error when creating "deploy/crds/example_v1alpha1_nginx_cr.yaml

[spanichella]

Bug Report

What did you do?
I followed the guideline for installing the operator as described here: https://github.com/operator-framework/operator-sdk/blob/master/doc/helm/user-guide.md

The steps I did are the following:
Helm operator.pdf

when I have executed
$kubectl apply -f deploy/crds/example_v1alpha1_nginx_cr.yaml
I get the following error:

Error from server (NotFound): error when creating "deploy/crds/example_v1alpha1_nginx_cr.yaml": the server could not find the requested resource (post nginxs.example.com)

What did you expect to see?
A clear and concise description of what you expected to happen (or insert a code snippet).

Something like:
$ kubectl get deployment
NAME DESIRED CURRENT UP-TO-DATE AVAILABLE AGE
example-nginx-b9phnoz9spckcrua7ihrbkrt1 2 2 2 2 1m
Check the pods to confirm 2 replicas were created:

$ kubectl get pods
NAME READY STATUS RESTARTS AGE
example-nginx-b9phnoz9spckcrua7ihrbkrt1-f8f9c875d-fjcr9 1/1 Running 0 1m
example-nginx-b9phnoz9spckcrua7ihrbkrt1-f8f9c875d-ljbzl 1/1 Running 0 1m

What did you see instead? Under which circumstances?
A clear and concise description of what you expected to happen (or insert a code snippet).
"Error from server (NotFound): error when creating "deploy/crds/example_v1alpha1_nginx_cr.yaml": the server could not find the requested resource (post nginxs.example.com)"

Environment

• operator-sdk version:

operator-sdk version v0.3.0+git

• Kubernetes version information:

  Insert output of kubectl version here

lient Version: version.Info{Major:"1", Minor:"11", GitVersion:"v1.11.2", GitCommit:"bb9ffb1654d4a729bb4cec18ff088eacc153c239", GitTreeState:"clean", BuildDate:"2018-08-07T23:17:28Z", GoVersion:"go1.10.3", Compiler:"gc", Platform:"darwin/amd64"}
Server Version: version.Info{Major:"1", Minor:"10+", GitVersion:"v1.10.0+b81c8f8", GitCommit:"b81c8f8", GitTreeState:"clean", BuildDate:"2019-01-13T08:18:56Z", GoVersion:"go1.10.3", Compiler:"gc", Platform:"linux/amd64"}

• Kubernetes cluster kind:

"I'm using minishift"

• Are you writing your operator in ansible, helm, or go?
  Helm

Possible Solution

Additional context
Add any other context about the problem here.

[spanichella]

One thing that I noticed is that when I run:

$kubectl get service
I get:
"No resources found"

Maybe this is the main problem?

[joelanford]

@spanichella There is an issue in Kubernetes prior to 1.11.2 that causes pluralization issues with certain CRDs. The CRD name "nginx" triggers the bug. That's why we recommend 1.11.3+ in the Helm user guide.

Can you upgrade your Kubernetes version (both client and server) to 1.11.3+ and try again?

[ron1]

Are you able to identify the specific Kubernetes CRD pluralization issue? Do you know if the fix has been back-ported to any of the OpenShift 3.11.x releases?

[joelanford]

@ron1 The original issue is documented here: kubernetes/kubernetes#67235. And it was fixed here: kubernetes/kubernetes#66249

OpenShift 3.11 includes this fix as well (openshift/origin#20392)

[joelanford]

@spanichella I'm closing this since I think upgrading will resolve your issue. If it doesn't please feel free to re-open!