You've built your first containerized application, and now you want to connect it to another container that, say, has a database. And, you don't want to have to do the manual work of launching the containers and checking to see if they're still running.. and if not, relaunching them.
It's at this point that you realize you're run into a challenge: Container networking. Now, imagine if you're running a hundred containers that need to call into each other, despite perhaps being removed from one application and plugged into another.
This book from NGINX and O'Reilly Media is an excellent guide to understanding container networking, and how you can overcome the challenges presented. Download it today!