Book Image

Docker Cookbook - Second Edition

By : Ken Cochrane, Jeeva S. Chelladhurai, Neependra K Khare
2 (1)
Book Image

Docker Cookbook - Second Edition

2 (1)
By: Ken Cochrane, Jeeva S. Chelladhurai, Neependra K Khare

Overview of this book

Docker is an open source tool used for creating, deploying, and running applications using containers. With more than 100 self-contained tutorials, this book examines common pain points and best practices for developers building distributed applications with Docker. Each recipe in this book addresses a specific problem and offers a proven, best practice solution with insights into how it works, so that you can modify the code and configuration files to suit your needs. The Docker Cookbook begins by guiding you in setting up Docker in different environments and explains how to work with its containers and images. You’ll understand Docker orchestration, networking, security, and hosting platforms for effective collaboration and efficient deployment. The book also covers tips and tricks and new Docker features that support a range of other cloud offerings. By the end of this book, you’ll be able to package and deploy end-to-end distributed applications with Docker and be well-versed with best practice solutions for common development problems.
Table of Contents (13 chapters)

Scaling up and down in Kubernetes cluster

In the previous section, we mentioned that a ReplicaSet ensures that the user-specified number of pod replicas is running at any given time. To manage replicas with the ReplicaSet, we have to define a configuration file with a replica count for a pod. This configuration can be changed at runtime.

Getting ready

Make sure that the Kubernetes setup is running, as described in the preceding recipe, and that you are in the Kubernetes directory, which was created with the preceding installation.

How to do it...

Follow these steps:

  1. Start...