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Getting Started with Kubernetes

Getting Started with Kubernetes

By : Jonathan Baier, White
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Getting Started with Kubernetes

Getting Started with Kubernetes

By: Jonathan Baier, White

Overview of this book

Kubernetes has continued to grow and achieve broad adoption across various industries, helping you to orchestrate and automate container deployments on a massive scale. Based on the recent release of Kubernetes 1.12, Getting Started with Kubernetes gives you a complete understanding of how to install a Kubernetes cluster. The book focuses on core Kubernetes constructs, such as pods, services, replica sets, replication controllers, and labels. You will understand cluster-level networking in Kubernetes, and learn to set up external access to applications running in the cluster. As you make your way through the book, you'll understand how to manage deployments and perform updates with minimal downtime. In addition to this, you will explore operational aspects of Kubernetes , such as monitoring and logging, later moving on to advanced concepts such as container security and cluster federation. You'll get to grips with integrating your build pipeline and deployments within a Kubernetes cluster, and be able to understand and interact with open source projects. In the concluding chapters, you'll orchestrate updates behind the scenes, avoid downtime on your cluster, and deal with underlying cloud provider instability within your cluster. By the end of this book, you'll have a complete understanding of the Kubernetes platform and will start deploying applications on it.
Table of Contents (18 chapters)
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Helm and Minikube


Let's try setting up some CI/CD with other tools, so we can experiment with the newest offerings in the Kubernetes ecosystem. First, let's explore how easy it is to install Jenkins with Helm.

First, open the Minikube dashboard so you can see what happens when we install various things. Do this with the following command:

$ minikube dashboard

Let's create a namespace for the Jenkins environment, as follows:

$ kubectl get namespaces
NAME          STATUS AGE
default       Active 3d
kube-public   Active 3d
kube-system   Active 3d

Now, let's create a template:

$ mkdir -p ~/gsw-k8s-helm && cd ~/gsw-k8s-helm
$ cat <<K8s >> namespace-jenkins.yaml
apiVersion: v1
kind: Namespace
metadata:
 name: gsw-k8s-jenkins
K8s

Now, you can create the namespace as follows:

kubectl create -f namespace-jenkins.yaml
namespace "gsw-k8s-jenkins" created

There are two ways to verify that it was actually created. First, you can take a look at the dashboard with the minikube dashboard command...

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