Laravel loadbalancer + redis caching

I have a loadbalancer, 3 servers for application and one database.

I want to use the redis external server for caching and session in laravel, so I made a small test and had some problem.

What do I need to run with HAproxy? disable sticky session? what other configs do I need?

Another thing about caching is that cleavr does not support enabling OPcache for php, laravel forge does that and it is realy easy to enable.