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Re: Limiting Subversion noise in apache logs

From: Mark Phippard <markphip_at_gmail.com>
Date: Wed, 12 Sep 2012 13:29:14 -0400

I have not tried it, but couldn't you do this easier by using the Apache
piped logs feature? Just send the log entries via a pipe to a script that
filters out any entries you do not want in the log. I am not positive, but
your script might even be able to write the entries you filter into a
different file.

Example: http://www.sudleyplace.com/pipederrorlogs.html

On Tue, Sep 11, 2012 at 5:45 PM, <kmradke_at_rockwellcollins.com> wrote:

> I've always been slightly annoyed with Apache 401 "unauthorized" log
> entries
> when accessing a Subversion repository. I realize these are part of the
> standard authentication "handshake" via the http protocol.
> (Always ask anonymously first...)
> I also realize that mod_dav_svn can now provide a custom log file, but I
> like
> my apache logs. On a busy server, these can get to be tens of gigabytes
> per
> day. I'm not aware of a way to limit log entries based upon return status
> codes...
> As a test, I think I have been able to abuse the rewrite_module to get rid
> of these apache 401 log entries and I was wondering if any
> Apache/Subversion
> gurus could poke holes in why this either doesn't work or shouldn't be
> used:
> <IfModule rewrite_module>
> # Do not log authentication required responses
> RewriteEngine On
> RewriteCond %{LA-U:REMOTE_USER} =""
> RewriteCond %{REQUEST_URI} !-U
> RewriteRule .* - [Last, ENV=dontlog:1]
> </IfModule>
> <IfModule log_config_module>
> LogFormat "%h %l %u %t \"%r\" %>s %b" common
> CustomLog "logs/access.log" common env=!dontlog
> </IfModule>
> I'm aware the sub-request for the last RewriteCond line is expensive. I'm
> hopeful the other RewriteCond lines would short circuit most of the server
> accesses. Does Subversion create any connections with something
> other than an initial OPTIONS request? I only trivially tested neon. I
> added
> that condition as a hopeful performance improvement.
> And yes, as I stated above, I realize Subversion can create it's own
> custom log, but using that removes the fun in this experiment...
> Kevin R.

Mark Phippard
Received on 2012-09-12 19:29:48 CEST

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