Qin Certified Kubernetes Administrator (CKA) Exam Guide

Validate your knowledge of Kubernetes and implement it in a real-life production environment
1. Auflage 2024
ISBN: 978-1-80324-995-7
Verlag: De Gruyter
Format: EPUB
Kopierschutz: 0 - No protection

E-Book, Englisch, 322 Seiten

Kubernetes is the most popular container orchestration tool in the industry. The Kubernetes Administrator certification will help you establish your credibility and enable you to efficiently support the business growth of individual organizations with the help of this open source platform.
The book begins by introducing you to Kubernetes architecture and the core concepts of Kubernetes. You'll then get to grips with the main Kubernetes API primitives, before diving into cluster installation, configuration, and management. Moving ahead, you'll explore different approaches while maintaining the Kubernetes cluster, perform upgrades for the Kubernetes cluster, as well as backup and restore etcd. As you advance, you'll deploy and manage workloads on Kubernetes and work with storage for Kubernetes stateful workloads with the help of practical scenarios. You'll also delve into managing the security of Kubernetes applications and understand how different components in Kubernetes communicate with each other and with other applications. The concluding chapters will show you how to troubleshoot cluster- and application-level logging and monitoring, cluster components, and applications in Kubernetes.
By the end of this Kubernetes book, you'll be fully prepared to pass the CKA exam and gain practical knowledge that can be applied in your day-to-day work.

Autoren/Hrsg.

Qin, Mélony

Weitere Mitwirkende

Burns, Brendan

Whitby, Mark

Vozza, Alessandro

Fachgebiete

• Mathematik | Informatik EDV | Informatik EDV & Informatik Allgemein EDV: Zertifizierung
• Mathematik | Informatik EDV | Informatik Computerkommunikation & -vernetzung Verteilte Systeme (Netzwerke)
• Mathematik | Informatik EDV | Informatik Technische Informatik Systemverwaltung & Management

Inhaltsverzeichnis

Table of Contents - Kubernetes Overview
- Installing and configuring Kubernetes Clusters
- Maintaining Kubernetes clusters
- Application scheduling and lifecycle management
- Demystifying Kubernetes Storage
- Securing Kubernetes
- Demystifying Kubernetes networking
- Monitoring and logging Kubernetes Clusters and Applications
- Troubleshooting cluster components and applications
- Troubleshooting security and networking

Leseproben

Table of Contents

Preface

Part 1: Cluster Architecture, Installation, and Configuration

1

Kubernetes Overview

CKA exam overview

What to expect in your CKA exam

CKA exam tips and tricks

Cluster architecture and components

Kubernetes core concepts

Containerized workloads

Container images

Container registry

Container runtimes

Kubernetes basic workflow

Kubernetes plugin model

Kubernetes API primitives

Sharing a cluster with namespaces

Kubernetes in-market distribution and ecosystems

Upstream vanilla Kubernetes

Managed Kubernetes

Kubernetes ecosystems

Summary

2

Installing and Configuring Kubernetes Clusters

Technical requirements

Hands-on Kubernetes tooling

Core tools

Deployment tools

Other tools

Installing and configuring a Kubernetes cluster

Prerequisites for installing a Kubernetes cluster

Using minikube to set up a single node Kubernetes cluster

Using kubeadm to install a basic Kubernetes cluster

Setting up a highly available cluster with kubeadm

Summary

Mock CKA scenario-based practice test

Scenario 1:

Scenario 2:

Scenario 3 (optional):

