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IMAP / SMTP / FTP load balancing

server1 <---- replication ---- > server2

using LBaaS v2 on top of these instances. How would one setup the correct configuration to allow imap(s) traffic flow throw the load balancer and failover to server2 if server1 is down?

what kind of healthmonitor do I need to setup? At the moment, when server1 goes down traffic is never flown to server2 on the imap port.

I've setup port 80 and port 443 correctly, failover works as it should.

  1. Is this possible at all?
  2. if not, how would I need to setup failover in openstack?