The 53 Kubernetes Objects | Quick Sip

If you have been using Kubernetes, or studying about it or know at least something about it, you must have encountered Kubernetes Objects some or the other way. FWIMC, Kubernetes objects are those basic building blocks that empower Kubernetes to manage and orchestrate containerized applications.

Still wondering what are Kubernetes Objects? Ever come across terms like Ptods, Nodes, or Deployments? Well if, then these ARE Kubernetes Objects!

This blog speaks about some interesting findings about how many such kubernetes objects exists, and maybe just an easy read for a few, offering a quick and informative sip of Kubernetes "general knowledge".

So, Did you know!? 🌟

There exists approximately 53 distinct Kinds of Kubernetes Objects officially documented in the Kubernetes API Reference.

It will make more sense to you, checkout 👇👇👇

Core Objects

1. Pod

2. Deployment

3. ReplicaSet

4. Service

5. Node

6. DaemonSet

7. APIGroup

8. APIService

9. AuthorizationPolicy

10. Binding

11. ClusterRole

12. ClusterRoleBinding

13. ComponentStatus

14. ConfigMap

15. ControlledResource

16. CronJob

17. Endpoint

18. Event

19. HorizontalPodAutoscaler

20. LimitRange

21. Namespace

22. NodePool

23. PersistentVolume

24. PersistentVolumeClaim

25. PodDisruptionBudget

26. PodPreset

27. PriorityClass

28. ResourceQuota

29. Secret

30. ServiceAccount

31. StatefulSet

32. TokenReview

These were Core Kubernetes Objects!

Most "core" objects will typically have an apiVersion of "v1". For Example:

apiVersion: v1
kind: Pod
metadata:
  name: example-pod
spec:
   ...

apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding

Some newer core objects may have different versions. For example:

apiVersion: autoscaling/v2beta2
kind: HorizontalPodAutoscaler
metadata:
  name: example-hpa
spec:
   ...

These versions indicate they're still under development or haven't reached stable maturity yet.

Extensions Objects

1. CustomResourceDefinition

2. MutatingWebhookConfiguration

3. ValidatingWebhookConfiguration

Extension objects have their own API groups & versions, separate from the core API

Example: apiextensions.k8s.io/v1

apiVersion: apiextensions.k8s.io/v1
kind: CustomResourceDefinition
metadata:
  name: examplecrds
spec:
   ...

Networking Objects

1. NetworkPolicy

2. Ingress

3. Egress

4. ClusterIP

Networking objects also have their own API groups & versions.

For example: networking.k8s.io/v1

apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: example-network-policy
spec:
   ...

Storage Objects

1. StorageClass

2. VolumeAttachment

Storage objects also have their own API groups & vesrions.

For Example: storage.k8s.io/v1

apiVersion: storage.k8s.io/v1
kind: StorageClass
metadata:
  name: example-storage-class
provisioner: kubernetes.io/aws-ebs
parameters:
  type: gp2

Other Objects

1. PriorityLevelConfiguration

2. RuntimeClass

3. CSIStorageCapacity

4. CSIStorageNode

5. FlowSchema

6. NetworkAttachmentDefinition

7. PodSecurityPolicy

8. Scope

These objects also have their own API groups & vesrions.

For Example, scheduling.k8s.io/v1beta1

apiVersion: scheduling.k8s.io/v1beta1
kind: PriorityLevelConfiguration
metadata:
  name: example-priority-config
spec:
   ...

This list may not be exhaustive and OBViously not reflecting future additions to the Kubernetes API.

Here are some helpful resources:

• Kubernetes API Reference:https://kubernetes.io/docs/concepts/overview/kubernetes-api/

• kubectl api-resources: This command within your cluster will list all available API resources and their respective versions.