Docker Networking Tutorial (Bridge - None - Host - IPvlan - Macvlan - Overlay)

Step-by-Step Tutorial: Docker Networking Techniques

Introduction to Docker Networking

1. Docker allows you to run and manage containers on your local machine or server.
2. Different networking options in Docker include Bridge, None, Host, IPvlan, Macvlan, and Overlay.
3. Bridge network is the default network created by Docker, but it's not recommended for production.

Setting Up Custom Bridge Network

1. To create a custom bridge network, use the docker network create command with a specified subnet and gateway.
2. Containers within a custom bridge network can communicate with each other using DNS.
3. Use Linux for optimal performance with Docker networking.

Using Host Network

1. Host network mode allows the container to use the host's network stack directly.
2. This mode is useful for performance optimization and when multiple ports need to be bound to the host.
3. Containers in host network mode are isolated only by the loopback interface.

Working with IPvlan and Macvlan

1. IPvlan and Macvlan provide direct access to the host network for containers.
2. Containers using IPvlan share the same MAC address as the host, while Macvlan assigns a different MAC address.
3. These modes are useful for legacy applications requiring direct physical network connections.

Implementing Overlay Network

1. Overlay network driver creates a distributed network among multiple Docker hosts.
2. It is commonly used with Docker Swarm for container orchestration at scale.
3. Individual containers can also be connected to the overlay network for secure communication.

Demo: Connecting Containers to Overlay Network

1. Set up Docker Swarm with manager and worker nodes on separate VMs.
2. Create an attachable overlay network on the manager node using docker network create command.
3. Start containers on worker nodes using the overlay network for communication between containers on different VMs.

Conclusion

1. Docker networking offers various options for different use cases.
2. Choose the appropriate networking mode based on your application requirements and deployment environment.
3. Explore more tutorials on Docker networking, Kubernetes, databases, and infrastructure components for further learning.

By following these steps, you can gain a better understanding of Docker networking techniques and effectively manage containers in various network environments.