FAQs

3

Maintaining Kubernetes Clusters

Demystifying Kubernetes cluster maintenance

Upgrading a Kubernetes cluster using kubeadm

Upgrading the master node

Upgrading the worker node

Working with etcd

Exploring the ETCD cluster pod

Listing etcd cluster members

Checking the etcd cluster status

Installing etcd

Backing up etcd

Restoring etcd

Summary

Mock CKA scenario-based practice test

Scenario 1

Scenario 2

Scenario 3

Scenario 4

FAQs

Part 2: Managing Kubernetes

4

Application Scheduling and Lifecycle Management

Technical requirements

The basics of Kubernetes workloads

Imperative management versus declarative management

Understanding pods

Deploying and managing applications

Deploying applications

Performing rolling updates and rollbacks

Rolling updates with kubectl

Rollback

Scaling applications

ReplicaSets

Workload scheduling

Understanding namespaces

Labels, node selectors, and annotations

Node affinity and anti-affinity

Taints and tolerations

Resource management

Configuring applications

Manifest management with kustomize

Common package management and templating with Helm

Summary

Mock CKA scenario-based practice test

Scenario 1

Scenario 2

Scenario 3

Scenario 4

Scenario 5

FAQs

5

Demystifying Kubernetes Storage

Technical requirements

Stateful versus stateless workloads

Kubernetes volumes

Ephemeral storage

Persistent storage

Cracking stateful applications in Kubernetes

Configuring an application with mounted storage

Configuring an application with persistent storage

Summary

Mock CKA scenario-based practice test

Scenario 1

Scenario 2

FAQs

6

Securing Kubernetes

Technical requirements

Securing Kubernetes in layers

Kubernetes authentication and authorization

Service accounts versus user accounts

Kubernetes service accounts

Organizing the cluster access using kubeconfig

Configuring access to multiple clusters

Kubernetes authorization

Kubernetes RBAC

Managing the security of Kubernetes applications

Summary

Mock CKA scenario-based practice test

Scenario 1

Scenario 2

Scenario 3

FAQs

7

Demystifying Kubernetes Networking

Technical requirements

Understanding the Kubernetes networking model

Container-to-container communication

Pod-to-pod communication

Pod-to-service and external-to-service communications

Node-to-node communication

Choosing an appropriate Container Network Interface plugin

CNI networking in Kubernetes

Decision metrics

Configuring Ingress controllers and Ingress resources

How Ingress and an Ingress controller works

Using multiple Ingress controllers

Work with Ingress resources

Ingress annotations and rewrite-target

Configuring and leveraging CoreDNS

Check whether the CoreDNS server is up and running

Pod IPs and DNS hostnames

Service IPs and DNS hostnames

Summary

Mock CKA scenario-based practice test

Scenario 1

Scenario 2

Scenario 3

Scenario 4

Scenario 5

Scenario 6

FAQs

Part 3: Troubleshooting

8

Monitoring and Logging Kubernetes Clusters and Applications

Technical requirements

Monitoring on a cluster node

Checking whether Metrics Server is installed

Installing Metrics Server in your current Kubernetes cluster

Checking out CPU/memory metrics

Monitoring applications on a Kubernetes cluster

Monitoring the resource usage of an application

Checking application details

Monitoring cluster events

Managing logs at the cluster node and Pod levels

Cluster-level logging

Checking out the node details

Checking the node status

Managing container stdout and stderr logs

Summary

Mock CKA scenario-based practice test

Scenario 1

FAQs

9

Troubleshooting Cluster Components and Applications

Technical requirements

General practices in Kubernetes troubleshooting

Troubleshooting cluster components

Inspecting the cluster

Inspecting the node

Troubleshooting applications

Getting a high-level view

Inspecting namespace events

Troubleshooting failing pods

Troubleshooting init containers

Summary

FAQs

10

Troubleshooting Security and Networking

Technical requirements

Troubleshooting RBAC failures

Initiating a minikube cluster

Managing a minikube cluster

Troubleshooting networking

Troubleshooting a Kubernetes DNS server

Troubleshooting a service in Kubernetes

Get a shell for troubleshooting

Summary

FAQs

Appendix - Mock CKA scenario-based practice test resolutions

– Installing and Configuring Kubernetes Clusters

Scenario 1

Scenario 2

Scenario 3 (optional)

– Maintaining Kubernetes Clusters

Scenario 1

Scenario 2

Scenario 3

Scenario 4

– Application scheduling and lifecycle management

Scenario 1

Scenario 2

Scenario 3

Scenario...

Über Autor(innen)

Qin Mélony :

Mélony Y. QIN, also known as CloudMelon, is the founder of CloudMelon Vis, a tech media and educational platform for technopreneurs in the cloud-native and serverless space, and a former product manager at Microsoft. With a passion for cloud-native technologies, OSS, DevOps, Kubernetes, serverless, data, and AI, Mélony has authored multiple books, including the Certified Kubernetes Administrator (CKA) Exam Guide, the Kubernetes Workshop, and Microsoft Azure Infrastructure, all published by Packt Publishing. Mélony is a member of the Association for Computing Machinery (ACM) and the Project Management Institute (PMI), leveraging her extensive experience with diverse cloud technologies to drive innovation in the cloud-native, serverless, and generative AI space. She runs the CloudMelonVis YouTube channel and Cloud-Native Innovators newsletter, read by professionals from top tech companies such as Microsoft, Google, Amazon, Dell, and Carrefour.