The Classic Pack server Docker container

The idea is to have a way to create servers for The Classic Pack using Docker.

Motivation

Most guides on how to run a minecraft server use screen to start it but I rather use docker mainly because:

• The ability to automatically restart the server on crash or reboot
• Easier to cleanup
• I like to work with containers :)

Starting the server

The command to start the server:

docker run -dti --restart always --name theclassipack_server -p 25565:25565 theclassicpack

Note that the ti options are required to allow the admins to access the server console.

Accessing server console

To access the server console run:

docker attach theclassipack_server

To exit do not run CTRL+c, instead use the key combination CTRL+p followed by CTRL+q

Managing the server

Useful commands to use on the server console

• Whitelist a player

whitelist add <username>

• Remove player from whitelist

whitelist remove <username>

• List all whitelist players

whitelist list

• OP user

op <username>

• DeOP user

deop <username>

Backup server state

A cron job can be used to regularly backup the server. The following setup is for a daily backup, where the older files is overwritten by the new one which has the same name.

Create a script

#!/bin/bash

WD_TMP=/tmp/wd_minecraft_backup
DAY=$(date +%A)

# Create and set working directory
mkdir $WD_TMP
cd $WD_TMP

# Copy server folder from container
docker cp theclassipack_server:/opt/minecraft .

# Compress backup to reduce space
tar czf /path/to/backupdir/$DAY-minecraft_sv_backup.tar.gz minecraft

# Cleanup temp directory
rm -rf $WD_TMP

Setup a cronjob, this runs every day at 4.30AM

crontab -e
30 4 * * * /path/to/script