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

Troubleshooting running containers

Troubleshooting containers is an important practice that we need experience with to solve common issues and investigate any bugs we may encounter on the container layer or in the application running inside our containers.

Starting from Chapter 3, Running the First Container, we started working with basic Podman commands for running and then inspecting containers on our host system. We saw how we can collect logs with the podman logs command, and we also learned how to use the information provided by the podman inspect command. Finally, we should also consider taking a look at the output of the useful podman system df command, which will report storage usage for our containers and images, and also the useful podman system info command, which will show useful information on the host where we are running Podman.

In general, we should always consider that the running container is just a process on the host system so we always have available all...