This chapter covers:
– Scope and Objective of this Cookbook
In this part, we’ll learn how to use various tools to put your application in a container. Assuming we have an online microservice called auth-app, which handles authorization. We wrote this microservice in Rust. We will begin with Docker, then move on to Podman, and finally, Colima. Also, we will modify our containerized application step by step for the better.
Containerizing with Docker
To start with Docker, you need to have Docker Desktop installed. Use [official website] (https://docs.docker.com/engine/install/) to get it done, then check the Docker version by using this command:
– Why This Book? The Purpose Unveiled
– What You Will Learn
– Which Tasks Does Kubernetes Solve
– The Role of Kubernetes
“The magician’s power comes from being the only one that understands how something works. Learn how it works and they won’t be able to trick you.”
– Kelsey Hightower, ex-Google Cloud’s Principal Developer Advocate
In an era where the IT landscape is rapidly evolving, cloud-native architectures have emerged as the new standard for developing applications. At the heart of this transformation is Kubernetes, a platform that, much like Linux in its heyday, has become the foundational layer upon which countless projects are built. Kubernetes is not merely another tool in the developer’s arsenal; it represents an entire ecosystem teeming with plugins, addons, and tools designed to foster the creation of reliable, scalable, and secure systems. However, the complexity of Kubernetes means that a deep understanding of its inner workings is crucial. Without this knowledge, there’s a tangible risk of not just failure but significant financial and temporal losses.
This book is crafted to demystify Kubernetes, guiding you through its practical application in real-world scenarios while highlighting common pitfalls and how to sidestep them. Our goal is to arm you with the knowledge to not only prevent your company from facing catastrophic failures due to common missteps but also to provide insights into optimizing your Kubernetes infrastructure for both resource management and cost efficiency.
Why This Book? The Purpose Unveiled
If you’re contemplating migrating your projects to Kubernetes or eager to understand how to leverage this technology effectively in the real world, this book is your compass.
The journey to Kubernetes mastery is fraught with questions and challenges:
1. The Learning Curve: While initiating a simple demo may seem straightforward, the operational and troubleshooting aspects of Kubernetes are anything but. Real-world guidance and insights into potential hurdles are invaluable.
2. Navigational Challenges: The Kubernetes ecosystem is vast, offering numerous paths for teams. Determining the most effective route without wasting resources is a common quandary.
3. Resource Optimization: How can you ensure your Kubernetes clusters are as resource-efficient as possible?
4. Avoiding Pitfalls: The fear of “breaking the company” with Kubernetes is real. How do you use it safely?
5. The Infrastructure Puzzle: Kubernetes is not a standalone solution; it requires a suite of additional modules and infrastructure. The necessity of these components often catches teams off guard.
6. Production Challenges: Managing a live production cluster presents its own set of challenges. How do you address these effectively?
