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

Integrating Buildah in custom builders

As we saw in the previous section of this chapter, Buildah is a key component of Podman's container ecosystem. Buildah is a dynamic and flexible tool that can be adapted to different scenarios to build brand-new containers. It has several options and configurations available, but our exploration is not yet finished.

Podman and all the projects developed around it have been built with extensibility in mind, making every programmable interface available to be reused from the outside world.

Podman, for example, inherits Buildah capabilities for building brand-new containers through the podman build command; with the same principle, we can embed Buildah interfaces and its engine in our custom builder.

Let's see how to build a custom builder in the Go language; we will see that the process is pretty straightforward, because Podman, Buildah, and many other projects in this ecosystem are actually written in the Go language.

Including...