Lallassu/varnish-visualizer

Varnish hit/pass visualisation in WebGL.

Varnish Visualizer 3D

Visualize cache hits/misses in a Varnish cache. It uses VCL and two VMODs to do this.

Required VMODs (if not using the varnishncsa version):

• RabbitMQ: https://github.com/Lallassu/libvmod-rmq.git
• GeoIP(with lat/long support): https://github.com/Lallassu/libvmod-geoip.git

Developed for Varnish 5.2.x and not for production!

Required a default installation of RabbitMQ and Varnish. The queue for RabbitMQ has been configured with a TTL of 3 seconds.

It uses a nodejs server as a backend that sends out data to clients using socket.io. To run the server: nodejs server.js

Demo

Using this on my http://webgl.nu site and it can be seen by opening up your browser on: http://varnish.webgl.nu and then go to http://webgl.nu too see traffic if no one else is currently surfing the site.

VCL Used for varnishncsa

vcl 4.0;

backend default {
    .host = "127.0.0.1";
    .port = "8888";
}

sub vcl_recv {
	unset req.http.x-cache;
	unset req.http.Cookie;
}

sub vcl_hit {
	set req.http.x-cache = client.ip+" hit";
}

sub vcl_miss {
	set req.http.x-cache = client.ip+" miss";
}

VCL For RabbitMQ VMOD

vcl 4.0;
import geoip;
import rmq;

backend default {
    .host = "127.0.0.1";
    .port = "8888";
}

sub vcl_init {
        rmq.init("localhost", 5672, "test", "guest", "guest");
}

sub vcl_recv {
	unset req.http.Cookie;
}

sub vcl_hit {
	rmq.send(client.ip, geoip.country_name(client.ip), geoip.latlong(client.ip), "hit");
}

sub vcl_pass {
	rmq.send(client.ip, geoip.country_name(client.ip), geoip.latlong(client.ip), "miss");
}

Screenshot

License

MIT