haproxy.cfg

global
  ulimit-n 99999
  maxconn 99999
  maxpipes 99999
  tune.maxaccept 500
  log 127.0.0.1 local0
  log 127.0.0.1 local1 notice
  chroot /var/lib/haproxy
  user haproxy
  group haproxy

defaults
  log global
  mode http
  option dontlognull
  timeout connect 5000ms
  timeout client 50000ms
  timeout server 50000ms
  errorfile 400 /etc/haproxy/errors/400.http
  errorfile 403 /etc/haproxy/errors/403.http
  errorfile 408 /etc/haproxy/errors/408.http
  errorfile 500 /etc/haproxy/errors/500.http
  errorfile 502 /etc/haproxy/errors/502.http
  errorfile 503 /etc/haproxy/errors/503.http
  errorfile 504 /etc/haproxy/errors/504.http

listen stats :80
  stats enable
  stats uri / # must be present to see the logs
  stats auth admin:admin

listen mqtt
  bind *:1883
  bind *:8883 ssl crt /certs/lelylan-mqtt.pem
  mode tcp
  #Use this to avoid the connection loss when client subscribed for a topic and its idle for sometime
  option clitcpka # For TCP keep-alive
  timeout client 3h #By default TCP keep-alive interval is 2hours in OS kernal, 'cat /proc/sys/net/ipv4/tcp_keepalive_time'
  timeout server 3h #By default TCP keep-alive interval is 2hours in OS kernal
  option tcplog
  balance leastconn
  server mosca_1 178.62.122.204:1883 check
  server mosca_2 178.62.104.172:1883 check