minecraft_backup

Backup script for Minecraft running by docker

DISCLAIMER: This is mainly a repository with stuff to help me remember how I set it up. This might break your system or whatever setup you are using. Maybe you should search for better alternatives but I started from scratch and this is it. I want to switch to rsnapshot and transfer the backups off the machine. (This note can also be read by future me!)

→ Future me: I've switched to LGSM - Linux Game Server Managers and borgmatic

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Currently the setup is too simple:

• 2 Minecraft servers run by docker
• Backups every night to home dir on same server
• Yeah that's it

Check other projects for better usage instead of this one:

• audy/backup-minecraft.rb dockerized minecraft backup
• Lerk's Automagic Minecraft Server Backups With Map Renderings Using GitLab CI and GitLab Pages

Abbreviations in this Readme:

• dc: Docker
• mc: Minecraft

About the server(s)

Image used by docker: itzg/minecraft-server:latest (docker hub)

Servers run by docker with following commands:

Server A

S-U-I at Port 2320.

Minecraft data directory mapped by volume to host directory: /var/docker/dc_mc_sui_data

docker run -d -e EULA=TRUE -e VERSION=1.15.2 -p 2320:25565 -v /var/docker/dc_mc_sui_data:/data --name mc_sui itzg/minecraft-server:latest

Server B

La-Awesome at Port 25565

Minecraft data directory mapped by volume to host directory: /var/docker/dc_mc_laawesome_data

docker run -d -e EULA=TRUE -e VERSION=1.15.2 -p 25565:25565 -v /var/docker/dc_mc_laawesome_data:/data --name mc_laawesome itzg/minecraft-server:latest

Script

Usage: > sh backup_dc_mc.sh <container_name> <rcon_password>

Parameters:

• container_name: The human readable name of the docker container. Docker CLI param --name
• rcon_password: The RCON password of the server (Minecraft server.properties, line rcon.password=xxx)

Backup location

The location is currently hardcoded.

The backup filename is generated with date and time: dc_<container_name>_data_yyyyMMdd_HHmmss.tar.gz

Example: dc_mc_laawesome_data_20191030_042115.tar.gz

Cron

Cron example (no, these rcon passwords are not used anywhere):

# Backup Minecraft Docker Volume files once a day at 4 in the night
# Param 1: Container name
# Param 2: rcon-cli password
#
5 4 * * * sh /home/plpgtr/backup_dc_mc.sh mc_sui 68xEnjaVJFNDaD > /home/plpgtr/logs/backup_dc_mc_sui.log 2>&1
15 4 * * * sh /home/plpgtr/backup_dc_mc.sh mc_laawesome AD9B4gV3Q3J7pB > /home/plpgtr/logs/backup_dc_mc_laawesome.log 2>&1

Update minecraft

Stop both servers and rename the current containers with the version they where running on. Then start the server with the new version.
ATTENTION: Major version strings are 1.16 instead of 1.16.0.

docker stop mc_laawesome
docker stop mc_sui

docker rename mc_laawesome mc_laawesome_1_15_2
docker rename mc_sui mc_sui_1_15_2

docker run -d -e EULA=TRUE -e VERSION=1.16.1 -p 25565:25565 -v /var/docker/dc_mc_laawesome_data:/data --name mc_laawesome itzg/minecraft-server:latest
docker run -d -e EULA=TRUE -e VERSION=1.16.1 -p 2320:25565 -v /var/docker/dc_mc_sui_data:/data --name mc_sui itzg/minecraft-server:latest