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

Using Docker Compose with Podman

When it was first released, Docker quickly gained consensus thanks to its intuitive approach to container management. Along with the main container engine solution, another great feature was introduced to help users orchestrate multiple containers on a single host: Docker Compose.

The idea behind Compose is quite simple – it's a tool that can be used to orchestrate multi-container applications that are supposed to interact together on a single host and configured with a declarative file in YAML format. All the applications that are executed in a Compose stack are defined as services that can communicate with the other containers in the stack with a transparent name resolution.

The configuration file is named docker-compose.yaml and has a simple syntax where one or more services and related volumes are created and started.

Development teams can benefit from the stack's automation to quickly test applications on a single host...