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Add e2e test for mutating webhooks affecting webhook-config objects

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This commit is contained in:
jennybuckley 2018-09-25 11:21:00 -07:00
parent bc6cb90820
commit 1ba644ef6b
6 changed files with 170 additions and 39 deletions
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139
test/e2e/apimachinery/webhook.go
View File

@ -52,17 +52,18 @@ const (
roleBindingName = "webhook-auth-reader"
// The webhook configuration names should not be reused between test instances.
crWebhookConfigName = "e2e-test-webhook-config-cr"
webhookConfigName = "e2e-test-webhook-config"
attachingPodWebhookConfigName = "e2e-test-webhook-config-attaching-pod"
mutatingWebhookConfigName = "e2e-test-mutating-webhook-config"
podMutatingWebhookConfigName = "e2e-test-mutating-webhook-pod"
crMutatingWebhookConfigName = "e2e-test-mutating-webhook-config-cr"
webhookFailClosedConfigName = "e2e-test-webhook-fail-closed"
webhookForWebhooksConfigName = "e2e-test-webhook-for-webhooks-config"
removableValidatingHookName = "e2e-test-should-be-removable-validating-webhook-config"
removableMutatingHookName = "e2e-test-should-be-removable-mutating-webhook-config"
crdWebhookConfigName = "e2e-test-webhook-config-crd"
crWebhookConfigName = "e2e-test-webhook-config-cr"
webhookConfigName = "e2e-test-webhook-config"
attachingPodWebhookConfigName = "e2e-test-webhook-config-attaching-pod"
mutatingWebhookConfigName = "e2e-test-mutating-webhook-config"
podMutatingWebhookConfigName = "e2e-test-mutating-webhook-pod"
crMutatingWebhookConfigName = "e2e-test-mutating-webhook-config-cr"
webhookFailClosedConfigName = "e2e-test-webhook-fail-closed"
validatingWebhookForWebhooksConfigName = "e2e-test-validating-webhook-for-webhooks-config"
mutatingWebhookForWebhooksConfigName = "e2e-test-mutating-webhook-for-webhooks-config"
dummyValidatingWebhookConfigName = "e2e-test-dummy-validating-webhook-config"
dummyMutatingWebhookConfigName = "e2e-test-dummy-mutating-webhook-config"
crdWebhookConfigName = "e2e-test-webhook-config-crd"
skipNamespaceLabelKey = "skip-webhook-admission"
skipNamespaceLabelValue = "yes"
@ -75,6 +76,8 @@ const (
failNamespaceLabelKey = "fail-closed-webhook"
failNamespaceLabelValue = "yes"
failNamespaceName = "fail-closed-namesapce"
addedLabelKey = "added-label"
addedLabelValue = "yes"
)
var serverWebhookVersion = utilversion.MustParseSemantic("v1.8.0")
@ -154,10 +157,12 @@ var _ = SIGDescribe("AdmissionWebhook", func() {
testMutatingPodWebhook(f)
})
It("Should not be able to prevent deleting validating-webhook-configurations or mutating-webhook-configurations", func() {
webhookCleanup := registerWebhookForWebhookConfigurations(f, context)
defer webhookCleanup()
testWebhookForWebhookConfigurations(f)
It("Should not be able to mutate or prevent deletion of webhook configuration objects", func() {
validatingWebhookCleanup := registerValidatingWebhookForWebhookConfigurations(f, context)
defer validatingWebhookCleanup()
mutatingWebhookCleanup := registerMutatingWebhookForWebhookConfigurations(f, context)
defer mutatingWebhookCleanup()
testWebhooksForWebhookConfigurations(f)
})
It("Should mutate custom resource", func() {
@ -801,16 +806,18 @@ func testFailClosedWebhook(f *framework.Framework) {
}
}
func registerWebhookForWebhookConfigurations(f *framework.Framework, context *certContext) func() {
func registerValidatingWebhookForWebhookConfigurations(f *framework.Framework, context *certContext) func() {
var err error
client := f.ClientSet
By("Registering a webhook on ValidatingWebhookConfiguration and MutatingWebhookConfiguration objects, via the AdmissionRegistration API")
By("Registering a validating webhook on ValidatingWebhookConfiguration and MutatingWebhookConfiguration objects, via the AdmissionRegistration API")
namespace := f.Namespace.Name
configName := webhookForWebhooksConfigName
configName := validatingWebhookForWebhooksConfigName
failurePolicy := v1beta1.Fail
// This webhook will deny all requests to Delete admissionregistration objects
// This webhook denies all requests to Delete validating webhook configuration and
// mutating webhook configuration objects. It should never be called, however, because
// dynamic admission webhooks should not be called on requests involving webhook configuration objects.
