version: '3.9'

# Pre-requisites on the host machine
#
# Since the sysctl option cannot be set and podman needs additional privileges to bind
# to ports lower than 1024, the following options need to be set:
#   sudo sysctl net.ipv4.ip_unprivileged_port_start=25
#   sudo sysctl net.core.somaxconn=4096
#
# Apparently compose extends instead of overrides (except for volumes), see
# https://github.com/docker/compose/issues/3729
# Because of that, the patch-docker-compose-for-podman.sh script exists to remove these options from the original
# docker-compose.yml

services:

  dockerapi-mailcow:
    volumes:
      - ${MAILCOW_CONTAINER_SOCKET}:/var/run/docker.sock:ro

  ofelia-mailcow:
    volumes:
      - ${MAILCOW_CONTAINER_SOCKET}:/var/run/docker.sock:ro

  ipv6nat-mailcow:
    image: bash:latest
    restart: "no"
    entrypoint: ["echo", "ipv6nat disabled in compose.override.yml"]
    # Because docker-compose extends instead of overrides, the volume still needs to be overwritten, even when it is not used.
    volumes:
      - ${MAILCOW_CONTAINER_SOCKET}:/var/run/docker.sock:ro

networks:
  mailcow-network:
    driver: bridge
    ipam:
      config:
        - subnet: ${IPV4_NETWORK:-172.22.1}.0/24