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

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

Chapter 10 – Troubleshooting Kubernetes

One of the strengths of Kubernetes is the ability to scale the cluster easily by adding nodes or changing Pod placement by using controls such as taints and tolerations. In addition, Pod restarts can result in completely different IPs for the same application. This means that both the compute and network topologies can be ever-changing.
The kubelet is typically run as a Linux service with systemd, with control available using systemctl and logs in journalctl.
There are a few different methodologies to use, but generally, you would want to check whether all Nodes are ready and schedulable; whether there are any Pod Placement Controls precluding scheduling of the Pod; and whether there is any dependent storage, ConfigMaps, or secrets that do not exist.