\\\},\\\ //g | /usr/bin/sudo -u VEsvc /usr/sbin/cronolog --period=1hours /mnt/export/www/logs/beacon/%Y%m%d/%H/error_log"
>>
>> We have also experimented with writing a wrapper script that performs all three of the above functions - the result is the same.
>>
> What's the simplest case that doesn't work? What if you take out the
> whole 'sed' command and just use /bin/cat? Does invoking cronolog with
> sudo work when not receiving input piped from another command? Does it
> work with a simpler sed script?
Okay, then you're saying this gives you logging:
CustomLog "| /usr/bin/sudo -u VEsvc /usr/sbin/cronolog --period=1hours /mnt/export/www/logs/beacon/%Y%m%d/%H/survey_log" combined env=survey_log
but this doesn't:
CustomLog "| /bin/sed | /usr/bin/sudo -u VEsvc /usr/sbin/cronolog --period=1hours /mnt/export/www/logs/beacon/%Y%m%d/%H/survey_log" combined env=survey_log
How about this:
CustomLog "| /bin/cat | /usr/bin/sudo -u VEsvc /usr/sbin/cronolog --period=1hours /mnt/export/www/logs/beacon/%Y%m%d/%H/survey_log" combined env=survey_log
"cat" with no arguments just copies stdin to stdout, so we can tell if sed is the problem, or the piping.
Also, I would think if putting the piped command directly in the log config is the problem, then replacing it with a wrapper script ought to work. I assume your script looked like:
#!/bin/sh
/bin/sed s/[0-9]\\\{1,3\\\}\\\.[0-9]\\\{1,3\\\}\\\.[0-9]\\\{1,3\\\}\\\.[0-9]\\\{1,3\\\},\\\ //g | /usr/bin/sudo -u VEsvc /usr/sbin/cronolog --period=1hours /mnt/export/www/logs/beacon/%Y%m%d/%H/survey_log
(maybe with one level of backslashes removed), was marked executable, and the full path was configured:
CustomLog "| /path/to/wrapper/script" combined env=survey_log
You might try a simpler script:
#!/bin/sh
/bin/cat >>/path/to/logfile
again just to rule out something funny in the sed/sudo/cronolog part as opposed to Apache.
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