DRB Server

The server-side stack for the Discord Radio Bot system. Handles command-and-control, Firestore sync, Discord slash commands, and the web frontend.

Services

Service	Description	Port
mosquitto	MQTT broker — receives telemetry from edge nodes	1883
c2-core	FastAPI C2 API — processes MQTT, writes to Firestore, manages nodes/systems/tokens	8888
discord-bot	Discord bot — /join, /leave, /status slash commands	—
frontend	Next.js admin UI — real-time dashboard, node management, call history	3000

Prerequisites

• Docker + Docker Compose
• A Firebase project with Firestore enabled (Native mode)
• A GCP service account key with Firestore and Firebase Auth permissions
• A Discord bot token (for the server bot that handles slash commands)
• One or more Discord bot tokens in the token pool (for edge nodes to join voice channels)

Setup

# 1. Copy env files
make setup

# 2. Fill in secrets
#    drb-c2-core/.env       — MQTT, Firestore database name, GCS bucket
#    drb-server-discord-bot/.env — Discord bot token, C2 URL
#    drb-frontend/.env      — Firebase config (NEXT_PUBLIC_*), C2 URL

# 3. Place your GCP service account key
cp /path/to/your-key.json drb-c2-core/gcp-key.json

# 4. Build and start
make build
make up

Environment Variables

drb-c2-core/.env

Variable	Description
MQTT_BROKER	Hostname of the MQTT broker (default: mosquitto)
FIRESTORE_DATABASE	Firestore database name (default: (default))
GCP_CREDENTIALS_PATH	Path to the GCP key file inside the container
GCS_BUCKET	GCS bucket name for audio uploads (optional)

drb-server-discord-bot/.env

Variable	Description
DISCORD_TOKEN	Bot token for the server-side command bot
C2_URL	Internal URL of c2-core (default: http://c2-core:8000)
DEV_GUILD_ID	Optional guild ID to sync slash commands instantly during dev

drb-frontend/.env

Variable	Description
NEXT_PUBLIC_FIREBASE_*	Firebase project config (from Firebase console)
NEXT_PUBLIC_FIRESTORE_DATABASE	Firestore database name (must match c2-core)
NEXT_PUBLIC_C2_URL	C2 API URL reachable from the browser

Admin Setup

After the stack is running, grant admin access to your Firebase user:

cd drb-c2-core
python scripts/set_admin.py grant your@email.com

Then sign out and back in to the frontend.

Makefile Targets

make setup    — copy .env.example files
make build    — docker compose build
make up       — docker compose up -d
make down     — docker compose down
make logs     — follow all logs
make logs-c2       — c2-core logs only
make logs-bot      — discord-bot logs only
make logs-frontend — frontend logs only

Architecture

Edge Node (client machine)
    │
    ├── MQTT checkin/status/metadata ──► mosquitto ──► c2-core ──► Firestore
    │
    └── MQTT commands ◄─────────────────────────────── c2-core
              │
              └── discord_join ──► edge node joins Discord voice + streams Icecast

Discord User
    │
    └── /join /leave /status ──► discord-bot ──► c2-core ──► MQTT ──► edge node

Browser (admin)
    └── frontend ──► Firestore (real-time reads)
                └── c2-core REST API (writes/commands)