book

Certified Kubernetes Administrator (CKA) Study Guide

by Benjamin Muschko

June 2022

Intermediate to advanced

201 pages

4h 42m

English

O'Reilly Media, Inc.

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Who This Book Is ForWhat You Will LearnConventions Used in This BookUsing Code ExamplesO’Reilly Interactive Katacoda LabsO’Reilly Online LearningHow to Contact UsAcknowledgments
Exam ObjectivesCurriculumCluster Architecture, Installation, and ConfigurationWorkloads and SchedulingServices and NetworkingStorageTroubleshootingInvolved Kubernetes PrimitivesExam Environment and TipsCandidate SkillsTime ManagementCommand-Line Tips and TricksSetting a Context and NamespaceUsing an Alias for kubectlUsing kubectl Command Auto-CompletionInternalize Resource Short NamesDeleting Kubernetes ObjectsFinding Object InformationDiscovering Command OptionsPracticing and Practice ExamsSummary
Role-Based Access ControlRBAC High-Level OverviewCreating a SubjectListing ServiceAccountsRendering ServiceAccount DetailsAssigning a ServiceAccount to a PodUnderstanding RBAC API PrimitivesDefault User-Facing RolesCreating RolesListing RolesRendering Role DetailsCreating RoleBindingsListing RoleBindingsRendering RoleBinding DetailsSeeing the RBAC Rules in EffectNamespace-wide and Cluster-wide RBACAggregating RBAC RulesCreating and Managing a Kubernetes ClusterInstalling a ClusterManaging a Highly Available ClusterUpgrading a Cluster VersionBacking Up and Restoring etcdBacking Up etcdRestoring etcdSummaryExam EssentialsSample Exercises
Managing Workloads with DeploymentsUnderstanding DeploymentsCreating DeploymentsListing Deployments and Their PodsRendering Deployment DetailsDeleting a DeploymentPerforming Rolling Updates and RollbacksRolling Out a New RevisionRolling Back to a Previous RevisionScaling WorkloadsManually Scaling a DeploymentManually Scaling a StatefulSetAutoscaling a DeploymentCreating Horizontal Pod AutoscalersListing Horizontal Pod AutoscalersRendering Horizontal Pod Autoscaler DetailsUsing the Beta API Version of an Horizontal Pod AutoscalerDefining and Consuming Configuration DataCreating a ConfigMapConsuming a ConfigMap as Environment VariablesMounting a ConfigMap as a VolumeCreating a SecretConsuming a Secret as Environment VariablesMounting a Secret as a VolumeSummaryExam EssentialsSample Exercises
Understanding How Resource Limits Affect Pod SchedulingDefining Container Resource RequestsDefining Container Resource LimitsDefining Container Resource Requests and LimitsManaging ObjectsDeclarative Object Management Using Configuration FilesDeclarative Object Management Using KustomizeCommon Templating ToolsUsing the YAML Processor yqUsing HelmSummaryExam EssentialsSample Exercises
Kubernetes Networking BasicsConnectivity Between ContainersConnectivity Between PodsUnderstanding ServicesService TypesCreating ServicesListing ServicesRendering Service DetailsPort MappingAccessing a Service with Type ClusterIPAccessing a Service with Type NodePortAccessing a Service with Type LoadBalancerUnderstanding IngressIngress RulesCreating IngressesDefining Path TypesListing IngressesRendering Ingress DetailsAccessing an IngressUsing and Configuring CoreDNSInspecting the CoreDNS PodInspecting the CoreDNS ConfigurationCustomizing the CoreDNS ConfigurationDNS for ServicesResolving a Service by Hostname from the Same NamespaceResolving a Service by Hostname from a Different NamespaceDNS for PodsResolving a Pod by HostnameChoosing an Appropriate Container Network Interface PluginSummaryExam EssentialsSample Exercises
Understanding VolumesVolume TypesCreating and Accessing VolumesUnderstanding Persistent VolumesStatic vs. Dynamic ProvisioningCreating PersistentVolumesConfiguration Options for a PersistentVolumeVolume ModeAccess ModeReclaim PolicyCreating PersistentVolumeClaimsMounting PersistentVolumeClaims in a PodUnderstanding Storage ClassesCreating Storage ClassesUsing Storage ClassesSummaryExam EssentialsSample Exercises
Evaluating Cluster and Node LoggingCluster LoggingNode LoggingMonitoring Cluster Components and ApplicationsTroubleshooting Application FailuresTroubleshooting PodsOpening an Interactive ShellTroubleshooting ServicesTroubleshooting Cluster FailuresTroubleshooting Control Plane NodesTroubleshooting Worker NodesSummaryExam EssentialsSample Exercises
Chapter 2, “Cluster Architecture, Installation, and Configuration”Chapter 3, “Workloads”Chapter 4, “Scheduling and Tooling”Chapter 5, “Services and Networking”Chapter 6, “Storage”Chapter 7, “Troubleshooting”

Overview

Exclusively on O'Reilly: Get more hands-on training and test your CKA exam readiness by working through the Certified Kubernetes Administrator (CKA) Exam Prep Labs playlist. This collection of 30 interactive labs provides hands-on training that enhances the exam prep provided by this study guide.

The ability to administer and monitor a Kubernetes cluster is in high demand today. To meet this need, the Cloud Native Computing Foundation developed a certification exam to establish an administrator's credibility and value in the job market to confidently work in a Kubernetes environment.

The Certified Kubernetes Administrator (CKA) certification exam is different from the typical multiple-choice format of other professional certifications. Instead, the CKA is a performance-based exam that requires deep knowledge of the tasks under immense time pressure.

This study guide walks you through all the topics covered to fully prepare you for the exam. Author Benjamin Muschko also shares his personal experience with preparing for all aspects of the exam.

Learn when and how to apply Kubernetes concepts to administer and troubleshoot a production-grade cluster
Understand the objectives, abilities, and tips and tricks needed to pass the CKA exam
Explore the ins and outs of the kubectl command-line tool
Demonstrate competency to perform the responsibilities of a Kubernetes administrator
Solve real-world Kubernetes problems in a hands-on command-line environment
Effectively navigate and solve questions during the CKA exam