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Getting Started with Docker (XI) -- Network Configuration Summary

2024-07-11

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One of the core advantages of Docker container technology is its lightweight virtualization and isolation, and Docker network is the key to achieve communication between containers and between containers and the outside world. The following is a summary of the key knowledge points of Docker network.

1. Docker Network Overview

Docker networks allow containers to communicate with each other and with external networks. Docker provides a variety of network types and drivers to meet different network needs:

  • Bridge: The default network type, the docker0 bridge created when Docker is installed, is suitable for container interconnection on a single host.
  • Host: The container and the host share a network stack, which is suitable for scenarios where the container and the host need to share network resources.
  • Overlay: A distributed network across multiple Docker daemons, suitable for containers to communicate across hosts.
  • Macvlan: Assign independent MAC addresses to containers so that they can be directly connected to the physical network.

2. Docker Network Configuration

Docker network configuration includes creating a network, connecting containers to the network, configuring IP addresses, etc.:

  • Create a new network using docker network create.
  • Use docker network connect to connect a container to an existing network.
  • Use docker network inspect to view network details.
  • Configure the container IP address, which can be statically or dynamically assigned.

1. Create a custom network

docker network create --driver bridge my-custom-network