If you’re deploying a multi-container app via cPanel, and your API image is running fine, but it needs to connect to:

1. The Redis container (for caching or sessions),
2. The Database container (e.g., MySQL/PostgreSQL/etc.)

To enable communication between your containers, especially when using cPanel (which might be using Docker or Podman under the hood), you need to make sure they are:

• On the same Docker network
• Using the container name as hostname when calling each other

✅ Steps to ensure API can reach Redis and Database:

1. Use a custom bridge network

This ensures containers can talk to each other by name.

docker network create app-network

2. Run your containers on that network

# Redis
docker run -d --name redis --network app-network redis

# Database (example: PostgreSQL)
docker run -d --name db --network app-network -e POSTGRES_PASSWORD=secret postgres

# API
docker run -d --name api --network app-network your-api-image

3. Update your API configuration
For Redis:
REDIS_HOST=redis
REDIS_PORT=6379

For Database:
DB_HOST=db
DB_PORT=5432  # or 3306 for MySQL

Make sure your API code uses environment variables (or hardcoded names) like redis and db as hostnames.

🛠 If you're using cPanel's GUI:
If you're not using SSH but managing containers through cPanel's Docker Manager or Application Manager, look for:

A way to assign the same network name to all containers.

Define environment variables for REDIS_HOST and DB_HOST.