Dockerfile for FTB Direwolf20 1.12.1 server for Minecraft 1.10.2
To run:
docker run -d -p 25565:25565 gunsmithy/minecraft-ftb-direwolf20-1.10
where the default server port, 25565, will be exposed on your host machine. If you want to serve up multiple Minecraft servers or just use an alternate port, change the host-side port mapping such as:
docker run -p 25566:25565 ...
will service port 25566.
Speaking of multiple servers, it's handy to give your containers explicit names using --name, such as
docker run -d -p 25565:25565 --name minecraft gunsmithy/minecraft-ftb-direwolf20-1.10
With that you can easily view the logs, stop, or re-start the container:
docker logs -f minecraft
( Ctrl-C to exit logs action )
docker stop minecraft
docker start minecraft
In order to persist the Minecraft data, which you probably want to do for a real server setup, use the -v argument to map a directory of the host to /data:
docker run -d -v /path/on/host:/data -p 25565:25565 gunsmithy/minecraft-ftb-direwolf20-1.10
When attached in this way you can stop the server, edit the configuration under your attached /path/on/host and start the server again with docker start CONTAINERID to pick up the new configuration.
The message of the day, shown below each server entry in the UI, can be changed with the MOTD environment variable, such as:
docker run -d -e 'MOTD=My Server' ...
If you leave it off, the last used or default message will be used.
The Java memory limit can be adjusted using the JVM_OPTS environment variable, where the default is the setting shown in the example (max and min at 4096 MB):
docker run -e 'JVM_OPTS=-Xmx4096M -Xms4096M' ...