Load balancing in front of Proxy - App

[DonPook]

Hello,

We basically want to create High Availability. Unfortunately, Pacemaker / Corosync are restricted in our customer's deployment.
What if we use a Load balancer in front of 2 Proxy servers and in front of Application server (not for balancing, but for HA, link up - down) and make all agents active (so traffic goes from agents to proxy, hence use the "up" link)?
Would that be an issue between proxies and app servers, or they can also work as an "agent to proxy" connection (proxy initiating the connection back to app)?
Based on your experience, would I be missing something using only active checks?
Any issues you guys see in this implementation?


Thanks in advance

[DonPook]

I've found /tried most of questions above. One question, what happens if one proxy reports an agent up and another proxy reports it down? Because when I put this on paper, I figured that, when traffic leave a proxy to go to the other one, this proxy will report unavailability for the agents (since they will not talk to the proxy anymore) correct?

Thanks in advance