Install HAProxy on AlmaLinux 9

Step 1 – Install

dnf install -y haproxy
systemctl enable --now haproxy

Step 2 – Basic /etc/haproxy/haproxy.cfg

global
    log /dev/log local0
    chroot /var/lib/haproxy
    stats socket /run/haproxy/admin.sock mode 660 level admin
    user haproxy
    group haproxy
    daemon

defaults
    log    global
    mode   http
    option httplog
    timeout connect 5s
    timeout client  50s
    timeout server  50s

frontend http-in
    bind *:80
    default_backend webservers

backend webservers
    balance roundrobin
    option  httpchk GET /health
    server web1 192.168.1.10:80 check
    server web2 192.168.1.11:80 check
    server web3 192.168.1.12:80 check

listen stats
    bind *:8404
    stats enable
    stats uri /
    stats refresh 10s
    stats auth admin:haproxypass

Step 3 – Validate and reload

haproxy -c -f /etc/haproxy/haproxy.cfg
systemctl reload haproxy 2>/dev/null || rcctl reload haproxy 2>/dev/null || rc-service haproxy reload