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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Creating Services through declarative syntax

We can accomplish a similar result as the one using kubectl expose through the svc/go-demo-2-svc.yml specification.

cat svc/go-demo-2-svc.yml  

The output is as follows:

apiVersion: v1
kind: Service
  name: go-demo-2
  type: NodePort
  - port: 28017
    nodePort: 30001
    protocol: TCP
    type: backend
    service: go-demo-2  

You should be familiar with the meaning of apiVersion, kind, and metadata, so we'll jump straight into the spec section. Since we already explored some of the options through the kubectl expose command, the spec should be relatively easy to grasp.

The type of the Service is set to NodePort meaning that the ports will be available both within the cluster as well as from outside by sending requests to any of the nodes.

The ports section specifies that the requests should...