CentOS 8 keepalived ロードバランサー構築

dnf install ipvsadm keepalived

cp -a /etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf.bak 2>/dev/null || true

cat <<'EOF' > /etc/keepalived/keepalived.conf
virtual_server 192.168.51.21 80 {
    delay_loop 3
    lb_algo rr
    protocol TCP

    real_server 192.168.52.31 80 {
        weight 1
        inhibit_on_failure
        TCP_CHECK {
            connect_port 80
            connect_timeout 30
            nb_get_retry 3
            delay_before_retry 3
        }
    }

    real_server 192.168.52.32 80 {
        weight 1
        inhibit_on_failure
        TCP_CHECK {
            connect_port 80
            connect_timeout 30
            nb_get_retry 3
            delay_before_retry 3
        }
    }
}
EOF

systemctl enable --now keepalived
systemctl status keepalived
ipvsadm -L -n