[Bro] Append instead of overwrite
jlay at slave-tothe-box.net
Thu Aug 21 14:13:25 PDT 2014
On 2014-08-21 13:36, Daniel Thayer wrote:
> On 08/15/2014 01:13 PM, Seth Hall wrote:
>> On Aug 15, 2014, at 11:53 AM, James Lay <jlay at slave-tothe-box.net>
>>> To give me an option to append instead of overwrite. I imagine
>>> since broctl does all the file management that this could be a
>>> line option...
>> Ah! You just want to have file management (and perhaps full
>> rotation?) added as a standalone script and not something that is
>> added by broctl?
>> Johanna is right that with our current logging scheme we can't
>> really append log files for multiple reasons but I could certainly
>> pull together something that would give you decent log rotation
>> without running broctl.
> To get basic log rotation working without running broctl, you only
> need to add this in one of your Bro scripts:
> redef Log::default_rotation_interval = 3600 secs;
> However, that does not compress the rotated logs, and it will not
> move them to another directory. If you want those features, then
> you need to have broctl installed, and you need to add this line
> redef Log::default_rotation_postprocessor_cmd = "archive-log";
> The "archive-log" script will be executed by Bro (so it either needs
> to be in Bro's PATH or you need to give the pathname).
> In order to get the archive-log script to work, you need to
> edit broctl.cfg as needed and run "broctl install". Then start Bro
> manually and when Bro runs archive-log it should have all the
> info it needs.
Yea so I lied I tested this already :D This works really well. I'm
assuming that the number of seconds in "redef 3600 secs" and
"LogRotationInterval = 3600" in broctl.conf have to match up. And as I
have bro symlinked to /usr/local/bin/bro I also had to symlink:
lrwxrwxrwx 1 root root 47 Aug 21 14:24 /usr/local/bin/archive-log
lrwxrwxrwx 1 root root 52 Aug 21 14:38
But after that it ran like a champ. My last question is if I have
these rotate every 24 hours, if I say...start this at 15:00, will it
rotate at 15:00? Thank you.
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