haproxy.conf.default

#---------------------------------------------------------------------
# Example configuration for a possible web application.  See the
# full configuration options online.
#
#   http://haproxy.1wt.eu/download/1.4/doc/configuration.txt
#
#---------------------------------------------------------------------

#---------------------------------------------------------------------
# Global settings
#---------------------------------------------------------------------
global
    # to have these messages end up in /var/log/haproxy.log you will
    # need to:
    #
    # 1) configure syslog to accept network log events.  This is done
    #    by adding the '-r' option to the SYSLOGD_OPTIONS in
    #    /etc/sysconfig/syslog
    #
    # 2) configure local2 events to go to the /var/log/haproxy.log
    #   file. A line like the following can be added to
    #   /etc/sysconfig/syslog
    #
    #    local2.*                       /var/log/haproxy.log
    #
    log         127.0.0.1 local2

    chroot      /var/lib/haproxy
    pidfile     /var/run/haproxy.pid
    maxconn     4000
    user        haproxy
    group       haproxy
    daemon

    # turn on stats unix socket
    stats socket /var/lib/haproxy/stats


#---------------------------------------------------------------------
# gateway server settings
#---------------------------------------------------------------------
defaults
    log     global
    mode    http
    option  httplog
    option  dontlognull
    timeout connect 5000
    timeout client  50000
    timeout server  50000

#---------------------------------------------------------------------
# http gateway
#---------------------------------------------------------------------
frontend http_web
    bind 0.0.0.0:80
    capture request header X-Forwarded-For len 50
    option forwardfor

    acl frontend01 hdr(host) -i <DomainAddress(ex: www.example.com)>
    use_backend backend01 if frontend01

backend backend01
    server dynmap <DestinationIP>:<DestinationPort> cookie A check

#---------------------------------------------------------------------
# minecraft server gateway
#---------------------------------------------------------------------
listen minecraftsv01
    bind 0.0.0.0:25565
    mode tcp
    option tcplog
    balance roundrobin
    server mc01 <DestinationIP>:<DestinationPort> send-proxy-v2

haproxyのDockerfile

# please rename to Dockerfile

FROM haproxy:latest

ENV HAPROXY_USER haproxy

RUN groupadd --system ${HAPROXY_USER} && \
  useradd --system --gid ${HAPROXY_USER} ${HAPROXY_USER} && \
  mkdir --parents /var/lib/${HAPROXY_USER} && \
  chown -R ${HAPROXY_USER}:${HAPROXY_USER} /var/lib/${HAPROXY_USER}

CMD ["haproxy", "-db", "-f", "/usr/local/etc/haproxy/haproxy.cfg"]

Mineraftサーバ(Java Editon)をhaproxyでreverse proxyするdocker-compose.yml

# please rename to docker-compose.yml

version: '3.3'
  
networks:
  haproxy-network:
    external: false

services:
  haproxy:
    build: .
    #常時起動にするなら以下のコメントアウトを外す(docker自体の常駐化も忘れずに)
    #restart: always
    environment:
      - TZ=Asia/Tokyo
    networks:
      - haproxy-network
    ports:
      - "80:80/tcp"
      - "25565:25565/tcp"
    volumes:
      - ./haproxy.cfg.default:/usr/local/etc/haproxy/haproxy.cfg