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load-balancinghaproxyhigh-availabilitykeep-alive

Advantage of using HAProxy AND Keepalived vs just Keepalived

As per the (verbose) topic, are there any advantages over using a Keepalived & HAProxy as an HA webserver loadbalancer vs a pure keepalived solution?

Solution

  • Keepalived is working in layer 4 so doesn't have layer 7 knowledge at all. By using HAProxy and Keepalived together you can get benefit of having some options that HAProxy provides in layer 7 like Stickiness, Sampling and converting information, ACLs and conditions, Content switching, Stick-tables, Formated strings, HTTP rewriting and redirection, Server protection, etc.

    If you only need to have a load balancer without any manipulating or any high level decision (layer 7) you can use only Keepalived and it will be faster because it works in layer 4.