Yep, that would give you one logfile every day. It will not care about whether it reached 500mb though. But on the plus side that gives you a trivial way to identify which file holds a specific date, which is pretty cumbersome otherwise.

On May 30, 2018 07:52, "Amin, Jitesh CTR DISA JSP (US)" <jitesh.amin.ctr@mail.mil> wrote:
CLASSIFICATION: UNCLASSIFIED
Hello,
So here's what currently is configured in our .conf file:

destination syslog { file("/var/log/syslog.log"  perm(0644)); };

what you are saying, is if I want logs to rotate on daily basis, I can just make the above line to read as following:

destination syslog { file("/var/log/syslog-${YEAR}-${MONTH}-${DAY}.log"); };


Thanks
Jitesh Amin


CLASSIFICATION: UNCLASSIFIED

-----Original Message-----
From: Gergely Nagy <algernon@balabit.com>
Sent: Wednesday, May 30, 2018 7:25 AM
To: Amin, Jitesh CTR DISA JSP (US) <jitesh.amin.ctr@mail.mil>; syslog-ng@lists.balabit.hu
Subject: [Non-DoD Source] Re: [syslog-ng] (U) Rotate syslog-ng log files

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----

Hi!

>>>>> "Amin" == Amin, Jitesh CTR DISA JSP (US) <jitesh.amin.ctr@mail.mil> writes:

    Amin> What we are trying to do is rotate the syslog.log file once it
    Amin> reaches 500 MB (as well as looking into rotating file every 24
    Amin> hours)? Once the log file rotates, it creates a new file named
    Amin> syslog.log.0 and so on..

syslog-ng does not support size-based rotation, you'll have to configure logrotate for that. See the packaging/debian/syslog-ng-core.syslog-ng.logrotate[1] file for an example.

 [1]: Caution-https://github.com/balabit/syslog-ng/blob/master/packaging/debian/syslog-ng-core.syslog-ng.logrotate

With logrotate, the most recent logfile syslog-ng writes to will always be syslog.log, and the rotated files will have different names - depending on the logrotate configuration you use.

For time-based, daily rotation, you can use templates in the destination filename, such as:

destination d_syslog {
  file("/var/log/syslog-${YEAR}-${MONTH}-${DAY}.log");
};

Hope this helps!

--
|8]


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