This is my haproxy.cfg load balance server running at https://munetaka.me

global
	log /dev/log	local0
	log /dev/log	local1 notice
	chroot /var/lib/haproxy
	stats socket /run/haproxy/admin.sock mode 660 level admin
	stats timeout 30s
	user haproxy
	group haproxy
	daemon

	# Default SSL material locations
	ca-base /etc/ssl/certs
	crt-base /etc/ssl/private

	# See: https://ssl-config.mozilla.org/#server=haproxy&server-version=2.0.3&config=intermediate
        ssl-default-bind-ciphers ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384
        ssl-default-bind-ciphersuites TLS_AES_128_GCM_SHA256:TLS_AES_256_GCM_SHA384:TLS_CHACHA20_POLY1305_SHA256
        ssl-default-bind-options ssl-min-ver TLSv1.2 no-tls-tickets

defaults
	log	global
	mode	http
	option	httplog
	option	dontlognull
        timeout connect 5000
        timeout client  50000
        timeout server  50000
	errorfile 400 /etc/haproxy/errors/400.http
	errorfile 403 /etc/haproxy/errors/403.http
	errorfile 408 /etc/haproxy/errors/408.http
	errorfile 500 /etc/haproxy/errors/500.http
	errorfile 502 /etc/haproxy/errors/502.http
	errorfile 503 /etc/haproxy/errors/503.http
	errorfile 504 /etc/haproxy/errors/504.http

frontend http_80_front
    # bind *:443 ssl crt /etc/letsencrypt/live/munetaka.me/fullchain.pem key /etc/letsencrypt/live/munetaka.me/privkey.pem
    bind *:443 ssl crt /etc/letsencrypt/live/munetaka.me/haproxy.pem
    default_backend http_8088_back

backend http_8088_back
    server nginx_server 127.0.0.1:8088 ssl verify none

# 2024-06-05 add nextCLoud 
frontend front__nextCloud_45101
    bind *:45101 ssl crt /etc/letsencrypt/live/munetaka.me/haproxy.pem
    http-request set-header X-Forwarded-Proto https
    default_backend back_nextCloud_45101

backend  back_nextCloud_45101
    server nextcloud_server hc4Noble.yushei.net:45101

# Caddy Server
frontend front_caddy_h2jammy_43889
    bind *:43889 ssl crt /etc/letsencrypt/live/munetaka.me/haproxy.pem
    default_backend back_caddy_h2jammy_43889

backend back_caddy_h2jammy_43889
    # mode http
    # option http-server-close
    server h2jammy_server h2Jammy.yushei.net:43889 ssl verify none
    # server h2jammy_server h2Jammy.yushei.net:43889


# YsMeeting Service
frontend front_ysmeeting_43410
    bind *:43410 ssl crt /etc/letsencrypt/live/munetaka.me/haproxy.pem
    default_backend back_ysmeeting_43410

backend back_ysmeeting_43410
    # server ysmeeting_server h2nas03.yushei.com.tw:43410 ssl verify none
    # will cause 503 error
    server ysmeeting_server h2nas03.yushei.com.tw:43410Filter files by name
//HAProxy/ubuntuLinux/
Name
Last Modified

The followings are the backend serves and all are running http only.

1. https://munetaka.me

   backend server is nginx

   backend http_8088_back
   server nginx_server 127.0.0.1:8088 ssl verify none
   

2. https://munetaka.me:45101

   backend server is nextCloud

   backend  back_nextCloud_45101
   server nextcloud_server hc4Noble.yushei.net:45101
   

3. https://munetaka.me:43889

   backend server is Caddy server

   backend back_caddy_h2jammy_43889
   # mode http
   # option http-server-close
   server h2jammy_server h2Jammy.yushei.net:43889 ssl verify none
   # server h2jammy_server h2Jammy.yushei.net:43889
   

4. https://munetaka.me:43410

   backend server is mdbook

   backend back_ysmeeting_43410
   # server ysmeeting_server h2nas03.yushei.com.tw:43410 ssl verify none
   # will cause 503 error
   server ysmeeting_server h2nas03.yushei.com.tw:43410
   

All the above backend servers are running http,

[ALERT] (11433) : config : parsing [/etc/haproxy/haproxy.cfg:48] : 'default_backend' cannot handle unexpected argument 'ssl'. [ALERT] (11433) : config : parsing [/etc/haproxy/haproxy.cfg:61] : 'listen' or 'defaults' expected. [ALERT] (11433) : config : Error(s) found in configuration file : /etc/haproxy/haproxy.cfg [ALERT] (11433) : config : Fatal errors found in configuration.