kind nginx ingress validation webhook failed calling "validate.nginx.ingress.kubernetes.io": an error on the server ("") has prevented the request from succeeding

[seizadi]

NGINX Ingress controller version: v0.47.0

Kubernetes version (use kubectl version):
Client Version: version.Info{Major:"1", Minor:"19", GitVersion:"v1.19.3", GitCommit:"1e11e4a2108024935ecfcb2912226cedeafd99df", GitTreeState:"clean", BuildDate:"2020-10-14T12:50:19Z", GoVersion:"go1.15.2", Compiler:"gc", Platform:"darwin/amd64"}
Server Version: version.Info{Major:"1", Minor:"21", GitVersion:"v1.21.1", GitCommit:"5e58841cce77d4bc13713ad2b91fa0d961e69192", GitTreeState:"clean", BuildDate:"2021-05-21T23:01:33Z", GoVersion:"go1.16.4", Compiler:"gc", Platform:"linux/amd64"}

Environment: kind

• Cloud provider or hardware configuration: Macbook
• OS (e.g. from /etc/os-release): MacOS
• Kernel (e.g. uname -a):
• Darwin sc-l-seizadi.lan 19.6.0 Darwin Kernel Version 19.6.0: Mon Aug 31 22:12:52 PDT 2020; root:xnu-6153.141.2~1/RELEASE_X86_64 x86_64
• Install tools:
• Others:

What happened:
Could not Install Ingress due to Validation Error

❯ helm install cmdb .
Error: Internal error occurred: failed calling webhook "validate.nginx.ingress.kubernetes.io": an error on the server ("") has prevented the request from succeeding

From Ingress Controller Logs...
❯ k --namespace ingress-nginx logs ingress-nginx-controller-744f97c4f-c5888

NGINX Ingress controller
Release: v0.47.0
Build: 7201e37
Repository: https://github.com/kubernetes/ingress-nginx
nginx version: nginx/1.20.1

---

I0630 18:38:11.456936 7 flags.go:208] "Watching for Ingress" class="nginx"
W0630 18:38:11.457010 7 flags.go:213] Ingresses with an empty class will also be processed by this Ingress controller
....
....
E0630 19:00:14.051721 7 server.go:84] "failed to process webhook request" err="rejecting admission review because the request does not contain an Ingress resource but networking.k8s.io/v1, Kind=Ingress with name cmdb in namespace default"

What you expected to happen:
Ingress should be have installed rather than rejected by validation webhook.

There is a regression with kind nginx ingress, see similar issue with minikube: kubernetes/minikube#11121

How to reproduce it:

Install kind

• Kind https://kind.sigs.k8s.io/docs/user/quick-start/

Install the ingress controller

kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/master/deploy/static/provider/kind/deploy.yaml

Install following Ingress using helm:

echo "
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
name: RELEASE-NAME-cmdb
namespace: default
labels:
helm.sh/chart: cmdb-0.3.0
app.kubernetes.io/name: cmdb
app.kubernetes.io/instance: RELEASE-NAME
app.kubernetes.io/version: "seizadi-dev-4d95422-unsupported"
app.kubernetes.io/managed-by: Helm
spec:
rules:
- host: "localhost"
http:
paths:
- path: /cmdb
pathType: ImplementationSpecific
backend:
service:
name: RELEASE-NAME-cmdb
port:
number: 8080

" | kubectl apply -f -

Anything else we need to know:

I reverted to the older nginx deployment before the last PR merge and it worked, so this is a work around until issue is resolved:
kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/a8408cdb51086a099a2c71ed3e68363eb3a7ae60/deploy/static/provider/kind/deploy.yaml

/kind bug

[kundan2707]

/assign

[rikatz]

duplicate of #7305

Please take a look there, as we're suggesting people now to use the older nginx controller version in this case

/close

[k8s-ci-robot]

@rikatz: Closing this issue.

In response to this:

duplicate of #7305

Please take a look there, as we're suggesting people now to use the older nginx controller version in this case

/close

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[seizadi]

I did not find #7305 because before I opened this Issue I searched for open Issues. You had closed #7305 and also are closing this one so until search engines index these people will have a hard time finding them to resolve their Issues. I suggest you keep this Issue or #7305 open until you have fixed it with a PR, so that install using kind docs does not cause problem. If there is work around does not mean you can close #7305 or #7306, please keep one open.

[BenTheElder]

xref: kubernetes-sigs/kind#2306