Docker Deep Dive

6: Images

In this chapter we’ll dive deep into Docker images. The aim of the game is to give you a solid understanding of what Docker images are, how to perform basic operations, and how they work under-the-hood.

We’ll see how to build new images with our own applications inside of them in a later chapter.

We’ll split this chapter into the usual three parts:

• The TLDR
• The deep dive
• The commands

Docker images - The TLDR

A Docker image is a unit of packaging that contains everything required for an application to run. This includes; application code, application dependencies, and OS constructs. If you have an application’s Docker image, the only other thing you need to run that application is a computer running Docker.

If you’re a ...