How to Create a Docker Network

Creating a Docker network allows containers to communicate with each other while isolating them from external traffic. This is particularly useful for managing services that need to interact within a defined network. Follow these steps to create a Docker network:

Step 1: Open Your Terminal

Access your terminal or command prompt where Docker is installed.

Step 2: Create a Docker Network

Use the following command to create a new Docker network:

docker network create your_network_name

Replace your_network_name with a name that makes sense for your application.

Step 3: Verify the Network Creation

You can verify that the network was created successfully by listing all Docker networks:

docker network ls

Step 4: Connect Containers to the Network

When you run a container, you can connect it to the created network using the --network option:

docker run -d --name your_container_name --network your_network_name your_image_name

Replace your_container_name with the desired name for your container, and your_image_name with the name of the Docker image you wish to run.

Step 5: Testing Connectivity

To test if containers are communicating properly within the network, you can run a shell inside one of the containers and ping another container:

docker exec -it your_container_name /bin/bash
ping other_container_name

This will confirm that the containers are able to see each other through the Docker network.

Written by A.M. Rinas