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

Launching your first job

Now, let's discover another Kubernetes resource that is derived from Pods: the Job resource. In Kubernetes, a computing resource is a Pod, and everything else is just an intermediate resource that manipulates Pods.

This is the case for the Job object, which is an object that will create one or multiple Pods to complete a specific computing task, such as running a Linux command.

What are jobs?

A job is another kind of resource that's exposed by the Kubernetes API. In the end, a job will create one or multiple Pods to execute a command defined by you. That's how jobs work: they launch Pods. You have to understand the relationship between the two: jobs are not independent of Pods, and they would be useless without Pods. In the end, the two things they are capable of are launching Pods and managing them. Jobs are meant to handle a certain task and then exit. Here are some examples of typical use cases for a Kubernetes job:

  • Taking...