Book Image

Mastering Ubuntu Server - Fourth Edition

By : Jay LaCroix
4.8 (5)
Book Image

Mastering Ubuntu Server - Fourth Edition

4.8 (5)
By: Jay LaCroix

Overview of this book

Ubuntu Server is taking the server world by storm - and for a good reason! The server-focused spin of Ubuntu is a stable, flexible, and powerful enterprise-class distribution of Linux with a focus on running servers both small and large. Mastering Ubuntu Server is a book that will teach you everything you need to know in order to manage real Ubuntu-based servers in actual production deployments. This book will take you from initial installation to deploying production-ready solutions to empower your small office network, or even a full data center. You'll see examples of running an Ubuntu Server in the cloud, be walked through set up popular applications (such as Nextcloud), host your own websites, and deploy network resources such as DHCP, DNS, and others. You’ll also see how to containerize applications via LXD to maximize efficiency and learn how to build Kubernetes clusters. This new fourth edition updates the popular book to cover Ubuntu 22.04 LTS, which takes advantage of the latest in Linux-based technologies. By the end of this Ubuntu book, you will have gained all the knowledge you need in order to work on real-life Ubuntu Server deployments and become an expert Ubuntu Server administrator who is well versed in its feature set.
Table of Contents (26 chapters)
24
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25
Index

Deploying containers via Kubernetes

Now it’s time to see our work pay off, and we can successfully use the cluster we’ve created. At this point, you should have either set up MicroK8s, or manually created a cluster as we’ve done in the previous section. In either case, the result is the same: we have a cluster available that we can use to deploy containers.

Keep in mind that if you’re using MicroK8s, you might need to prepend microk8s in front of kubectl commands, depending on how you set up MicroK8s. I’ll leave it up to you to add microk8s to the front of such commands as you go along, if you’re using MicroK8s and you don’t have it set up to simplify microk8s kubectl to kubectl.

Kubernetes utilizes files created in the YAML format to receive instructions. Does that sound familiar? In Chapter 15, Automating Server Configuration with Ansible, we worked with YAML files as that’s the format that Ansible playbooks are written...