Chat App with AnyCable and Docker Compose

This is a WebSocket-enabled chat application using Rails, AnyCable, Redis, and Docker Compose. It runs three separate AnyCable instances, each accessible via different URLs.

Features

• Rails app serving a chat interface
• WebSocket support using AnyCable
• Multiple AnyCable instances on different ports
• Redis-based messaging
• Monitoring with Prometheus and Grafana

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Running the App with Docker Compose

1. Build and Start Services

docker-compose up --build

This will start all services defined in docker-compose.yml:

• Rails app on port 3000
• Redis on port 6379
• AnyCable WebSocket servers on ports 8081, 8082, 8083
• Prometheus on port 9091
• Grafana on port 3001

2. Access the Rails App

Open your browser and go to:

http://localhost:3000/

3. Connect to Different AnyCable Instances

The WebSocket server is determined by the URL path:

URL	WebSocket Port
http://localhost:3000/	8081
http://localhost:3000/1	8081
http://localhost:3000/2	8082
http://localhost:3000/3	8083

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How It Works

• The Rails app serves the chat page (show.html.erb), where the WebSocket URL is dynamically determined based on the URL path (/1, /2, /3).
• AnyCable instances (anycable-1, anycable-2, anycable-3) handle WebSocket connections.
• Redis is used for broadcasting messages between AnyCable instances.
• Prometheus and Grafana monitor WebSocket metrics.

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