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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Exploring the existing Namespaces

Now that we know that our cluster has multiple Namespaces, let's explore them a bit.

We can list all the Namespaces through the kubectl get namespaces command. As with the most of the other Kubernetes objects and resources, we can also use a shortcut ns instead of the full name.

kubectl get ns  

The output is as follows:

NAME          STATUS    AGE
default       Active    3m
kube-public   Active    3m
kube-system   Active    3m  

We can see that three Namespaces were set up automatically when we created the Minikube cluster.

The default Namespace is the one we used all this time. If we do not specify otherwise, all the kubectl commands will operate against the objects in the default Namespace. That's where our go-demo-2 application is running. Even though we were not aware of its existence, we now know that's where the objects we...