Docker and Containers (4): Networking and Volumes — How Containers Talk and Persist

Mon, 19 Jun 2023 09:00:00 +0000

Containers are deliberately isolated. That’s the point. But useful applications need to accept connections from the outside world, talk to databases, and store data that survives container restarts. Docker provides two mechanisms for this: networks (for communication) and volumes (for persistent storage). Getting these right makes the difference between a demo and a deployment.

Docker Networking#

When Docker starts, it creates a virtual network infrastructure on the host. Each container gets its own network namespace (with its own IP address, routing table, and network interfaces), and Docker manages the traffic flow between containers and the outside world.

Volumes on Chen Kai Blog

Docker and Containers (4): Networking and Volumes — How Containers Talk and Persist

Docker Networking#