kubebuilder: Error `/tmp/k8s-webhook-server/serving-certs/tls.crt: no such file or directory"` has been faced

Error:

$ kubectl logs deployment.apps/project-v3-multigroup-controller-manager -n project-v3-multigroup-system manager
2020-05-08T01:36:20.968Z	INFO	controller-runtime.metrics	metrics server is starting to listen	{"addr": "127.0.0.1:8080"}
2020-05-08T01:36:20.968Z	INFO	controller-runtime.builder	Registering a mutating webhook	{"GVK": "crew.testproject.org/v1, Kind=Captain", "path": "/mutate-crew-testproject-org-v1-captain"}
2020-05-08T01:36:20.968Z	INFO	controller-runtime.webhook	registering webhook	{"path": "/mutate-crew-testproject-org-v1-captain"}
2020-05-08T01:36:20.968Z	INFO	controller-runtime.builder	Registering a validating webhook	{"GVK": "crew.testproject.org/v1, Kind=Captain", "path": "/validate-crew-testproject-org-v1-captain"}
2020-05-08T01:36:20.968Z	INFO	controller-runtime.webhook	registering webhook	{"path": "/validate-crew-testproject-org-v1-captain"}
2020-05-08T01:36:20.969Z	INFO	controller-runtime.builder	skip registering a mutating webhook, admission.Defaulter interface is not implemented	{"GVK": "ship.testproject.org/v1beta1, Kind=Frigate"}
2020-05-08T01:36:20.969Z	INFO	controller-runtime.builder	skip registering a validating webhook, admission.Validator interface is not implemented	{"GVK": "ship.testproject.org/v1beta1, Kind=Frigate"}
2020-05-08T01:36:20.969Z	INFO	setup	starting manager
I0508 01:36:20.969662       1 leaderelection.go:242] attempting to acquire leader lease  project-v3-multigroup-system/14be1926.testproject.org...
2020-05-08T01:36:20.969Z	INFO	controller-runtime.manager	starting metrics server	{"path": "/metrics"}
2020-05-08T01:36:20.970Z	INFO	controller-runtime.webhook.webhooks	starting webhook server
2020-05-08T01:36:20.970Z	DEBUG	controller-runtime.manager	non-leader-election runnable finished	{"runnable type": "*webhook.Server"}
2020-05-08T01:36:20.970Z	ERROR	setup	problem running manager	{"error": "open /tmp/k8s-webhook-server/serving-certs/tls.crt: no such file or directory"}
github.com/go-logr/zapr.(*zapLogger).Error
	/go/pkg/mod/github.com/go-logr/zapr@v0.1.0/zapr.go:128
main.main
	/workspace/main.go:153
runtime.main
	/usr/local/go/src/runtime/proc.go:203

About this issue

Original URL
State: closed
Created 4 years ago
Reactions: 8
Comments: 18 (4 by maintainers)

Most upvoted comments

@libratiger how to do if I want to use webhooks ?

+12

paullaffitte on Oct 19, 2021

Check default/kustomization.yaml and crd/kustomization.yaml for [WEBHOOK] and [CERTMANAGER], we only need to uncomment some lines to get it to work. Also need to have cert-manager installed.

jgillich on Dec 29, 2021

in main.go，it works for me.

	if os.Getenv("ENABLE_WEBHOOKS") != "false" {
		if err = (&batchv1.CronJob{}).SetupWebhookWithManager(mgr); err != nil {
			setupLog.Error(err, "unable to create webhook", "webhook", "CronJob")
			os.Exit(1)
		}
	}

dabao-zhao on Jan 18, 2023

for minikube example

1. ssh to minikube node

2. find the location of .cert file and .key file used by apiserver `ps -ef | grep apiserver`

3. new tls.cert file and tls.key in /tmp/k8s-webhook-server/serving-certs dir, and paste the content from step 2.

greatgeek on May 31, 2023

I commented SetupWebhookWithManager in main.go, which works for me.

// if err = (&batchv1.CronJob2{}).SetupWebhookWithManager(mgr); err != nil {
// ▏setupLog.Error(err, "unable to create webhook", "webhook", "CronJob2")
// ▏os.Exit(1)
// }

CatherineF-dev on Oct 12, 2021

@jgillich we are talking about the go binary here, you just can’t run it in http mode (in order to use an https proxy in front of it for example)

the WebHookServer just won’t run in http mode.

breuerfelix on Oct 20, 2022

Uncomment the lines in your config. https://github.com/kubernetes-sigs/kubebuilder/issues/1501#issuecomment-1002478317

jgillich on Oct 13, 2022

documented already; https://github.com/kubernetes-sigs/kubebuilder/pull/776/files

camilamacedo86 on Jun 30, 2020