nginx-proxy/test/test_ipv6/test_ipv6-prefer-ipv4-network.yml

networks:
  ipv4net:
    ipam:
      config:
        - subnet: 172.16.10.0/24
  dualstacknet:
    enable_ipv6: true
    ipam:
      config:
        - subnet: 172.16.20.0/24
        - subnet: fd00:cafe:face:feed::/64

services:
  nginx-proxy:
    networks:
      ipv4net:
        ipv4_address: 172.16.10.3
      dualstacknet:
        ipv4_address: 172.16.20.3
        ipv6_address: fd00:cafe:face:feed::3

  ipv4only:
    image: web
    expose:
      - "80"
    environment:
      WEB_PORTS: "80"
      VIRTUAL_HOST: ipv4only.nginx-proxy.tld
    networks:
      ipv4net:
        ipv4_address: 172.16.10.2

  dualstack:
    image: nginx:alpine
    environment:
      VIRTUAL_HOST: dualstack.nginx-proxy.tld
    networks:
      dualstacknet:
        ipv4_address: 172.16.20.2
        ipv6_address: fd00:cafe:face:feed::2