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 11: Securing Containers

Security is becoming the hottest topic of current times. Enterprises and companies all over the world are making huge investments in security practices and tools that should help protect their systems from internal or external attacks.

As we saw in Chapter 1, Introduction to Container Technology, containers and their host systems can be considered a medium to execute and keep a target application running. Security should be applied to all levels of the service architecture, from the base infrastructure to the target application code, all while passing through the virtualization or containerization layer.

In this chapter, we will look at the best practices and tools that could help improve the overall security of our containerization layer. In particular, we're going to cover the following main topics:

  • Running rootless containers with Podman
  • Do not run containers with UID 0
  • Signing our container images
  • Customizing Linux...