"Unable to find registered backend"

[beboprocky]

Greetings! I'm trying to figure out how MC-Router works. My current configuration:

My Domain Provider has my "server.com" address pointed at my router. (using "server.com" as a placeholder for my actual domain for this post) I have port 25565 open on my router. This is directed towards my server. My docker compose is using the example one provided, exactly as written:

version: '3.4'

services:
  vanilla:
    image: itzg/minecraft-server
    environment:
      EULA: "TRUE"
  forge:
    image: itzg/minecraft-server
    environment:
      EULA: "TRUE"
      TYPE: FORGE
  router:
    image: ${MC_ROUTER_IMAGE:-itzg/mc-router}
    depends_on:
      - forge
      - vanilla
    environment:
      # enable API
      API_BINDING: ":25564"
    ports:
      - 25565:25565
      # bind the API port to only loopback to avoid external exposure
      - 127.0.0.1:25564:25564
    command: --mapping=vanilla.example.com=vanilla:25565,forge.example.com=forge:25565

When I attempt to connect to the server, I receive the following message in the "mc-router" container logs: time="2023-10-27T13:13:58Z" level=warning msg="Unable to find registered backend" resolvedHost=forge.server.com serverAddress=forge.server.com

The containers for each world seem to be running. The last log message for each server is: [13:17:29] [Server thread/INFO]: RCON running on 0.0.0.0:25575

I have tried without a firewall. I have also tried using NGINX proxy manager to direct both urls "vanilla.server.com" and "forge.server.com" to my MC host machine's 25565 port.

Thank you for any help you can provide. I very much appreciate the work that went into getting the MC server running in Docker.

[itzg]

In the command for the router service, change those "example.com" domains to your "server.com" ones. Mc-router is comparing the hostname in the client sent handshake message against those mappings to determine which backend is being requested by the client.

[itzg]

...if that still isn't working, setting DEBUG env var to "true" can reveal more details about what it is trying to do.

[beboprocky]

That worked. You can mark this as solved/embarrassed. Thanks for the help!