Book Image

The Kubernetes Bible

By : Nassim Kebbani, Piotr Tylenda, Russ McKendrick
4 (3)
Book Image

The Kubernetes Bible

4 (3)
By: Nassim Kebbani, Piotr Tylenda, Russ McKendrick

Overview of this book

With its broad adoption across various industries, Kubernetes is helping engineers with the orchestration and automation of container deployments on a large scale, making it the leading container orchestration system and the most popular choice for running containerized applications. This Kubernetes book starts with an introduction to Kubernetes and containerization, covering the setup of your local development environment and the roles of the most important Kubernetes components. Along with covering the core concepts necessary to make the most of your infrastructure, this book will also help you get acquainted with the fundamentals of Kubernetes. As you advance, you'll learn how to manage Kubernetes clusters on cloud platforms, such as Amazon Web Services (AWS), Microsoft Azure, and Google Cloud Platform (GCP), and develop and deploy real-world applications in Kubernetes using practical examples. Additionally, you'll get to grips with managing microservices along with best practices. By the end of this book, you'll be equipped with battle-tested knowledge of advanced Kubernetes topics, such as scheduling of Pods and managing incoming traffic to the cluster, and be ready to work with Kubernetes on cloud platforms.
Table of Contents (28 chapters)
1
Section 1: Introducing Kubernetes
5
Section 2: Diving into Kubernetes Core Concepts
12
Section 3: Using Managed Pods with Controllers
17
Section 4: Deploying Kubernetes on the Cloud
21
Section 5: Advanced Kubernetes

Managing sensitive configuration with the Secret object

The Secret object is a resource that allows you to configure applications running on Kubernetes. Secrets are extremely similar to ConfigMaps and can be used together. The difference is that Secrets are encoded and intended to host sensitive data such as passwords, tokens, or private API keys, while ConfigMaps are intended to host non-sensitive configuration data. Other than that, Secrets and ConfigMaps mostly behave the same.

Let's start by discovering how to list the Secrets that are available in your Kubernetes cluster.

Listing Secrets

Like any other Kubernetes resource, you can list secrets using the kubectl get command. The resource identifier is a secret here:

$ kubectl get secret 

Just like with ConfigMaps, the DATA column tells you the number of sensitive parameters that have been hashed and saved in your secret.

The --from-literal flag can be used to fill a Secret object at creation time, the same...