Ansible-HAProxy-Failover/roles/haproxy/templates/example.haproxy.cfg.j2

global
  log /dev/log    local0
  log /dev/log    local1 notice
  chroot /var/lib/haproxy
  stats socket /var/lib/haproxy/stats
  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 no-sslv3 no-tlsv10 no-tlsv11 no-tls-tickets
  tune.ssl.default-dh-param 2048
  tune.h2.initial-window-size 1048576

defaults
  log global
  mode    http
  option  dontlognull
  timeout connect 5000
  timeout client 50000
  timeout server 50000
{% if ansible_os_family == 'Debian' %}
  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
{% endif %}

listen stats
  bind *:9999
  stats enable
  stats refresh 30s
  stats show-node
  stats uri  /stats

################################## Frontend ##################################

frontend ssh-in
  mode tcp
  option  tcplog
  bind {{ haproxy_shared_ip }}:22
  timeout client 0ms

  tcp-request inspect-delay 5s
  acl valid_payload req.payload(0,7) -m str "SSH-2.0"
  tcp-request content reject if !valid_payload
  tcp-request content accept if { req_ssl_hello_type 1 }
  
  use_backend example-ssh-backend

frontend http-in
  bind {{ haproxy_shared_ip }}:80
  mode http
  option  httplog

  # Redirect all urls to not use www
  http-request redirect prefix http://%[hdr(host),regsub(^www\.,,i)] code 301 if { hdr_beg(host) -i www. }
  
  # Redirect if HTTPS is not used and not an acme challenge
  redirect scheme https code 301 if !{ ssl_fc } !{ path_beg /.well-known/acme-challenge }

  # Use mapping file to match domain names to req.hdr(host) that are doing a let's encrypt validation
  use_backend %[req.hdr(host),lower,map_dom(/etc/haproxy/maps/example-letsencrypt.map)] if { path_beg /.well-known/acme-challenge }

frontend https-passthrough-in
  bind {{ haproxy_shared_ip }}:443
  mode tcp
  option  tcplog
  tcp-request inspect-delay 1s
  tcp-request content accept if { req.ssl_hello_type 1 }

  # Use mapping file to match domain names to req.ssl_sni
  use_backend %[req.ssl_sni,lower,map_dom(/etc/haproxy/maps/example-passthrough.map)]

  # If match is not found, redirect to the tcp_to_http-backend for https-termination
  default_backend tcp_to_http-backend

frontend https-termination-in
  bind 127.0.0.1:8443 ssl crt /etc/haproxy/ssl/ alpn h2,http/1.1 accept-proxy
  mode http
  option  httplog
  tcp-request inspect-delay 1s
  tcp-request content accept if { req.ssl_hello_type 1 }

  # Use mapping file to match path
  use_backend %[path,lower,map_beg(/etc/haproxy/maps/example-path.map)]

  # Use mapping file to match domain names to ssl_fc_sni
  use_backend %[ssl_fc_sni,lower,map_dom(/etc/haproxy/maps/example-termination.map)]

################################## Backend ##################################

backend tcp_to_http-backend
  mode tcp
  server haproxy 127.0.0.1:8443 send-proxy

backend example-ssh-backend
  mode                    tcp
  timeout connect         0ms
  timeout server          0ms
  server                  example 10.1.25.92:22 check

backend example-letsencrypt-backend
  mode                    http
  server                  example 10.1.25.92:60080

backend example-http-backend
  mode                    http
  server                  example 10.1.25.92:80 check

backend example-https-passthrough-backend
  mode                    tcp
  server                  example 10.1.25.92:443 check

backend example-https-termination-backend
  mode                    http
  server                  example 10.1.25.92:80 check