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user31462
Asked: 2010-02-09 07:04:34 +0800 CST

Syslog-ng: how to log severity/facility?

  • 772

Here is the system:

  • SUSE Linux Enterprise Server 10
  • syslog-ng with predefined syslog-ng.conf
  • messages in /var/log/messages look like:

Feb 8 09:29:53 sles1 sshd[17529]: Accepted keyboard-interactive/pam for root from 10.30.34.64 port 4855 ssh2

What I need:

  • to log event severity/facility. For instance, add <PRI> at the beginning of the message:

<15> Feb 8 09:29:53 sles1 sshd[17529]: Accepted keyboard-interactive/pam for root from 10.30.34.64 port 4855 ssh2

My question is:

How to change syslog-ng.conf to enable this kind of logging?

Thanks.

sles sles10 syslog-ng

3 Answers

  1. Best Answer

    It sounds like you want to rewrite your logfiles in a specific format. The link has the details on how to tell syslog-ng to do that :)

    • 5

  2. Based on some quick reading I think you want to use the syslog() driver, which si described in section 8.1.6 of the Syslog-ng Administrator's guide. http://www.balabit.com/support/documentation/?product=syslog-ng

    I hope this helps, if I find anything more, I'll let you know.

    I think the syslog() driver is meant to be used with the source declaration. so where I have
    source external { udp(); };

    You might use
    source external { syslog(transport("udp")); };

    I don't have a suitable testing environment to try this out on, but I think this is what you want to do, if I understand your question correctly.

    I went back and looked and it turns out there's a macro you can use in your destination called TAG.

    e.g.
    destination d_all { file("/log/$FACILITY.log" group("users") template_escape(no) template("$TAG $PRIORITY $S_DATE $HOST $MSG\n")); };
    These macros are defined around page 218 of the admin guide.

    • 2

  3. If you have a destination configured as so:

    destination syslog-consumer { unix-stream("/var/run/syslog-output"); };

    syslog messages headed to syslog-consumer get sent to that socket in the format you want.

    You'll just need to setup something to listen to that socket and write to a file.

    • 1