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

Cloud-based and on-premise container registries

As we introduced in the previous sections, the OCI defined a standard to adhere to for container registries. This initiative allowed the rise of many other container registries apart from the initial Docker Registry and its online service, Docker Hub.

We can group the available container registries into two main categories:

  • Cloud-based container registries
  • On-premise container registries

Let's see these two categories in detail in the following subsections.

On-premise container registries

On-premise container registries are often used for creating a private repository for enterprise purposes. The main use cases include the following:

  • Distributing images in a private or isolated network
  • Deploying a new container image at a large scale over several machines
  • Keeping any sensitive data in our own data center
  • Improving the speed of pulling and pushing images using an internal network
  • ...