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Kubernetes Resources

In Kubernetes, resources are like Legobuilding blocks that represent objects you useused to buildcreate and manage your cluster. Each Kubernetes resource is an object with metadata (such as names and labels) and a desired state that defines its behavior,behavior. allAll ofobjects whichin Kubernetes are managed by an API and stored in the etcd database.

For example, a Pod resource defines how to run a group of containers, while a Service resource manages network access to those containers. Everything you can manage with kubectl or the Kubernetes API - like workloads, storage, or configuration - is a resource, making them essential for defining and controlling your cluster's behavior.

The following command will print outlists all relevantthe resources that can be managed in a Kubernetes cluster, including their names, short names, API versions, and whether they are namespaced:

kubectl api-resources

The most relevant resources for the KCNA exam are marked red

Core Resources

  • Pod
  • Service
  • ConfigMap
  • Secret
  • Namespace
  • PersistentVolume
  • PersistentVolumeClaim
  • ServiceAccount
  • Binding
  • ComponentStatus
  • Endpoints
  • Event
  • LimitRange
  • PodTemplate
  • ReplicationController
  • ResourceQuota

Workloads

  • Deployment
  • ReplicaSet
  • DaemonSet
  • StatefulSet
  • CronJob
  • Job
  • ControllerRevision

Networking

  • Ingress
  • NetworkPolicy
  • IngressClass

RBAC (Role-Based Access Control)

  • Role
  • RoleBinding
  • ClusterRole
  • ClusterRoleBinding

Storage

  • StorageClass
  • CSIDriver
  • CSINode
  • CSIStorageCapacity
  • VolumeAttachment

Admission Control

  • MutatingWebhookConfiguration
  • ValidatingWebhookConfiguration

API Extensions

  • CustomResourceDefinition
  • APIService

Authentication and Authorization

  • TokenReview
  • LocalSubjectAccessReview
  • SelfSubjectAccessReview
  • SelfSubjectRulesReview
  • SubjectAccessReview

Autoscaling

  • HorizontalPodAutoscaler

Certificates

  • CertificateSigningRequest

Coordination

  • Lease

Discovery

  • EndpointSlice

Events

  • Event

Flow Control

  • FlowSchema
  • PriorityLevelConfiguration

Node Management

  • RuntimeClass

Policies

  • PodDisruptionBudget
  • PodSecurityPolicy

Scheduling

  • PriorityClass
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