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A Docker image to run a dedicated server for ARMA 3.

Running

Sample run command:

docker run -d \
  -p 2344:2344/udp \
  -p 2344:2344 \
  -p 2345:2345 \
  -p 2302-2306:2302-2306/udp \
  fragsoc/arma3

Ports

All ports taken from the wiki page.

Port(s)	TCP	UDP
2344	yes	yes
2345	yes	no
2302-2306 inclusive	no	yes

Volumes

• /config - server configuration
• /profiles - difficulty profiles
• /mods - server mods
• /missions - mission config files

Mods

Steam Workshop Script

The image includes a script to install mods from the steam workshop to the mods volume.

Usage:

docker exec -it <container name> install-mods <steam username> <space-separated list of mod IDs>

You can find the mod IDs in the steam workshop URL: https://steamcommunity.com/sharedfiles/filedetails/?id=MOD_ID_IS_HERE.

Manual

Install mods folders to the /mods volume. The launch script will automatically load them on next server start.

Warning: folders and subfolders may need their names correcting to have no capitals in them (see here)

Building

Run the command:

make build STEAM_USER=<your steam username>

You will probably be prompted to login with steam - this is handled entirely by steamcmd; no code or scripts in this repo ever see your steam credentials.

If you want to rebuild the image with the latest version of ARMA 3, run:

make -B build STEAM_USER=<your steam username>

Dependencies

• steamcmd
• docker, look here for windows or here for linux
• GNU make, usually installed under the build-essential package on linux; on windows, you must use cygwin or the WSL, etc. This can be skipped if you can install the linux build of the server to ./server_files with steamcmd after which you can just run a docker build as you might otherwise.
• a steam account (doesn't need to own the game)

You require a steam account because, for whatever reason, the ARMA 3 dedicated server app on steam cannot be downloaded by the anonymous steam account

Troubleshooting

• If docker reports an error communicating with docker.sock, you may need to run the above command as root

• If an error is thrown saying steamcmd not found, you need to locate your steamcmd executable (which steamcmd) and append it as a variable to the make command:

  make build STEAM_USER=<your steam username> STEAMCMD=<your steamcmd location>

  or:

  make build STEAM_USER=<your steam username> STEAMCMD=$(which steamcmd)

• If you get an instant SEGFAULT from the server when using bind mounts, either change the owner of the mounts to user:group 999:999 or rebuild the image, passing UID=<desired system user ID> to make or as a docker build arg.

Disclaimer

The files in this repo are licensed under the AGPL v3. ARMA 3 is proprietary software owned by Bohemia Ineractive, no credit is taken for their work.