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

Summary

In this chapter, we learned how to manage a full migration from Docker to Podman.

We covered how to migrate images and create command aliases and we inspected the command compatibility matrix. Here, we provided a detailed overview of the different behaviors of specific commands and the different commands that are implemented in the two container engines – that is, Docker and Podman.

Then, we learned how to migrate Docker Compose by illustrating native Podman 3.0 support for the docker-compose command and the podman-compose alternative utility.

In the next and final chapter of this book, we will learn how to interact with Systemd by generating custom service units and turning containers into services that are started automatically inside the host. Then, we'll look at Kubernetes-oriented orchestration, where we will learn how to generate Kubernetes resources from running containers and pods and run them in Podman or Kubernetes natively.