varnish + libvmod-geoip

[hydrapolic]

varnish (https://www.varnish-cache.org/)
Varnish is a web application accelerator. You install it in front of your web application and it will speed it up significantly.

libvmod-geoip (https://github.com/lampeh/libvmod-geoip)
This Varnish module exports functions to look up GeoIP country codes in VCL.

Sometimes, you need to serve different content to people from different countries. Varnish has no built-in functionality to add the country header when sending requests to the backends. Luckily, we can use some of the vmods that link varnish with geoip.

1) get libvmod-geoip ebuild
https://github.com/hydrapolic/gentoo/tree/master/www-servers/libvmod-geoip

2) emerge libvmod-geoip

3) edit /etc/varnish/default.vcl

import geoip;

backend default {
.host = "backend.example.com";
.port = "80";
}

sub vcl_recv {
set req.http.X-Country-Code = geoip.client_country_code();
}

From now on, the backend will have the header X-Country-Code set to the country from which the request came from.

[vguardiola]

HI, I just finish complie the lib but when I tty to restart varnisd and I get this error:

[hydrapolic]

The ebuild is made for Varnish 3.0.5, is that the version of Varnish which you have installed? (VARNISH_VERSION="3.0.5")