Book Image

Kubernetes - A Complete DevOps Cookbook

By : Murat Karslioglu
Book Image

Kubernetes - A Complete DevOps Cookbook

By: Murat Karslioglu

Overview of this book

Kubernetes is a popular open source orchestration platform for managing containers in a cluster environment. With this Kubernetes cookbook, you’ll learn how to implement Kubernetes using a recipe-based approach. The book will prepare you to create highly available Kubernetes clusters on multiple clouds such as Amazon Web Services (AWS), Google Cloud Platform (GCP), Azure, Alibaba, and on-premises data centers. Starting with recipes for installing and configuring Kubernetes instances, you’ll discover how to work with Kubernetes clients, services, and key metadata. You’ll then learn how to build continuous integration/continuous delivery (CI/CD) pipelines for your applications, and understand various methods to manage containers. As you advance, you’ll delve into Kubernetes' integration with Docker and Jenkins, and even perform a batch process and configure data volumes. You’ll get to grips with methods for scaling, security, monitoring, logging, and troubleshooting. Additionally, this book will take you through the latest updates in Kubernetes, including volume snapshots, creating high availability clusters with kops, running workload operators, new inclusions around kubectl and more. By the end of this book, you’ll have developed the skills required to implement Kubernetes in production and manage containers proficiently.
Table of Contents (12 chapters)

Troubleshooting storage issues

In this section, you will learn how to solve the most common storage issues associated with Kubernetes. After following the recipes in this chapter, you will gain the basic skills required to troubleshoot persistent volumes stuck in pending or termination states.

Getting ready

Make sure that you have a Kubernetes cluster ready and kubectl configured to manage the cluster resources.

How to do it…

This section is sub-divided further into the following subsections to facilitate the process:

  • Persistent volumes in the pending state
  • A PV is stuck once a PVC has been deleted

Persistent volumes in the pending state

You have deployed an application, but both pods and persistent volume claims are stuck in the pending state, similar to the following:

$ kubectl get pvc
mysql-pv-claim Pending rook-ceph-block 28s

Let's perform the following steps to start troubleshooting:

  1. First, describe the PVC to...