Book Image

The DevOps 2.3 Toolkit

By : Viktor Farcic
Book Image

The DevOps 2.3 Toolkit

By: Viktor Farcic

Overview of this book

Building on The DevOps 2.0 Toolkit, The DevOps 2.1 Toolkit: Docker Swarm, and The DevOps 2.2 Toolkit: Self-Sufficient Docker Clusters, Viktor Farcic brings his latest exploration of the DevOps Toolkit as he takes you on a journey to explore the features of Kubernetes. The DevOps 2.3 Toolkit: Kubernetes is a book in the series that helps you build a full DevOps Toolkit. This book in the series looks at Kubernetes, the tool designed to, among other roles, make it easier in the creation and deployment of highly available and fault-tolerant applications at scale, with zero downtime. Within this book, Viktor will cover a wide range of emerging topics, including what exactly Kubernetes is, how to use both first and third-party add-ons for projects, and how to get the skills to be able to call yourself a “Kubernetes ninja.” Work with Viktor and dive into the creation and exploration of Kubernetes with a series of hands-on guides.
Table of Contents (18 chapters)
16
The End
17
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Scaling Deployments

There are quite a few different ways we can scale Deployments. Everything we do in this section is not unique to Deployments and can be applied to any Controller, like ReplicaSet, and those we did not yet explore.

If we decide that the number of replicas changes with relatively low frequency or that Deployments are performed manually, the best way to scale is to write a new YAML file or, even better, modify the existing one. Assuming that we store YAML files in a code repository, by updating existing files we have a documented and reproducible definition of the objects running inside a cluster.

We already performed scaling when we applied the definition from the go-demo-2-scaled.yml. We'll do something similar, but with Deployments.

Let's take a look at deploy/go-demo-2-scaled.yml.

cat deploy/go-demo-2-scaled.yml  

We won't display the contents...