Book Image

Hands-On Kubernetes on Azure - Second Edition

By : Nills Franssens, Shivakumar Gopalakrishnan, Gunther Lenz
Book Image

Hands-On Kubernetes on Azure - Second Edition

By: Nills Franssens, Shivakumar Gopalakrishnan, Gunther Lenz

Overview of this book

From managing versioning efficiently to improving security and portability, technologies such as Kubernetes and Docker have greatly helped cloud deployments and application development. Starting with an introduction to Docker, Kubernetes, and Azure Kubernetes Service (AKS), this book will guide you through deploying an AKS cluster in different ways. You’ll then explore the Azure portal by deploying a sample guestbook application on AKS and installing complex Kubernetes apps using Helm. With the help of real-world examples, you'll also get to grips with scaling your application and cluster. As you advance, you'll understand how to overcome common challenges in AKS and secure your application with HTTPS and Azure AD (Active Directory). Finally, you’ll explore serverless functions such as HTTP triggered Azure functions and queue triggered functions. By the end of this Kubernetes book, you’ll be well-versed with the fundamentals of Azure Kubernetes Service and be able to deploy containerized workloads on Microsoft Azure with minimal management overhead.
Table of Contents (16 chapters)
1
Section 1: The Basics
4
Section 2: Deploying on AKS
10
Section 3: Leveraging advanced Azure PaaS services
15
Index

Metrics reported by Kubernetes

Kubernetes reports multiple metrics. In this section, we'll first use a number of kubectl commands to get these metrics. Afterward, we'll look into Azure Monitor for containers to see how Azure helps with container monitoring.

Node status and consumption

The nodes in your Kubernetes are the servers running your application. Kubernetes will schedule Pods to different nodes in the cluster. You need to monitor the status of your nodes to ensure that the nodes themselves are healthy and that the nodes have enough resources to run new applications.

Run the following command to get information about the nodes on the cluster:

kubectl get nodes

The preceding command lists their name, status, and age:

Output for the kubectl get nodes command listing the name, status, and age of the nodes.
Figure 7.22: There are two nodes in this cluster

You can get more information by passing the -o wide option:

kubectl get -o wide nodes

The output lists the underlying OS-IMAGE and INTERNAL-IP, and other...