In case if teleport is deployed on AWS in IOT mode or Trusted clusters are being used, one can observe the following repeated logs:
Connected to <host>:443 target:example.com:443 reversetunnel/agent.go:343 INFO [PROXY:AGE] Outbound tunnel stats. stats:map[connecting:0 discovering:1 connected:1 discovered:0 disconnected:0] target:memory cluster:memory reversetunnel/agentpool.go:432
discovering section here. It means that agent constantly tries to connect (discover) both proxies behind the load balancer. Debug logs will show the following picture:
DEBU [PROXY:AGE] Missed, connected to [ip-1-us-west-2-compute-internal.memory 1-us-west-2-compute-internal example.com] instead of ip-2-us-west-2-compute-internal. target:example.com:443 reversetunnel/agent.go:364 DEBU [PROXY:AGE] Changing state discovering -> disconnected. target:example.com:443 reversetunnel/agent.go:202
The following is fixed by turning on cross zone load balancing on the load balancer settings.