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

Testing the results in Kubernetes

In this section, we want to import the multi-pod YAML file, which is enriched with the Services and PVC configurations, on Kubernetes.

To provide a repeatable environment, we will use minikube (with a lowercase m), a portable solution, to create an all-in-one Kubernetes cluster as the local infrastructure.

The minikube project aims to provide a local Kubernetes cluster on Linux, Windows, and macOS. It uses host virtualization to spin up a VM that runs the all-in-one cluster or containerization to create a control plane that runs inside a container. It also provides a large set of add-ons to extend cluster functionalities, such as ingress controllers, service meshes, registries, logging, and more.

Another widely adopted alternative to spinning up a local Kubernetes cluster is the Kubernetes in Docker (KinD) project, which is not described in this book. KinD runs a Kubernetes control plane inside a container that's driven by Docker or...