Docker Compose — Compose Networks
Master networking in Docker Compose — from the default bridge to custom networks, aliases, and cross-compose connectivity.
What You Will Learn
| # | Topic | Description |
|---|---|---|
| 1 | Default Network | How Compose auto-creates a network |
| 2 | Custom Networks | Defining and using named networks |
| 3 | Network Drivers | Bridge, host, overlay, and macvlan |
| 4 | Aliases and Links | Service discovery and DNS aliases |
| 5 | Cross-Compose Networking | Connecting services across projects |
| 6 | Practice Exercises | Hands-on network challenges |
Why Networking Matters
┌─────────────────────────────────────────┐
│ Docker Compose Project │
│ │
│ ┌─────────┐ ┌─────────┐ │
│ │ web │──DNS──▶│ api │ │
│ └─────────┘ └────┬────┘ │
│ │ │
│ ┌────▼────┐ │
│ │ db │ │
│ └─────────┘ │
│ │
│ [ default network ] │
└─────────────────────────────────────────┘
Compose creates a default network so containers can find each other by service name. Custom networks give you fine-grained isolation and multi-project connectivity.
