...
> sudo hostnamectl
Update Yum
> yum update
Disable firewall
> systemctl disable firewalld
> systemctl stop firewalld
> systemctl status firewalld
Install haproxy
> yum install haproxy
...
...
> sudo hostnamectl
> yum update
> systemctl disable firewalld
> systemctl stop firewalld
> systemctl status firewalld
> yum install haproxy
...