Minecraft Vanilla Server for Docker

A simple Docker container for running a vanilla Minecraft server:

• Mount your configuration, datapacks, or entire existing world as volumes
• Logs only to STDOUT for easy collection and less disk activity
• Gracefully shuts down the server when Docker stops the container

Basic Usage

docker run --rm -it -e EULA=true \
    -p 25565:25565 -p 25575:25575 \
    -v $(pwd)/overrides:/opt/minecraft/overrides \
    -v $(pwd)/server:/opt/minecraft/server \
    hannahfamily/mc-server-vanilla

Mounts the overrides and server directories in your current directory into the container, copies the overrides and default configuration into the config directory, accepts the Minecraft EULA, exposes the server and RCON ports and starts the server. If a world exists in the server directory, the server will load it; if not, one will be generated. Your Minecraft client can connect to the server at localhost:25565; others on your local network can connect at <your local IP address>:25565. RCON must be enabled in the server properties file; if you don't want or need it, you can leave out the -p 25575:25575 option.

Stopping the Server

Type stop into the server console, or from another terminal:

docker stop $(docker ps -lq)

(i.e. stop the most recently started Docker container).

Customization

Server Configuration

Any configuration files placed in the overrides directory that gets mounted into the container will be read (but not modified) by the server when it runs. To let the server make changes to the configuration, mount a directory to /opt/minecraft/config instead. Any files not overriden will be copied from the default configuration. You can use the default configuration for reference, e.g. if you want to generate a world from a specific seed value.

Load an Existing World

Likewise, if you have an existing world, just put its data directory (e.g. world) under the server directory that you mount into the container, and it will be loaded instead of a new world being generated.

Datapacks

You can place datapacks into server/world/datapacks (where server is the directory mounted to /opt/minecraft/server in the container), and they will be loaded by the server. If you're generating a new world, you can create those directories and place your datapacks, and they won't be erased when the world is generated.

Exposing On Custom Ports

If you want to run the server on specific ports (e.g. to run multiple servers on a single machine), simply change the first number in each -p option of the docker run command. For example, to use ports 56001 and 56002:

docker run --rm -it -e EULA=true \
    -p 56001:25565 -p 56002:25575 \
    -v $(pwd)/overrides:/opt/minecraft/overrides \
    -v $(pwd)/server:/opt/minecraft/server \
    hannahfamily/mc-server-vanilla

Or to have Docker automatically assign random unused ports, replace both -p arguments with a single -P:

docker run --rm -it -e EULA=true -P \
    -v $(pwd)/overrides:/opt/minecraft/overrides \
    -v $(pwd)/server:/opt/minecraft/server \
    hannahfamily/mc-server-vanilla

and then run docker ps in another terminal to see the assigned ports.

Note: Changing the port numbers in the server.properties file will have no effect; the startup script always resets query.port, server-port, and rcon.port before starting the server, so the server process is always listening on ports 25565 and 25575 within the Docker container. Docker handles directing traffic from the ports assigned to the container on your system to the container's internal ports. If you don't want your server to be available on the default Minecraft ports, use either of the above methods to change it.

Environment Variables

EULA

(Default: false) Set to true to accept the Minecraft EULA. This must be done explicitly by the server operator, or a file named eula.txt with a line containing only eula=true must be in the directory mounted at /opt/minecraft/overrides.

HEAP_SIZE

(Default: 1024) Amount of memory (in MiB) allocated to the JVM. This value can be increased depending on server load (players, redstone, &c.) and available system resources.

JVM_OPTS

Additional options passed to the JVM.

RCON_PASSWORD

(Default: empty string) Sets the password for RCON connections. If set, this overrides any value set in the server.properties file.

SERVER_OPTS

Additional options passed to the Minecraft server.

Credits

Copyright (c) 2019 Hannah Family. Licensed under the terms of the MIT License.

Inspired heavily by @itzg/docker-minecraft-server, and uses @itzg/mc-server-runner to handle graceful shutdown. Default configuration files are generated by version 1.14.4 of Minecraft Java Edition. Minecraft © 2009-2019 Mojang. "Minecraft" is a trademark of Mojang Systems AB.