Saya menggunakan HAProxy 1.4.18 dengan konfigurasi backend berikut backend staging option httpchk HEAD /check.txt HTTP/1.0 http-check disable-on-404 default-server error-limit 1 on-error mark-down server staging01 x.x.x.x:80 check observe layer7 server staging02 x.x.x.x:80 check observe...