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

Chapter 14: Interacting with systemd and Kubernetes

In the previous chapters, we learned how to initialize and manage containers, starting with simple concepts and arriving at advanced ones. Containers represent a key technology for application development in the latest Linux operating system releases. For this reason, containers are only the starting point for advanced developers and system administrators. Once this technology becomes widely adopted in an enterprise company or a technical project, the next step will be to integrate it with the base operating system and with -system orchestration platforms.

In this chapter, we're going to cover the following main topics: 

  • Setting up the prerequisites for the host operating system
  • Creating the systemd unit files
  • Managing container-based systemd services
  • Generating Kubernetes YAML resources
  • Running Kubernetes resource files in Podman
  • Testing the results in Kubernetes