Varnish & Heartbeat as loadbalancers

heartbeathigh-availabilityload balancingvarnish

Here is the set up I am trying to accomplish

This is the setup

So, what I'm trying to accomplish is: a user goes to 10.0.0.1 it passes it to whichever loadbalancer is managing the requests. I then want varnish actually to handle the request.

Here is my ha.cf file:

debug                           3
debugfile                       /var/log/ha-debug
logfile                         /var/log/ha-log
bcast                           eth0
keepalive                       2
warntime                        5
deadtime                        15
initdead                        30
udpport                         694
udp                             eth0
auto_failback                   yes
node                            loadb1
node                            loadb2

*This is the same on loadb2. Also I have the debugging enable for testing purposes. It will be removed when its production ready.

Here is haresources

loadb1 IPaddr::10.0.11.200/32 varnishd

*Again, same on loadb2 (I have also tried to make it so that heartbeat doesn't manage anything other than the IP; so no "varnishd" at the end in the haresources)

My varnish config is as follows:

 backend server1 {
.host = "10.5.0.111";
.probe = {
.url = "/";
.interval = 5s;
.timeout = 1 s;
.window = 5;
.threshold = 3;
}
}
backend server2 {
.host = "10.5.0.112";
.probe = {
.url = "/";
.interval = 5s;
.timeout = 1 s;
.window = 5;
.threshold = 3;
}
}

director example_director random {
{
.backend = server1;
.weight = 2;
}
{
.backend = server2;
.weight = 1;
}
}

sub vcl_recv {
if (req.http.host ~ "^(www.)?bps101.net$") {
set req.backend = example_director;
}
}

I have my heartbeat working fine. The ip 10.0.0.1 is fully pingable. But when I got to 10.0.0.1 in a browser I get a connection reset. (nothing is listening on port 80). I know the varnish config works. I know the heartbeat config works. I just cannot get them to work together. Does anyone have any suggestions or ideas? I would greatly appreciate any advice, direction, etc that anyone can provide. Thanks.

Best Answer

You can make your own script under resources.d so that heartbeat can manage the varnish deamon.

A simple solution would be

#!/bin/bash


case $1 in

    start)

        /etc/init.d/varnish start
    ;;

    stop)

        /etc/init.d/varnish stop
    ;;

    status)

    ;;

esac

You can find a small manual in german language under http://foobar.lamp-solutions.de/howtos/lamp-administration/tuning/tuning-einzelansicht/archive/2011/may/article/hoechverfuegbarer-http-loadbalancer-mit-varnish-und-heartbeat-unter-ubuntu-1004.html

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