book

Kubernetes: Up and Running

by Kelsey Hightower, Brendan Burns, Joe Beda

September 2017

Intermediate to advanced

269 pages

4h 38m

English

O'Reilly Media, Inc.

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Kubernetes: A DedicationWho Should Read This BookWhy We Wrote This BookA Word on Cloud-Native Applications TodayNavigating This BookOnline ResourcesConventions Used in This BookUsing Code ExamplesO’Reilly SafariHow to Contact Us
VelocityThe Value of ImmutabilityDeclarative ConfigurationSelf-Healing SystemsScaling Your Service and Your TeamsDecouplingEasy Scaling for Applications and ClustersScaling Development Teams with MicroservicesSeparation of Concerns for Consistency and ScalingAbstracting Your InfrastructureEfficiencySummary
Container ImagesThe Docker Image FormatBuilding Application Images with DockerDockerfilesImage SecurityOptimizing Image SizesStoring Images in a Remote RegistryThe Docker Container RuntimeRunning Containers with DockerExploring the kuard ApplicationLimiting Resource UsageCleanupSummary
Installing Kubernetes on a Public Cloud ProviderGoogle Container ServiceInstalling Kubernetes with Azure Container ServiceInstalling Kubernetes on Amazon Web ServicesInstalling Kubernetes Locally Using minikubeRunning Kubernetes on Raspberry PiThe Kubernetes ClientChecking Cluster StatusListing Kubernetes Worker NodesCluster ComponentsKubernetes ProxyKubernetes DNSKubernetes UISummary
NamespacesContextsViewing Kubernetes API ObjectsCreating, Updating, and Destroying Kubernetes ObjectsLabeling and Annotating ObjectsDebugging CommandsSummary
Pods in KubernetesThinking with PodsThe Pod ManifestCreating a PodCreating a Pod ManifestRunning PodsListing PodsPod DetailsDeleting a PodAccessing Your PodUsing Port ForwardingGetting More Info with LogsRunning Commands in Your Container with execCopying Files to and from ContainersHealth ChecksLiveness ProbeReadiness ProbeTypes of Health ChecksResource ManagementResource Requests: Minimum Required ResourcesCapping Resource Usage with LimitsPersisting Data with VolumesUsing Volumes with PodsDifferent Ways of Using Volumes with PodsPersisting Data Using Remote DisksPutting It All TogetherSummary
LabelsApplying LabelsModifying LabelsLabel SelectorsLabel Selectors in API ObjectsAnnotationsDefining AnnotationsCleanupSummary
What Is Service Discovery?The Service ObjectService DNSReadiness ChecksLooking Beyond the ClusterCloud IntegrationAdvanced DetailsEndpointsManual Service Discoverykube-proxy and Cluster IPsCluster IP Environment VariablesCleanupSummary
Reconciliation LoopsRelating Pods and ReplicaSetsAdopting Existing ContainersQuarantining ContainersDesigning with ReplicaSetsReplicaSet SpecPod TemplatesLabelsCreating a ReplicaSetInspecting a ReplicaSetFinding a ReplicaSet from a PodFinding a Set of Pods for a ReplicaSetScaling ReplicaSetsImperative Scaling with kubectl ScaleDeclaratively Scaling with kubectl applyAutoscaling a ReplicaSetDeleting ReplicaSetsSummary
DaemonSet SchedulerCreating DaemonSetsLimiting DaemonSets to Specific NodesAdding Labels to NodesNode SelectorsUpdating a DaemonSetUpdating a DaemonSet by Deleting Individual PodsRolling Update of a DaemonSetDeleting a DaemonSetSummary

The Job ObjectJob PatternsOne ShotParallelismWork QueuesSummary
ConfigMapsCreating ConfigMapsUsing a ConfigMapSecretsCreating SecretsConsuming SecretsPrivate Docker RegistriesNaming ConstraintsManaging ConfigMaps and SecretsListingCreatingUpdatingSummary
Your First DeploymentDeployment InternalsCreating DeploymentsManaging DeploymentsUpdating DeploymentsScaling a DeploymentUpdating a Container ImageRollout HistoryDeployment StrategiesRecreate StrategyRollingUpdate StrategySlowing Rollouts to Ensure Service HealthDeleting a DeploymentSummary
Importing External ServicesServices Without SelectorsLimitations of External Services: Health CheckingRunning Reliable SingletonsRunning a MySQL SingletonDynamic Volume ProvisioningKubernetes-Native Storage with StatefulSetsProperties of StatefulSetsManually Replicated MongoDB with StatefulSetsAutomating MongoDB Cluster CreationPersistent Volumes and StatefulSetsOne Final Thing: Readiness ProbesSummary
ParsePrerequisitesBuilding the parse-serverDeploying the parse-serverTesting ParseGhostConfiguring GhostRedisConfiguring RedisCreating a Redis ServiceDeploying RedisPlaying with Our Redis ClusterSummary
Parts ListFlashing ImagesFirst Boot: MasterSetting Up NetworkingInstalling KubernetesSetting Up the ClusterSummary

Content preview from Kubernetes: Up and Running

Preface

Kubernetes: A Dedication

Kubernetes would like to thank every sysadmin who has woken up at 3 a.m. to restart a process. Every developer who pushed code to production only to find that it didn’t run like it did on their laptop. Every systems architect who mistakenly pointed a load test at the production service because of a leftover hostname that they hadn’t updated. It was the pain, the weird hours, and the weird errors that inspired the development of Kubernetes. In a single sentence: Kubernetes intends to radically simplify the task of building, deploying, and maintaining distributed systems. It has been inspired by decades of real-world experience building reliable systems and it has been designed from the ground up to make that experience, if not euphoric, at least pleasant. We hope you enjoy the book!

Who Should Read This Book

Whether you are new to distributed systems or have been deploying cloud-native systems for years, containers and Kubernetes can help you achieve new levels of velocity, agility, reliability, and efficiency. This book describes the Kubernetes cluster orchestrator and how its tools and APIs can be used to improve the development, delivery, and maintenance of distributed applications. Though no previous experience with Kubernetes is assumed, to make maximal use of the book you should be comfortable building and deploying server-based applications. Familiarity with concepts like load balancers and network storage will be useful, though not required. ...