Book Image

Podman for DevOps

By : Alessandro Arrichiello, Gianni Salinetti
Book Image

Podman for DevOps

By: Alessandro Arrichiello, Gianni Salinetti

Overview of this book

As containers have become the new de facto standard for packaging applications and their dependencies, understanding how to implement, build, and manage them is now an essential skill for developers, system administrators, and SRE/operations teams. Podman and its companion tools Buildah and Skopeo make a great toolset to boost the development, execution, and management of containerized applications. Starting with the basic concepts of containerization and its underlying technology, this book will help you get your first container up and running with Podman. You'll explore the complete toolkit and go over the development of new containers, their lifecycle management, troubleshooting, and security aspects. Together with Podman, the book illustrates Buildah and Skopeo to complete the tools ecosystem and cover the complete workflow for building, releasing, and managing optimized container images. Podman for DevOps provides a comprehensive view of the full-stack container technology and its relationship with the operating system foundations, along with crucial topics such as networking, monitoring, and integration with systemd, docker-compose, and Kubernetes. By the end of this DevOps book, you'll have developed the skills needed to build and package your applications inside containers as well as to deploy, manage, and integrate them with system services.
Table of Contents (19 chapters)
1
Section 1: From Theory to Practice: Running Containers with Podman
7
Section 2: Building Containers from Scratch with Buildah
12
Section 3: Managing and Integrating Containers Securely

Chapter 2: Comparing Podman and Docker

As we learned from the previous chapter, container technology is not as new as we may think and therefore its implementation and architecture has been influenced over the years to reach its current status.

In this chapter, we’ll go through a bit of the history and the main architecture of Docker and Podman container engines, completing the picture with a side-by-side comparison to let readers with some Docker experience easily get on board and learn the main differences before going into a deep exploration of Podman.

If you don’t have much experience with Docker, you can easily jump to the next chapter and return to this one once you feel it is time to learn the differences between Podman and Docker container engines.

In this chapter, we’re going to cover the following main topics:

  • Docker container daemon architecture
  • Podman daemonless architecture
  • The main differences between Docker and Podman
  • ...