version: "3.9"

networks:
  # You need to have a network with static ips for the servers
  mc_network:
    driver: bridge
    ipam:
      driver: default
      config:
        - subnet: 172.20.0.0/16

services:
  auto_starter:
    container_name: mc_auto_starter
    restart: always
    image: dertyp7/minecraft_server_auto_starter:latest
    ports:
      - 25565:25565
      - 25566:25566
    environment:
      # The ip of the placeholder servers below
      PLACEHOLDER_SERVER_SLEEPING_IP: "172.20.0.3"
      PLACEHOLDER_SERVER_STARTING_IP: "172.20.0.4"

      # Port mapping for the servers
      # The key is the external port of the placeholder server
      # The value is the internal ip of the actual server
      # Don't change the server port in the actual server. Use this instead
      PORT_IP_MAP: |
        25565: 172.20.0.5
        25566: 172.20.0.6
    networks:
      mc_network:
        ipv4_address: 172.20.0.2
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock

  # These are the placeholder servers. They are used to show the player a message
  # They are not needed, but they are nice to have
  # Keep in mind these servers are consuming some resources
  mc_placeholder_server_sleeping:
    container_name: mc_placeholder_server_sleeping
    restart: always
    image: itzg/minecraft-server:java8
    environment:
      VERSION: "1.12.2"
      EULA: "TRUE"
      MOTD: "Sleeping | Join to wake up"

      # The placeholder servers should be as lightweight as possible
      MAX_PLAYERS: "0"
      MAX_MEMORY: "512M"
      INIT_MEMORY: "512M"
      LEVEL_TYPE: "FLAT"
      JVM_XX_OPTS: "-XX:+UseConcMarkSweepGC -XX:+DisableExplicitGC -XX:+UseCompressedOops"
      VIEW_DISTANCE: "1"
      SPAWN_ANIMALS: "false"
      SPAWN_MONSTERS: "false"
      SNOOPER_ENABLED: "false"
      GENERATE_STRUCTURES: "false"
      ALLOW_NETHER: "false"
      ALLOW_END: "false"
    networks:
      mc_network:
        ipv4_address: 172.20.0.3

  mc_placeholder_server_starting:
    container_name: mc_placeholder_server_starting
    restart: always
    image: itzg/minecraft-server:java8
    environment:
      VERSION: "1.12.2"
      EULA: "TRUE"
      MOTD: "Starting, please wait..."

      # The placeholder servers should be as lightweight as possible
      MAX_PLAYERS: "0"
      MAX_MEMORY: "512M"
      INIT_MEMORY: "512M"
      LEVEL_TYPE: "FLAT"
      JVM_XX_OPTS: "-XX:+UseConcMarkSweepGC -XX:+DisableExplicitGC -XX:+UseCompressedOops"
      VIEW_DISTANCE: "1"
      SPAWN_ANIMALS: "false"
      SPAWN_MONSTERS: "false"
      SNOOPER_ENABLED: "false"
      GENERATE_STRUCTURES: "false"
      ALLOW_NETHER: "false"
      ALLOW_END: "false"
    networks:
      mc_network:
        ipv4_address: 172.20.0.4

  # These are the actual servers
  # For itzg/minecraft-server you can find the documentation here: https://docker-minecraft-server.readthedocs.io/en/latest/variables/
  mc:
    container_name: example_mc_server_1
    image: itzg/minecraft-server
    restart: no #! This is important. If you restart the server automatically, the auto_starter will not work
    environment:
      type: "PAPER"
      EULA: "TRUE"
      MOTD: "Example Server 1"
      MAX_PLAYERS: "1"

      # Enable autostop, so the auto_starter makes sense
      ENABLE_AUTOSTOP: "TRUE"
      AUTOSTOP_TIMEOUT_EST: "10"
      AUTOSTOP_TIMEOUT_INIT: "10"
      #! Dont change SERVER_PORT. Use PORT_IP_MAP in auto_starter instead.
      #! SERVER_PORT default is "25565"
    networks:
      mc_network:
        ipv4_address: 172.20.0.5
  mc2:
    container_name: example_mc_server_2
    image: itzg/minecraft-server
    restart: no #! This is important. If you restart the server automatically, the auto_starter will not work
    environment:
      type: "PAPER"
      EULA: "TRUE"
      MOTD: "Example Server 2"
      MAX_PLAYERS: "1"

      # Enable autostop, so the auto_starter makes sense
      ENABLE_AUTOSTOP: "TRUE"
      AUTOSTOP_TIMEOUT_EST: "10"
      AUTOSTOP_TIMEOUT_INIT: "10"
      #! Dont change SERVER_PORT. Use PORT_IP_MAP in auto_starter instead.
      # SERVER_PORT default is "25565"
    networks:
      mc_network:
        ipv4_address: 172.20.0.6