Docker inbuilt service discovery

The Docker platform inherently supports the service discovery for the containers that are attached to any user-defined network using an embedded Domain Name Service (DNS). This functionality has been added to Docker since the version 1.10. The embedded DNS feature enables the Docker containers to discover each other using their names or aliases within the user-defined network. In other words, the name resolution request from the container is first sent to the embedded DNS. The user-defined network then uses a special 127.0.0.11 IP address for the embedded DNS, which is also listed in /etc/resolv.conf.

The following example will help to gain a better understanding of Docker's built-in service discovery capability:

1. Let's begin by creating a user-defined bridge network, mybridge, using the following command:

      $ sudo docker network create mybridge

2. Inspect the newly...