Docker Deep Dive - Second Edition

6: Images

In this chapter we’ll dive deep into Docker images. The aim 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 for our own applications 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

Image, Docker image, container image, and OCI image all mean the same thing. We’ll use the terms interchangeably.

A container image is read-only package that contains everything you need to run an application. It includes application code, application dependencies, a minimal set of OS constructs, and metadata. A single image can be used to start one or ...