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)
The End
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Quick and dirty way to run Pods

Just as we can execute docker run to create containers, kubectl allows us to create Pods with a single command. For example, if we'd like to create a Pod with a Mongo database, the command is as follows.

kubectl run db --image mongo  

You'll notice that the output says that deployment "db" was created. Kubernetes runs more than a single Pod. It created a Deployment and a few other things. We won't go into all the details just yet. What matters, for now, is that we created a Pod. We can confirm that by listing all the Pods in the cluster:

kubectl get pods  

The output is as follows:

NAME                READY STATUS            RESTARTS AGE
db-59d5f5b96b-kch6p 0/1   ContainerCreating 0        1m  

We can see the name of the Pod, its readiness, the status, the number of times it restarted, and for how long it has existed (its...