This assumes you have installed HAProxy.

Add the following block to /etc/haproxy/haproxy.cfg.

listen stats
    bind *:8080
    stats enable
    stats uri /stats

Notice this prior block is listening on port 8080.

• If you have a firewall, such as iptables or firewalld, allow port 8080 in the firewall.
• If you are running on Amazon Web Services (AWS), update the Security Group associated with your EC2 instance to allow inbound connections on port 8080

The ps command can be used to determine if your system is using init or systemd. If PID 1 is init, then you will use the service command. If PID 1 is systemd, then you will use the systemctl command.

If your system is using systemd, use the systemctl command to restart HAProxy.

systemctl restart haproxy

If your system is using init, use the service command to restart HAProxy.

service haproxy restart

You should now be able to access the stats page at http://<hostname or ip address>:8080/stats.