Delete custom resource in Kubernetes

example-crd.yml

#Resource location: thttps://raw.githubusercontent.com/inlets/inlets-operator/master/artifacts/crd.yaml

apiVersion: apiextensions.k8s.io/v1beta1
kind: CustomResourceDefinition
metadata:
  name: tunnels.inlets.inlets.dev
spec:
  group: inlets.inlets.dev
  version: v1alpha1
  names:
    kind: Tunnel
    plural: tunnels
  scope: Namespaced
  additionalPrinterColumns:
  - name: Service
    type: string
    JSONPath: .spec.serviceName
  - name: HostStatus
    type: string
    JSONPath: .status.hostStatus
  - name: HostIP
    type: string
    JSONPath: .status.hostIP
  - name: HostID
    type: string
    JSONPath: .status.hostId
  - name: Tunnel
    type: string
    JSONPath: .spec.client_deployment.name

After executing command:

kubectl apply -f https://raw.githubusercontent.com/inlets/inlets-operator/master/artifacts/crd.yaml

At first I did not know what resources it created as it did not list Pods, Service or Deployments form kubectl get command.

After some research, I came to know it created a resource as a Kubernetes API.

kubectl api-resources

Output:
NAME SHORTNAMES APIGROUP NAMESPACED KIND
tunnels inlets.inlets.dev true Tunnel

Now, I wanted to know how to delete this. Tried to delete as other reosurce like:

kubectl delete <resource-type> <resource-name>

But it did not work. Then after some research I was able to successfully, delete the resource.

kubectl delete -f https://raw.githubusercontent.com/inlets/inlets-operator/master/artifacts/crd.yaml

Output:
"customresourcedefinition.apiextensions.k8s.io "tunnels.inlets.inlets.dev" deleted"

Further. Sometimes the resources settings can cause the complete deletion issue. An example discussion below:
https://stackoverflow.com/questions/52009124/not-able-to-completely-remove-kubernetes-customresource