Re: [syslog-ng] log smtp mail messages to a specific file

1 Jun 2010

      Ya, thats fine. The only change I'd make is instead of

log { source(src); filter(notmail); destination(messages); };
log { source(src); filter(notmail); destination(console_all); };

do

log { source(src); filter(notmail); destination(messages); destination(console_all); };

That way it doesnt have to apply the filter three times, only twice. You 
could optimize it even further with the fallback flag, but unless you've 
got a really high volume of messages, you could probably just leave it 
as is.

Sent: Tuesday, June 01, 2010 1:10:24 PM
From: Thanasis <thanasis@asyr.hopto.org>
To: syslog-ng@lists.balabit.hu
Subject: [syslog-ng] log smtp mail messages to a specific file
...
Postfix messages were logged in /var/log/messages.
Here is how syslog-ng.conf was (before my changes):
----------------------------------------------------
# cat /etc/syslog-ng/syslog-ng.conf.orig
@version: 3.0
# $Header:
/var/cvsroot/gentoo-x86/app-admin/syslog-ng/files/syslog-ng.conf.gentoo.3,v
1.1 2010/04/06 02:11:35 mr_bones_ Exp $
#
# Syslog-ng default configuration file for Gentoo Linux
options {
    chain_hostnames(no);
# The default action of syslog-ng is to log a STATS line
    # to the file every 10 minutes.  That's pretty ugly after a while.
    # Change it to every 12 hours so you get a nice daily update of
    # how many messages syslog-ng missed (0).
    stats_freq(43200);
};
source src {
    unix-stream("/dev/log" max-connections(256));
    internal();
    file("/proc/kmsg");
};
destination messages { file("/var/log/messages"); };
# By default messages are logged to tty12...
destination console_all { file("/dev/tty12"); };
# ...if you intend to use /dev/console for programs like xconsole
# you can comment out the destination line above that references /dev/tty12
# and uncomment the line below.
#destination console_all { file("/dev/console"); };
log { source(src); destination(messages); };
log { source(src); destination(console_all); };
-------------------------------------------------
I wanted to log postfix messages to a new file: /var/log/mail.log
I changed /etc/syslog-ng/syslog-ng.conf like so:
# diff syslog-ng.conf.orig syslog-ng.conf
15a16,23
...
filter mail {
    facility(mail);
};
filter notmail {
    not facility(mail);
};
22a31
...
destination mail { file("/var/log/mail.log"); };
31,32c40,42
< log { source(src); destination(messages); };
< log { source(src); destination(console_all); };
---
...
log { source(src); filter(mail); destination(mail); };
log { source(src); filter(notmail); destination(messages); };
log { source(src); filter(notmail); destination(console_all); };
----------------------------------------------------------------------
It worked, or at least I think so, by looking at both /var/log/messages
and /var/log/mail.log.
So ,my questions are:
1) Are my edits OK? Did I do anything wrong?
2) Should I have configured it otherwise, perhaps more efficiently?
Thanks.
Thanasis
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Re: [syslog-ng] log smtp mail messages to a specific file

Patrick H.