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

Running Buildah inside a container

Podman and Buildah follow a fork/exec approach that makes them very easy to run inside a container, including rootless containers scenarios.

There are many use cases that imply the need for containerized builds. Nowadays, one of the most common adoption scenarios is the application build workflow running on top of a Kubernetes cluster.

Kubernetes is basically a container orchestrator that manages the scheduling of containers from a control plane over a set of worker nodes that run a container engine compatible with the Container Runtime Interface (CRI). Its design allows great flexibility in customizing networking, storage, and runtimes, and leads to the great flourishing of side projects that are now incubating or matured inside the Cloud Native Computing Foundation (CNCF).

Vanilla Kubernetes (which is the basic community release without any customization or add-ons) doesn't have any native build feature but offers the proper framework...