Kubernetes Resources

In Kubernetes, resources are like Lego blocks that represent objects you use to build 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, all of which are 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 out all relevant resources 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