simple tcp example (only the frontend and backend sections are meaningful)

haproxy.cfg

global
    log         127.0.0.1 local2

    chroot      /var/lib/haproxy
    pidfile     /var/run/haproxy.pid
    maxconn     4000
    user        haproxy
    group       haproxy
    daemon

    # turn on stats unix socket
    stats socket /var/lib/haproxy/stats

    # utilize system-wide crypto-policies
    ssl-default-bind-ciphers PROFILE=SYSTEM
    ssl-default-server-ciphers PROFILE=SYSTEM

defaults
    mode                    tcp
    log                     global
    option                  httplog
    option                  dontlognull
    option http-server-close
    option forwardfor       except 127.0.0.0/8
    option                  redispatch
    retries                 3
    timeout http-request    10s
    timeout queue           1m
    timeout connect         10s
    timeout client          1m
    timeout server          1m
    timeout http-keep-alive 10s
    timeout check           10s
    maxconn                 3000

frontend main_80
    bind localhost:80

    default_backend             minikube_80

frontend main_443
    bind localhost:443

    default_backend		minikube_443

backend minikube_80
    option tcp-check
    balance     roundrobin
    server app1 minikube:80 check

backend minikube_443
    option tcp-check
    balance     roundrobin
    server app1 minikube:443 check