I cant seem to find decent documentation that explains this properly or maybe better way to see in what I think is clear. I understand what HAProxy/keepalived and have worked with many different types of load balancers over the years.
What I can't wrap my head around is the implementation of direct routing. To be clear I am intimately familiar with how direct server return (direct routing) works in all load balancers but I am trying to understand how HAProxy/keepalived implement this.
My understanding is that HAProxy does not support this at all and the only option is to use keepalived ipvs. So can anyone please tell me :
1) Am I correct that HAProxy alone does not support direct routing?
2) Why would I need to have both HAProxy and keepalived to have direct routing? It appears that you should only need keepalived for this to work.
Thanks for any pointers..