version: '3.7'
services:
  moxmail:
    # todo: understand why hostname and/or domainname don't have any influence on the reverse dns set up by docker, requiring us to use our own /etc/resolv.conf...
    hostname: moxmail1.mox1.example
    domainname: mox1.example
    build:
      dockerfile: Dockerfile.moxmail
      context: testdata/integration
    volumes:
      - ./.go:/.go
      - ./testdata/integration/resolv.conf:/etc/resolv.conf
      - .:/mox
    environment:
      GOCACHE: /.go/.cache/go-build
    healthcheck:
      test: netstat -nlt | grep ':25 '
      interval: 1s
      timeout: 1s
      retries: 10
    depends_on:
      dns:
        condition: service_healthy
      postfixmail:
        condition: service_healthy
    networks:
      mailnet1:
        ipv4_address: 172.28.1.10
      mailnet2:
        ipv4_address: 172.28.2.10
      mailnet3:
        ipv4_address: 172.28.3.10

  postfixmail:
    hostname: postfixmail.postfix.example
    domainname: postfix.example
    build:
      dockerfile: Dockerfile.postfix
      context: testdata/integration
    volumes:
      # todo: figure out how to mount files with a uid that the process in the container can read...
      - ./testdata/integration/resolv.conf:/etc/resolv.conf
    command: ["sh", "-c", "set -e; chmod o+r /etc/resolv.conf; (echo 'maillog_file = /dev/stdout'; echo 'mydestination = $$myhostname, localhost.$$mydomain, localhost, $$mydomain') >>/etc/postfix/main.cf; echo 'root: moxtest1@mox1.example' >>/etc/postfix/aliases; newaliases; postfix start-fg"]
    healthcheck:
      test: netstat -nlt | grep ':25 '
      interval: 1s
      timeout: 1s
      retries: 10
    depends_on:
      dns:
        condition: service_healthy
    networks:
      mailnet1:
        ipv4_address: 172.28.1.20

  dns:
    hostname: dns.example
    build:
      dockerfile: Dockerfile.dns
      # todo: figure out how to build from dockerfile with empty context without creating empty dirs in file system.
      context: testdata/integration
    volumes:
      - ./testdata/integration/resolv.conf:/etc/resolv.conf
      - ./testdata/integration:/integration
    command: ["sh", "-c", "set -e; chmod o+r /etc/resolv.conf; install -m 640 -o unbound /integration/unbound.conf /integration/*.zone /etc/unbound/; unbound -d -p -v"]
    healthcheck:
      test: netstat -nlu | grep '172.28.1.30:53 '
      interval: 1s
      timeout: 1s
      retries: 10
    networks:
      mailnet1:
        ipv4_address: 172.28.1.30

networks:
  mailnet1:
    driver: bridge
    ipam:
      driver: default
      config:
        - subnet: "172.28.1.0/24"
  mailnet2:
    driver: bridge
    ipam:
      driver: default
      config:
        - subnet: "172.28.2.0/24"
  mailnet3:
    driver: bridge
    ipam:
      driver: default
      config:
        - subnet: "172.28.3.0/24"