Which API Group in k8s

To get API resources - supported by your Kubernetes cluster:

 kubectl api-resources -o wideexample:NAME                              SHORTNAMES   APIGROUP                       NAMESPACED   KIND                             VERBSdeployments                       deploy       apps                           true         Deployment                   [create delete deletecollection get list patch update watch]deployments                       deploy       extensions                     true         Deployment                   [create delete deletecollection get list patch update watch]

To get API versions - supported by your Kubernetes cluster:

kubectl api-versions

You can verify f.e. deployment:

kubectl explain deploy KIND:     DeploymentVERSION:  extensions/v1beta1DESCRIPTION:     DEPRECATED - This group version of Deployment is deprecated by     apps/v1beta2/Deployment.

Furthermore you can investigate with api-version:

kubectl explain deploy --api-version apps/v1

Shortly you an specify in you apiGroups like:

apiGroups: ["extensions", "apps"]

You can also configure those settings for your cluster using (for example to test it will work with next 1.16 release) by passing options into --runtime-config in kube-apiserver.

Additional resources:

• api Resources:
• Kubernetes Deprecation Policy

• Additional Notable Feature Updates for specific release please follow like:

  Continued deprecation of extensions/v1beta1, apps/v1beta1, and apps/v1beta2 APIs; these extensions will be retired in 1.16!

kubectl api-resources -o wide provide the supported API resources on the system.

[suresh.vishnoi@xxx1309 ~]$ kubectl api-resources -o wideNAME                                  SHORTNAMES      APIGROUP                       NAMESPACED   KIND                                 VERBSbindings                                                                             true         Binding                              [create]componentstatuses                     cs                                             false        ComponentStatus                      [get list]configmaps                            cm                                             true         ConfigMap                            [create delete deletecollection get list patch update watch]endpoints                             ep                                             true         Endpoints                            [create delete deletecollection get list patch update watch]events                                ev                                             true         Event                                [create delete deletecollection get list patch update watch]controllerrevisions                                   apps                           true         ControllerRevision                   [create delete deletecollection get list patch update watch]daemonsets                            ds              apps                           true         DaemonSet                            [create delete deletecollection get list patch update watch]deployments                           deploy          apps                           true         Deployment                           [create delete deletecollection get list patch update watch]replicasets                           rs              apps                           true         ReplicaSet                           [create delete deletecollection get list patch update watch]

kubectl api-resources -o wide | grep -i deployment will provide the relevant information

apps is the apiGroup for the deployment resource

DaemonSet, Deployment, StatefulSet, and ReplicaSet: will no longer be served from extensions/v1beta1, apps/v1beta1, or apps/v1beta2 in v1.16. Migrate to the apps/v1 API, available since v1.9. Existing persisted data can be retrieved/updated via the apps/v1 API./api-deprecations-in-1-16

This is a little tricky, because both groups apps and extensions are in use in recent kubernetes versions, for example
kubectl get deployments # It is still requested via extensions api group by default.
kubectl get deployments.apps # request via apps group

so until deployments are removed from the extensions apigroup you have to use both apigroups in your role.

• apiGroups: ["apps","extensions"]

https://github.com/kubernetes/kubernetes/issues/67439