haproxy

echo 'global
    log         127.0.0.1 local2
    chroot      /var/lib/haproxy
    pidfile     /var/run/haproxy.pid
    maxconn     4000
    user        haproxy
    group       haproxy
    daemon
    stats socket /var/lib/haproxy/stats

defaults
    mode                    http
    maxconn                 8000
    log                     global
    option                  httplog
    option                  dontlognull
    option http-server-close
    retries                 3
    timeout http-request    20s
    timeout queue           1m
    timeout connect         10s
    timeout client          1m
    timeout server          1m
    timeout http-keep-alive 10s
    timeout check           10s

listen stats
    bind *:8080 interface ens160
    mode http
    stats enable
    stats uri /stats
    stats realm HAProxy\ Statistics
    stats admin if TRUE

listen web-backend
    bind *:80
    balance  roundrobin
    cookie SERVERID insert indirect nocache
    mode  http
    option  httpchk
    option  httpclose
    option  httplog
    option  forwardfor
    server controller01 192.168.10.122:8081 check cookie controller01 inter 5s fastinter 2s rise 3 fall 3
    server controller02 192.168.10.123:8081 check cookie controller02 inter 5s fastinter 2s rise 3 fall 3' > /etc/haproxy/haproxy.cfg