Dockerized Vanilla Terraria Server

Instructions

Set up two folders, one should be mounted to /world and contain your world files. The other should be mounted to /config and contain a single file: serverconfig.txt. This file is your server config file as described here. In your config file, make sure worldpath=/world and world=/world/<worldname>.wld. If you do not already have a world, you can use the autocreate option to make the server create the world.

For security, you should set up a dedicated user for Terraria. Grant permissions on the two folders to that user.

Sample docker-compose.yml

---
services:
  terraria:
    image: kaysond/docker-terraria
    container_name: terraria
    user: 7777:65534
    restart: unless-stopped
    stdin_open: true
    tty: true
    ports:
      - 7777:7777
    volumes:
      - ./config:/config
      - ./world:/world
    read_only: true
    cap_drop:
      - ALL
    security_opt:
      - no-new-privileges
    pids_limit: 512
    mem_limit: 4G
    cpus: 2

If you want to use the interactive console, you can re-attach to the container via docker attach terraria.

Sample serverconfig.txt

world=/world/World.wld # Do not change this unless you have a world file that has already been created
autocreate=2 # Auto create a medium size world if /world/World.wld doesn't exist
worldpath=/world # Auto create will save the world file to <worldpath>/World.wld
worldname=Terraria
difficulty=0 # Sets the difficulty of the map ; 0=Normal ; 1=Expert ; 2=Master ; 3=Journey