What is the method for two Docker containers to communicate with each other?

There are several ways to enable communication between two Docker containers:

1. Using Docker Network: You can establish a Docker network and connect the containers that need to communicate within that network. This allows the containers to communicate with each other using either the container name or IP address. Docker offers various network drivers such as bridge, overlay, etc, so you can choose the appropriate driver based on your needs.
2. When using Docker-compose to manage multiple containers, you can define network connections between the containers in a compose file. Docker-compose will automatically create a shared network for these containers and communicate using service names.
3. Container linking is an old method that allows one container to be linked to another container when creating them, which automatically injects the target container’s network information into the source container, enabling them to communicate with each other.
4. Connecting to an external network allows your container to communicate with the host or other external systems by using the host’s network interface.

These methods can all facilitate communication between containers, and you can choose the one that best suits your specific needs.