I am working on a implementation which requires using websockets with failover to comet. Web socket is an upgrade protocol to HTTP, and once established the connection remains open between server and client. Typical HTPP load balancers will not work – so what is the solution.
I did some research on loadbalancer with specific support for Websockets –it turns out that HAPROX is the most reliable and widely used open source option. Other option is NgNix, having community version as well as paid model –but community version lacks active support.
Apache has also released it’s module for websockets, but reviews are not as good as HAPROXY. A good comparison and discussion around these three is available in this post.
The “Greatest Limitation” of HAPROXY –it does not have a build for windows.
It can be worked out for testing with cygwin on windows -but for any production deployment, it has to be a linux machine.