You're reading from Cloud Native with Kubernetes Deploy, configure, and run modern cloud native applications on Kubernetes

Product type Paperback

Published in Jan 2021

Publisher Packt

ISBN-13 9781838823078

Length 446 pages

Edition 1st Edition

Tools

Jenkins

Concepts

Cloud Native

Author (1):

Alexander Raul

View More author details

Table of Contents (22) Chapters

Preface

1. Section 1: Setting Up Kubernetes

2. Chapter 1: Communicating with Kubernetes FREE CHAPTER

3. Chapter 2: Setting Up Your Kubernetes Cluster

4. Chapter 3: Running Application Containers on Kubernetes

5. Section 2: Configuring and Deploying Applications on Kubernetes

6. Chapter 4: Scaling and Deploying Your Application

7. Chapter 5: Services and Ingress – Communicating with the Outside World

8. Chapter 6: Kubernetes Application Configuration

9. Chapter 7: Storage on Kubernetes

10. Chapter 8: Pod Placement Controls

11. Section 3: Running Kubernetes in Production

12. Chapter 9: Observability on Kubernetes

13. Chapter 10: Troubleshooting Kubernetes

14. Chapter 11: Template Code Generation and CI/CD on Kubernetes

15. Chapter 12: Kubernetes Security and Compliance

16. Section 4: Extending Kubernetes

17. Chapter 13: Extending Kubernetes with CRDs

18. Chapter 14: Service Meshes and Serverless

19. Chapter 15: Stateful Workloads on Kubernetes

20. Assessments

21. Other Books You May Enjoy

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Troubleshooting applications on Kubernetes

A perfectly running Kubernetes cluster may still have application issues to debug. These could be due to bugs in the application itself, or due to misconfigurations in the Kubernetes resources that make up the application. As with troubleshooting the cluster, we will dive into these concepts by using a case study.

Case study 1 – Service not responding

We're going to break this section down into troubleshooting at various levels of the Kubernetes stack, starting with higher-level components, then ending with a deep dive into Pod and container debugging.

Let's assume that we have configured our application app-1 to respond to requests via a NodePort Service, on port 32688. The application listens on port 80.

We can try to access our application via a curl request on one of our Nodes. The command will look as follows: