CS2 Server on ARM64 using FEX

Major thanks to sa-shiro/Satisfactory-Dedicated-Server-ARM64-Docker, they figured the hardest part out.

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Getting Started

1. Download or Clone Repository:
   You can download this repository by either the code button above or using
   git clone https://github.com/ayayrom/CS2-ARM64-Server-FEX.git Next, you'll want to cd into it using this: cd CS2-ARM64-Server-FEX

2. Setting up file system:
   WIP, will do something about the security later

   • First, make the directories cs2-data and fex-data. You can accomplish this by doing mkdir -p cs2-data fex-data.
   • Second, give the directories permission by
     • Using chmod:

       sudo chmod 777 cs2-data
       sudo chmod 777 fex-data
       sudo chmod 777 init-server.sh
       sudo chmod +x init-server.sh
       

     • Using chown (replace USER_ID:GROUP_ID with the desired user's IDs, for example, 1000:1000):

       sudo chown -R USER_ID:GROUP_ID cs2-data
       sudo chown -R USER_ID:GROUP_ID fex-data
       

       (On Oracle Cloud Infrastructure (OCI), by default, the user with the ID 1000:1000 is opc. However, since this user is primarily intended for the setup process, it is advisable to utilize the ubuntu user with IDs 1001:1001)

3. Build the Docker Image:
   This section will take about ~15 minutes to compile from source. If it goes beyond that, check to make sure the compilation isn't stuck.
   Run the command IF YOU ARE USING ORACLE CLOUD'S AMPERE:

   sudo docker build -t cs2-arm64 -f Dockerfile .
   

   Run the command IF YOU ARE USING SOMETHING ELSE:

   sudo docker build -t cs2-arm64 -f Dockerfile.generic .
   

4. Run the Docker Image:
   To run the docker image, run the command:

   sudo docker compose up -d
   

   If you want to follow the logs after it is running, run the command:

   sudo docker compose logs -f
   

5. Port Access and Forwarding:
   On your router (or Oracle Cloud Security List), open the ports 27015 TCP and UDP. 27015 is the default port for Counter-Strike 2 servers.

   You will also need to allow the port over the firewall. This can be done however your system is built. For this example, I will be showcasing an example of UFW. Run the command to allow port 27015/tcp and udp to communicate to the outside world:

   sudo ufw allow 27015/tcp
   sudo ufw allow 27015/udp
   sudo ufw reload
   

Once you finish step 5, congrats! The server is now ready to be used.

Modifying Docker Compose Config

• If you want to change the port to some other port, you can add -port <port> to the EXTRA_PARAMS and change the Docker Compose ports as well.
• All EXTRA_PARAMS can be found by googling what you need. I cannot help you and will not help you on finding all the extra parameters that can be added. The current EXTRA_PARAMS is good enough for the server to run.
• Currently, installing MetaMod and CounterStrikeSharp is available. This will change in the future when I can dedicate some time to polishing this project.
• If you are installing plugins onto the server, you MUST disable ALWAYS_UPDATE_ON_START and enable INSTALL_MODDING. You must also change DOTNET_EnableWriteXorExecute to 0.
• You can find your STEAM_GAMESERVER_API by visiting Valve's GameServer page. Once you go in there, you can create a new game server account by putting 730 in the App ID textbox, and whatever you want for the memo. I recommend putting cs2-arm server in the memo.
• I am still learning about docker compose, so this may be very insecure and I am sorry about that.

Common Questions

• Q: Can the server handle 10 players?
  • A: In my experience, I have not hosted a 10man yet. I have tested it with bot 10v10s, and it was spitting out Slow Server Frame almost every second. I have used it for a 1v1 on a custom workshop map. It was fine with almost no noticeable lag.
• Q: How do I install and play custom workshop maps?
  • A: In your linux terminal (not Counter-Strike!), run

    sudo docker attach cs2-server
    

    If the server hasn't finished initializing, wait for it to finish until the server is running properly. When it is finished, input this command:

    host_workshop_map <workshop ID>
    

    If you don't know how to find workshop ID's, Google is your best friend. To exit out of the attached terminal, do CTRL+P and CTRL+Q in that order.
• Q: Can I optimize the server?
  • A: Yes, however, I have no idea if these options are secure for your system. I am currently using them, but I do not recommend these options if you value security. Input this json in fex-data/Config.json:

    {
    "Config": {
      "SilentLog": "0",
      "EnableCodeCacheValidation": "0",
      "X87ReducedPrecision": "1",
      "StrictInProcessSplitLocks": "0",
      "DisableTelemetry": "1",
      "EnableCodeCachingWIP": "0",
      "DynamicL1Cache": "0",
      "HalfBarrierTSOEnabled": "0",
      "KernelUnalignedAtomicBackpatching": "1",
      "DisableL2Cache": "0",
      "MaxInst": "5000",
      "MemcpySetTSOEnabled": "0",
      "RootFS": "Ubuntu_22_04",
      "Multiblock": "1",
      "VectorTSOEnabled": "0",
      "TSOEnabled": "0",
      "SMCChecks": "1"
      },
    "ThunksDB": {}
    }
    

• Q: My question isn't here!
  • A: If your question isn't here, visit the issues page and make an issue about it. I will add your question here if it already isn't here.

Extra Ramblings

To be honest, a lot of GPT was used to make this project. Most of the time, when I didn't know something, I had it research things for me. This included the majority of the Dockerfile, the optimization of the FEX-Emulator, the parts including FEXRootFSFetcher, and docker compose patch for CounterStrikeSharp. I did not have the knowledge or the time for learning the FEX-Emulator properly.

However, it works. And that I am glad about. And I hope that this works for you, otherwise this was all for naught.

I have also tried to compress zThundy/CS2-Server-on-ARM's Box64 implementation into a docker compose file, but it was riddled with segmentation faults left and right. When Box64 comes to be more stable, I will attempt it again, but for now, FEX will do.