Linux - NetworkingThis forum is for any issue related to networks or networking.
Routing, network cards, OSI, etc. Anything is fair game.
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I was able to implement LVS with Direct Routing (iptables).
I am facing a problem while using the iptables which requires
iptables enrty on Real servers like this (iptables –t nat –A PREROUTING –p tcp –d <VIP> --dport <port> -j REDIRECT).
Below is a brief on the setup:
I have 3 servers Apache installed on all three servers (Port 80).
Server 1 (10.50.57.22) -> 10.50.57.55 (VIP) -> running “Pulse”
Server 2 (10.50.57.40)
Server 3 (10.50.57.48)
I have configured LVS on port 80. Added the below iptables entry on 10.50.57.40 & 10.50.57.48
iptables –t nat –A PREROUTING –p tcp –d 10.50.57.55 --dport 80 -j REDIRECT
With the above setup everything works fine. Even Apache on Server 1 (Which has the VIP) get the request as part of Load sharing.
But if I add the iptables entry in Server 1 (10.50.57.22), Requests are received only on the Apache installed this host.
The reason for doing this is to implement redundancy. Like in my case I have implemented the redundant setup on Server 2 (10.50.57.40) and once the “pulse” is stopped on Server 1(10.50.57.22), “pulse” is automatically started on Server 2 (10.50.57.40) which acquired the VIP (10.50.57.55). But since iptables is already active with the above entry all the requests are going to the Apache of same host (10.50.57.40).