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 13: Docker Migration Tips and Tricks

Every technology has a pioneer company, project, and product that, once created and announced, becomes a real game-changer that allowed its base concepts to spread. For containers, this was Docker.

As we learned in Chapter 1, Introduction to Container Technology, Docker provided a new approach and great ideas to leveraging existing technologies and creating brand new ones. After a few years, it became the most used technology for containers.

But as usually happens for open source projects, the community and the enterprise started looking for improvements, new architectures, and different implementations. That's where Podman found a place to grow and leverage the standardization that's offered by the Open Container Initiative (OCI).

Docker was (and still is) the most used container technology. For this reason, in this chapter, we are going to provide some tips and tricks regarding handling the migration process. We will...