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

Preparing our environment

Buildah is available on different distributions and can be installed using the respective package managers. This section provides a non-exhaustive list of installation examples on the major distributions. For the sake of clarity, it is important to reiterate that the book lab environments were all based on Fedora 34:

  • Fedora: To install Buildah on Fedora, run the following dnf command:
    $ sudo dnf -y install buildah
  • Debian: To install Buildah on Debian Bullseye or later, run the following apt-get commands:
    $ sudo apt-get update
    $ sudo apt-get -y install buildah
  • CentOS: To install Buildah on CentOS, run the following yum command:
    $ sudo yum install -y buildah
  • RHEL8: To install Buildah on RHEL8, run the following yum module commands:
    $ sudo yum module enable -y container-tools:1.0
    $ sudo yum module install -y buildah
  • RHEL7: To install Buildah on RHEL7, enable the rhel-7-server-extras-rpms repository and install with yum:
    $ sudo subscription...