[syslog-ng] syslog-ng 3.1.1 "cuts" of the first charater of the Apache error log when forwarding

[filip.nollet at bayercropscience.com]

Hi again


First of all, I already used syslog-ng before, but I had no idea it was 
doing parsing, so this is normal :p

I changed my configuration to use the no_parse function in the source 
driver of the webserver on which the syslog-ng client
forwards the messages to the syslog server. This does the trick. 

I don't even have to change the configuration on the target syslog server 
which greatly reduces configuration file changes.


Thx for the answer!


Filip




> Hi,
> 
> > I have a weird problem with syslog-ng. I am setting up a syslog-ng
> client on an Apache server which forward both access and error log 
> to a central syslog-ng server.
> 
> First of all please note that you're trying to deal with
> non-standard-compliant messages. syslog-ng tries to parse the incoming
> log lines trying various known syslog formats.
> 
> > The access log on the source has entries like this:
> > 10.3.154.20 - - [23/Apr/2010:13:55:25 +0200] "GET /images/userLo...
> > and this becomes like this on the syslog server:
> > servername 10.3.154.20: - - [23/Apr/2010:13:55:25 +0200] "GET 
/images/use
> 
> The first syslog-ng (which receives the apache log) parses the line.
> There is no syslog header found so it falls back to the legacy format.
> There is neither priority code nor timestamp so the IP address becomes
> the program name. That's why you see it logger on the second server.
> 
> > All ok with this one, but with the error log I get this on the 
webserver:
> > [Fri Apr 23 13:55:25 2010] [error] [client 10.3.154.20] File doe...
> > but this on the syslog server:
> > servername Apr 23 13:55:25 2010] [error] [client 10.3.154.20] File 
do...
> >
> > Where is the [ character at the beginning of the timestamp gone?????
> 
> As above, this line isn't a syslog message at all. From syslog's
> perspective it's more or less random junk. The trailing '[' causes
> that there is no program name at all and the parser thinks the
> following string up to the closing ']' is the pid like in normal logs
> eg. programname[pid]
> 
> I don't see how could this "pid" appear on the receiving side with
> only the closing brace. Please show your configs and the captured
> network packet too.
> 
> In general when an app doesn't speak syslog formats and there is no
> option to format its logs properly then using the no-parse option (on
> all syslog-ng servers the log passes through) or writing a small app
> which reformats the logs and feeds to syslog-ng is the way to go.
> 
> Regards,
> 
> Sandor
> 





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