How to share network between Docker containers?

There are several ways to share the network between Docker containers. Here are some of them:

1. Linking Containers: Use the `—link` option to enable communication between two containers. It makes it possible for the container to access another container’s details using environment variables.

\`\`\` docker run -d —name test1 —link test2:test2 \`\`\`

1. Bridge Networks: These networks provide automatic DNS resolution between containers. A bridge network is created by Docker itself when the system is initialized.

- Create a bridge network. \`\`\` docker network create —driver bridge bridge\_network \`\`\`

- Run the containers inside this network. \`\`\` docker run -d —net=bridge\_network —name test1 docker run -d —net=bridge\_network —name test2 \`\`\`

1. Host networking: When using host networking, the container shares the host’s network stack and all interfaces from the host are available to the container. \`\`\` docker run —net=host \`\`\`

1. Shared Network namespaces: The use of `—net=container:` option creates shared network namespace. The new container’s network stack is the same as the specified container.

\`\`\` docker run —net=container:test1 \`\`\`

1. Overlay Networks: Overlay network allows swarm services to communicate with each other. It is mainly for Docker swarm and services.

– Create an overlay network. \`\`\` docker network create -d overlay my-overlay-network \`\`\` – Run the service inside this network. \`\`\` docker service create —network=my-overlay-network —name myservice \`\`\`

Remember, the method of network sharing hugely depends on the requirements and architecture of your application. It is important to choose the correct method for faultless communication between containers.