mtg/contrib/sni-router/docker-compose.yml

# SNI-routing deployment: HAProxy (443) -> mtg + real web backend
#
# This setup puts an SNI-aware TCP router in front of mtg so that:
#   - Telegram clients (FakeTLS with the correct SNI) are routed to mtg
#   - All other TLS traffic (including DPI probes) reaches the real web
#     server, which responds with a genuine certificate
#
# The result: active probes see a real website; passive DPI sees matching
# SNI/IP because the domain resolves to this server's IP.
#
# Quick start:
#   1. Set DOMAIN in a .env file next to this one (or export it)
#   2. mtg generate-secret YOUR_DOMAIN   -> paste into mtg-config.toml
#   3. docker compose up -d
#
# DOMAIN is forwarded to both Caddy (TLS cert) and HAProxy (SNI ACL),
# so the SNI/cert/secret all line up from a single source.
#
# See BEST_PRACTICES.md and the project wiki for background.

x-domain-env: &domain-env
  DOMAIN: ${DOMAIN:-example.com}

services:
  haproxy:
    image: haproxy:lts-alpine
    # Host networking so HAProxy sees the real client source IP on
    # inbound (bridge networking with published ports rewrites it to
    # the bridge gateway under both Docker's userland-proxy and
    # rootless Podman's slirp4netns/pasta).  See "Why host networking"
    # in README.md.
    network_mode: host
    volumes:
      - ./haproxy.cfg:/usr/local/etc/haproxy/haproxy.cfg:ro,Z
    environment:
      <<: *domain-env
    depends_on:
      - mtg
      - web
    restart: unless-stopped

  mtg:
    image: nineseconds/mtg:2
    volumes:
      - ./mtg-config.toml:/config/config.toml:ro,Z
    # Publish on host loopback so the host-mode HAProxy can reach it.
    ports:
      - "127.0.0.1:3128:3128"
    restart: unless-stopped
    extra_hosts:
      - "host.containers.internal:host-gateway"

  web:
    image: caddy:alpine
    volumes:
      - ./Caddyfile:/etc/caddy/Caddyfile:ro,Z
      - caddy_data:/data
      - ./www:/srv:ro,Z
    # Publish on host loopback so the host-mode HAProxy can reach it.
    # Caddy's HTTP listener is mapped off :80 (occupied by HAProxy)
    # to :8080; haproxy.cfg dials it on 127.0.0.1:8080 for ACME.
    ports:
      - "127.0.0.1:8080:80"
      - "127.0.0.1:8443:8443"
    environment:
      <<: *domain-env
    restart: unless-stopped

volumes:
  caddy_data: