title: HAProxy health check
body: <p>My current setup has 2 HAProxies configured with keepalived for High Availability, the 2 proxies serve as a Reverse Proxy and Load Balancer for virtual webservices. I know that HAProxy can check the health of its backend (I've already configured this) but my question is something else. </p>
  
  <p>At my company there's a F5 Big-IP Load Balancer which serves as the first line of defense, it will redirect requests to my HAProxies when needed.</p>
  
  <p>I need to know if there is a way to let my F5 Big-IP check the health of the HAProxies frontend, so when the proxies are booting no requests will be lost.</p>
  
  <p>Thanks</p>