book

Certified Kubernetes Administrator (CKA) Exam Guide

by Mélony Qin

November 2022

Intermediate to advanced

322 pages

6h 24m

English

Packt Publishing

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ForewordNote from the authorContributorsAbout the authorAbout the reviewers
Who this book is forWhat this book coversTo get the most out of this bookDownload the color imagesConventions usedGet in touchShare Your Thoughts
CKA exam overviewWhat to expect in your CKA exam CKA exam tips and tricks Cluster architecture and componentsKubernetes core conceptsContainerized workloads Container images Container registryContainer runtimesKubernetes basic workflowKubernetes plugin modelKubernetes API primitives Sharing a cluster with namespacesKubernetes in-market distribution and ecosystemsUpstream vanilla KubernetesManaged KubernetesKubernetes ecosystemsSummary
Technical requirements Hands-on Kubernetes toolingCore 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 clusterUsing kubeadm to install a basic Kubernetes clusterSetting up a highly available cluster with kubeadmSummaryMock CKA scenario-based practice test Scenario 1: Scenario 2: Scenario 3 (optional):FAQs
Demystifying Kubernetes cluster maintenanceUpgrading a Kubernetes cluster using kubeadmUpgrading the master node Upgrading the worker node Working with etcdExploring the ETCD cluster pod Listing etcd cluster membersChecking the etcd cluster statusInstalling etcd Backing up etcd Restoring etcdSummaryMock CKA scenario-based practice test Scenario 1Scenario 2Scenario 3Scenario 4FAQs
Technical requirements The basics of Kubernetes workloadsImperative management versus declarative managementUnderstanding podsDeploying and managing applicationsDeploying applicationsPerforming rolling updates and rollbacksRolling updates with kubectl RollbackScaling applicationsReplicaSetsWorkload scheduling Understanding namespacesLabels, node selectors, and annotationsNode affinity and anti-affinityTaints and tolerationsResource managementConfiguring applicationsManifest management with kustomizeCommon package management and templating with HelmSummaryMock CKA scenario-based practice test Scenario 1Scenario 2Scenario 3Scenario 4Scenario 5FAQs
Technical requirements Stateful versus stateless workloadsKubernetes volumes Ephemeral storagePersistent storageCracking stateful applications in KubernetesConfiguring an application with mounted storageConfiguring an application with persistent storageSummaryMock CKA scenario-based practice test Scenario 1Scenario 2FAQs
Technical requirements Securing Kubernetes in layersKubernetes authentication and authorizationService accounts versus user accounts Kubernetes service accounts Organizing the cluster access using kubeconfigConfiguring access to multiple clustersKubernetes authorizationKubernetes RBACManaging the security of Kubernetes applications SummaryMock CKA scenario-based practice test Scenario 1 Scenario 2Scenario 3 FAQs

Technical requirements Understanding the Kubernetes networking modelContainer-to-container communicationPod-to-pod communicationPod-to-service and external-to-service communicationsNode-to-node communicationChoosing an appropriate Container Network Interface pluginCNI networking in Kubernetes Decision metricsConfiguring Ingress controllers and Ingress resourcesHow Ingress and an Ingress controller worksUsing multiple Ingress controllersWork with Ingress resources Ingress annotations and rewrite-targetConfiguring and leveraging CoreDNSCheck whether the CoreDNS server is up and runningPod IPs and DNS hostnamesService IPs and DNS hostnamesSummaryMock CKA scenario-based practice test Scenario 1 Scenario 2Scenario 3Scenario 4Scenario 5Scenario 6FAQs
Technical requirements Monitoring on a cluster nodeChecking whether Metrics Server is installedInstalling Metrics Server in your current Kubernetes cluster Checking out CPU/memory metrics Monitoring applications on a Kubernetes clusterMonitoring the resource usage of an applicationChecking application detailsMonitoring cluster events Managing logs at the cluster node and Pod levelsCluster-level loggingChecking out the node detailsChecking the node status Managing container stdout and stderr logsSummaryMock CKA scenario-based practice test Scenario 1 FAQs
Technical requirementsGeneral practices in Kubernetes troubleshooting Troubleshooting cluster componentsInspecting the clusterInspecting the nodeTroubleshooting applicationsGetting a high-level viewInspecting namespace eventsTroubleshooting failing podsTroubleshooting init containersSummaryFAQs
Technical requirements Troubleshooting RBAC failuresInitiating a minikube cluster Managing a minikube cluster Troubleshooting networkingTroubleshooting a Kubernetes DNS server Troubleshooting a service in Kubernetes Get a shell for troubleshooting SummaryFAQs
Chapter 2 – Installing and Configuring Kubernetes ClustersScenario 1 Scenario 2 Scenario 3 (optional)Chapter 3 – Maintaining Kubernetes ClustersScenario 1Scenario 2Scenario 3Scenario 4Chapter 4 – Application scheduling and lifecycle managementScenario 1Scenario 2Scenario 3Scenario 4Scenario 5Chapter 5 – Demystifying Kubernetes StorageScenario 1Scenario 2Chapter 6 – Securing KubernetesScenario 1Scenario 2Scenario 3 Chapter 7 – Demystifying Kubernetes networkingScenario 1 Scenario 2Scenario 3Scenario 4Scenario 5Scenario 6Chapter 8 – Monitoring and logging Kubernetes Clusters and ApplicationsScenario 1
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Overview

This guide is your ticket to mastering the concepts and practical skills to pass the Certified Kubernetes Administrator (CKA) exam with confidence. Through comprehensive lessons and hands-on projects, you'll gain familiarity with Kubernetes clusters, deployments, storage, security, networking, and troubleshooting.

What this Book will help me do

Gain in-depth knowledge of Kubernetes architecture and core concepts.
Learn how to install and configure Kubernetes clusters for production.
Master managing and troubleshooting clusters and workload deployments.
Understand security measures and networking in Kubernetes implementations.
Get familiar with tools and practices for monitoring and logs in Kubernetes.

Author(s)

Mélony Qin, a seasoned Kubernetes specialist, has dedicated her career to teaching and implementing cutting-edge Kubernetes solutions. With years of hands-on experience in production environments, she excels in making complex concepts approachable. Mélony's goal is to empower professionals to utilize Kubernetes effectively and achieve certification success.

Who is it for?

This book is tailored for developers, DevOps engineers, and cloud architects with a basic understanding of Kubernetes who aim to advance their skills. It's ideal for professionals seeking to gain the Certified Kubernetes Administrator (CKA) credentials. Through practical approaches, it addresses real-world scenarios, making it perfect for those looking to enhance their expertise and career opportunities.