Docker custom network detailed introduction

Docker custom network

1. Introduction to custom network

1. Introduction

When starting a regular docker container, you can use --link to bind the container network, but it will be very troublesome once there are more containers. So to customize a docker network, Xiaobai recommends using the --link command.

Custom network fixes the problem that docker0 containers cannot ping each other using container names. They can only ping each other using IP. However, our custom network can ping each other using IP or container name.

2. Command

2. Create a custom network

1. Start the regular container and check whether the container can be pinged

It is found that it is not pingable. Next, we try it with --link

It is found that the container can be pinged after using --link. --link is recommended for novices. Next, let's try it with a custom network.

2. Create a custom network

docker network ls View the network list

There are many types of docker networks

bridge mode

host is consistent with the host network

none Empty network Do not use the network

docker network inspect View network details

docker network create Create a custom network

–driver Set the network type

–subnet Set custom ip routing network group

–gateway Set the default ip route for this network

Here I started two containers and specified the container network with –net. You can see that you can directly ping the containers in the same network. It’s very simple.

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