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Introduction to DevOps with Kubernetes

You're reading from   Introduction to DevOps with Kubernetes Build scalable cloud-native applications using DevOps patterns created with Kubernetes

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Product type Paperback
Published in May 2019
Publisher
ISBN-13 9781789808285
Length 374 pages
Edition 1st Edition
Languages
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Authors (2):
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Süleyman Akbaş Süleyman Akbaş
Author Profile Icon Süleyman Akbaş
Süleyman Akbaş
Onur Yılmaz Onur Yılmaz
Author Profile Icon Onur Yılmaz
Onur Yılmaz
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Toc

Table of Contents (11) Chapters Close

Preface 1. Chapter 1: Introduction to DevOps FREE CHAPTER 2. Chapter 2: Introduction to Microservices and Containers 3. Chapter 3: Introduction to Kubernetes 4. Chapter 4: Creating a Kubernetes Cluster 5. Chapter 5: Deploy an Application to Kubernetes 6. Chapter 6: Configuration and Storage Management in Kubernetes 7. Chapter 7: Updating and Scaling an Application in Kubernetes 8. Chapter 8: Troubleshooting Applications in Kubernetes 9. Chapter 9: Monitoring Applications in Kubernetes Appendix

Troubleshooting Applications in Kubernetes

To be able to troubleshoot applications efficiently, you need to understand some key concepts in Kubernetes. This will light up the way to ease the process of figuring out and solving issues. As one of these concepts, we explain the Pod life cycle in the next section.

Pod Life Cycle

In Kubernetes, a Pod goes through many different stages. They are controlled either by the creator of the Pod object or by the Kubernetes controller. In the lifetime of a Pod, it is never destroyed unless that is explicitly requested.

Pod Status

Every Pod object has a status field that shows the life cycle events of the Pod. It consists of many subfields for us to understand what the current health status of the Pod is.

Here's an example of what a Pod status includes:

status:
  conditions:
  - lastProbeTime: null
   
//[...]
Events:
    FirstSeen	LastSeen	Count	From			        SubobjectPath	Type		Reason			    Message
    ---------	-------...
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