Conditional Logging ( using varnishncsa )

[Maninder Singh]

Thank you Dridi.

This worked :-)

On Thu, 7 Nov 2019 at 12:31, Dridi Boukelmoune <dridi at varni.sh> wrote:

> On Thu, Nov 7, 2019 at 6:34 AM Maninder Singh <mandys at gmail.com> wrote:
> >
> > Hi,
> >
> > We have logging turned on using varnishncsa.
> >
> > /usr/bin/varnishncsa -a -w /var/log/varnish/varnishncsa.log -D -f
> /etc/sysconfig/varnishncsa
> >
> > Here is what's defined in varnishncsa
> >
> > %{X-Forwarded-For}i %l %u %t %D \"%r\" %s %b \"%{Referer}i\"
> \"%{User-agent}i\" \"%{Host}i\" %{Varnish:hitmiss}x
> >
> > However, this would log EVERY request that goes through varnish.
> >
> > We have a monitoring server that hits it aggressively ( and also static
> files ).
> >
> > x.x.x.x - - [07/Nov/2019:00:22:53 -0600] 2080 "GET
> http://localhost/index.php HTTP/1.0" 200 8 "-" "HTTP-Monitor/1.1" "-" miss
> > x.x.x.x - - [07/Nov/2019:00:22:58 -0600] 2472 "GET
> http://localhost/index.php HTTP/1.0" 200 8 "-" "HTTP-Monitor/1.1" "-" miss
> > x.x.x.x - - [07/Nov/2019:00:22:59 -0600] 1919 "GET
> http://localhost/index.php HTTP/1.0" 200 8 "-" "HTTP-Monitor/1.1" "-" miss
> >
> > Is there a way in which I can exclude these from varnish logs ?
> >
> > In apache I would just do
> >
> >  SetEnvIf Request_URI
> "\.(jpeg|jpg|xml|png|gif|ico|js|css|swf|woff|ttf|eot\?|js?.|css?.)$" DontLog
> >  SetEnvIfNoCase User-Agent "(HTTP-Monitor)" DontLog
> >  CustomLog /var/www/logs/access_80_log combined env=!DontLog
> >
> > This would otherwise just keep filling up the logs.
>
> Do something like this with your command line:
>
> > varnishncsa [...] -q 'not (ReqHeader:User-Agent ~ "HTTP-Monitor" or
> ReqURL ~
> "\.(jpeg|jpg|xml|png|gif|ico|js|css|swf|woff|ttf|eot\?|js?.|css?.)$")'
>
> See man varnishncsa, man vsl and man vsl-query.
>
> Dridi
>
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