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History

Jef Roosens 92094ff5fc Lowered required dc version for minecraft		2021-04-23 14:43:53 +02:00
..
.env.example	Added configureable base image to minecraft containers	2021-02-02 12:56:54 +01:00
Dockerfile	Added configureable base image to minecraft containers	2021-02-02 12:56:54 +01:00
README.md	Updated Fabric & some other stuff	2021-01-26 14:06:47 +01:00
docker-compose.yml	Lowered required dc version for minecraft	2021-04-23 14:43:53 +02:00
entrypoint.sh	Updated Fabric & some other stuff	2021-01-26 14:06:47 +01:00

README.md

Build arguments

Two build arguments are required, namely MC_VERSION and FABRIC_VERSION. The latter is the version of Fabric you wish to install. You can find the list of versions here. For example, you can then set FABRIC_VERSION=0.6.1.51 in the .env file.

Environment variables

The two possible environment variables are XMS and XMX. These specify the initial RAM & maximum RAM usage respectively. Only XMX is required; XMS is just set to the same value as XMX if not specified. You must specify them as a number, e.g. XMS=4. This number represents a quantity of gigabytes.

Mount points

There a three useful mount points defined:

/app/config: this is where all server config files reside, as well as the mods.
/app/worlds: this is where the world files are stored.

You can mount these directories somewhere in the host file system by specifying the mount paths in the .env file. These can be both absolute or relative paths.

Other config variables

The only other config variable is PORT. This specifies on what port your server will be discoverable over the internet. The default Minecraft port is 25565.

Java flags

I use the Java flags defined here. If you don't agree with this decision, you can change the ENTRYPOINT at the end of the Dockerfile to the following:

ENTRYPOINT java \
-Xms"${XMS:-$XMX}G" \
-Xmx"${XMX}G" \
-jar fabric-server-launch.jar \
--universe /app/worlds \
--nogui

This will only use the flags absolutely necessary, while still allowing you to tweak the memory variables.

Broken symlink

You might've noticed a broken symlink called server.jar in your config directory. This is an (admittedly ugly) fix for the issue where Fabric expects the vanilla server jar to be in the current working directory. Considering a server also has to run within its config directory, this would mean that the vanilla jar should be in the config directory. As I wanted to keep any version-specific data out of the config/worlds directories, I have opted to use a symlink to the server jar in question instead. This symlink can be safely deleted, and will just get re-created when needed.