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 have completed a journey on container storage and Podman features offered to manipulate it. The material in this chapter is crucial to understanding how Podman manages both ephemeral and persistent data and provides best practices to users to manipulate their data.

In the first section, we learned why container storage matters and how it should be correctly managed both in single host and orchestrated, multi-host environments.

In the second section, we took a deep dive into container storage features and storage drivers, with a special focus on overlayfs.

In the third section, we learned how to copy files to and from a container. We also saw how changes could be committed to a new image.

The fourth section described the different possible scenarios of storage attached to a container, covering bind mounts, volumes, tmpfs, images, and devpts. This section was also a perfect fit to discuss SELinux interaction with storage management and see how...