HAProxy

Configuration samples, tutorials on how to set HAProxy up in different scenarios and articles on HAProxy inner workings

Being one of the best load-balancers out there for Layer 4 and Layer 7 traffic, HAProxy has become one of the piece of software that I like the most when it comes to proxying requests to a set of backends.

As it’s application is pretty extensive, some insights arise once you start dealing it for a long time.

Here is where you can find some knowledge that I gained from it.

If you’re looking for some specific configuration of have a special need that you can’t find a solution for, drop me a message! I’m very into HAProxy and would like to help: I’m @cirowrc on Twitter (or you can just send me an email - see About me).

Using HAProxy maps with Access control lists (acl)
HAProxy frontends can have their logic simplified by using maps. Check out how to tie maps with ACLs to improve routing.
Making HAProxy respond 200 OK to health checks
Sometimes you need HAProxy to have a special frontend to return 200 OK when a request is made for health-checking purposes. Check out three ways of doing it.
Replacing HAProxy ACLs by HAProxy Maps
HAProxy maps can reduce the complexity of haproxy configurations by allowing you to define map lookup logic. Check out how to remove ACLs in favor of maps.
How to install HAProxy with Lua support on MacOS
Setting up HAProxy on Mac is not complicated. Check out how to build it from source and run it locally.
HAProxy Docker Container Logs
HAProxy doesn't naturally log to standard out - you need to pick rsyslog and make it do so. Check out how to have HAProxy logs going to stdout using Docker containers.