Docker — Three Ways To Create Container Images and Their Use Cases
Creating container images with examples in different ways and their use cases
Published in
6 min readMay 1, 2019
Creating efficient and small images are very important in docker. In this article, we will look at the ways to create them and their use cases
- What are Images
- What is a copy-on-write strategy?
- What are we building
- Three ways of Building Images
- Use cases
- Conclusion
What are images
The whole operating system of Linux is a filesystem. So, Images are nothing but a big tarball of a layered filesystem. If you look at the below diagram, Image is built with a bunch of immutable layers. Each layer consists of files and folders and each layer is built only with the changes corresponding to the previous layer.
The first layer is called a base layer and each layer is immutable that means once created, we can’t change the file system. It uses a copy-on-write strategy.
