Certified Kubernetes Administrator (CKA) Exam Guide: Validate your knowledge of Kubernetes and implement it in a real-life production environment

by Alessandro Vozza, Brendan Burns, Mark Whitby, Melony QIN

Length: 322 pages
Edition: 1
Language: English
Publisher: Packt Publishing
Publication Date: 2022-11-04
ISBN-10: 1803238267
ISBN-13: 9781803238265
Sales Rank: #1189635 (See Top 100 Books)

Develop a deep understanding of Kubernetes and the cloud native ecosystem, and pass the CKA exam with confidence with this end-to-end study guide

Key Features

Get to grips with the core concepts of Kubernetes API primitives
Deploy, configure, manage, and troubleshoot Kubernetes clusters
Cement your credibility in the job market by becoming a Certified Kubernetes Administrator

Book Description

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.

What you will learn

Understand the fundamentals of Kubernetes and its tools
Get hands-on experience in installing and configuring Kubernetes clusters
Manage Kubernetes clusters and deployed workloads with ease
Get up and running with Kubernetes networking and storage
Manage the security of applications deployed on Kubernetes
Find out how to monitor, log, and troubleshoot Kubernetes clusters and apps among others

Who this book is for

This book is for application developers, DevOps engineers, data engineers, and cloud architects who want to pass the CKA exam and certify their Kubernetes Administrator skills in the market. Basic knowledge of Kubernetes is recommended to get the most out of this book.

Certified Kubernetes Administrator (CKA) Exam Guide
Foreword
Note from the author
Contributors
About the author
About the reviewers
Preface
    Who this book is for
    What this book covers
    To get the most out of this book
    Download the color images
    Conventions used
    Get in touch
    Share Your Thoughts
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 
    Chapter 2 – Installing and Configuring Kubernetes Clusters
        Scenario 1 
        Scenario 2 
        Scenario 3 (optional)
    Chapter 3 – Maintaining Kubernetes Clusters
        Scenario 1
        Scenario 2
        Scenario 3
        Scenario 4
    Chapter 4 – Application scheduling and lifecycle management
        Scenario 1
        Scenario 2
        Scenario 3
        Scenario 4
        Scenario 5
    Chapter 5 – Demystifying Kubernetes Storage
        Scenario 1
        Scenario 2
    Chapter 6 – Securing Kubernetes
        Scenario 1
        Scenario 2
        Scenario 3 
    Chapter 7 – Demystifying Kubernetes networking
        Scenario 1 
        Scenario 2
        Scenario 3
        Scenario 4
        Scenario 5
        Scenario 6
    Chapter 8 – Monitoring and logging Kubernetes Clusters and Applications
        Scenario 1 
Index
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