_, err = client.AdmissionregistrationV1beta1().ValidatingWebhookConfigurations().Create(&v1beta1.ValidatingWebhookConfiguration{
ObjectMeta: metav1.ObjectMeta{
Name: configName,
@ -841,7 +848,6 @@ func registerWebhookForWebhookConfigurations(f *framework.Framework, context *ce
},
},
})
framework.ExpectNoError(err, "registering webhook config %s with namespace %s", configName, namespace)
// The webhook configuration is honored in 10s.
@ -852,23 +858,76 @@ func registerWebhookForWebhookConfigurations(f *framework.Framework, context *ce
}
}
// This test assumes that the deletion-rejecting webhook defined in
// registerWebhookForWebhookConfigurations is in place.
func testWebhookForWebhookConfigurations(f *framework.Framework) {
func registerMutatingWebhookForWebhookConfigurations(f *framework.Framework, context *certContext) func() {
var err error
client := f.ClientSet
By("Creating a validating-webhook-configuration object")
By("Registering a mutating webhook on ValidatingWebhookConfiguration and MutatingWebhookConfiguration objects, via the AdmissionRegistration API")
namespace := f.Namespace.Name
configName := mutatingWebhookForWebhooksConfigName
failurePolicy := v1beta1.Fail
// This webhook adds a label to all requests create to validating webhook configuration and
// mutating webhook configuration objects. It should never be called, however, because
// dynamic admission webhooks should not be called on requests involving webhook configuration objects.
_, err = client.AdmissionregistrationV1beta1().MutatingWebhookConfigurations().Create(&v1beta1.MutatingWebhookConfiguration{
ObjectMeta: metav1.ObjectMeta{
Name: configName,
},
Webhooks: []v1beta1.Webhook{
{
Name: "add-label-to-webhook-configurations.k8s.io",
Rules: []v1beta1.RuleWithOperations{{
Operations: []v1beta1.OperationType{v1beta1.Create},
Rule: v1beta1.Rule{
APIGroups: []string{"admissionregistration.k8s.io"},
APIVersions: []string{"*"},
Resources: []string{
"validatingwebhookconfigurations",
"mutatingwebhookconfigurations",
},
},
}},
ClientConfig: v1beta1.WebhookClientConfig{
Service: &v1beta1.ServiceReference{
Namespace: namespace,
Name: serviceName,
Path: strPtr("/add-label"),
},
CABundle: context.signingCert,
},
FailurePolicy: &failurePolicy,
},
},
})
framework.ExpectNoError(err, "registering webhook config %s with namespace %s", configName, namespace)
// The webhook configuration is honored in 10s.
time.Sleep(10 * time.Second)
return func() {
err := client.AdmissionregistrationV1beta1().MutatingWebhookConfigurations().Delete(configName, nil)
framework.ExpectNoError(err, "deleting webhook config %s with namespace %s", configName, namespace)
}
}
// This test assumes that the deletion-rejecting webhook defined in
// registerValidatingWebhookForWebhookConfigurations and the webhook-config-mutating
// webhook defined in registerMutatingWebhookForWebhookConfigurations already exist.
func testWebhooksForWebhookConfigurations(f *framework.Framework) {
var err error
client := f.ClientSet
By("Creating a dummy validating-webhook-configuration object")
namespace := f.Namespace.Name
failurePolicy := v1beta1.Ignore
_, err = client.AdmissionregistrationV1beta1().ValidatingWebhookConfigurations().Create(&v1beta1.ValidatingWebhookConfiguration{
mutatedValidatingWebhookConfiguration, err := client.AdmissionregistrationV1beta1().ValidatingWebhookConfigurations().Create(&v1beta1.ValidatingWebhookConfiguration{
ObjectMeta: metav1.ObjectMeta{
Name: removableValidatingHookName,
Name: dummyValidatingWebhookConfigName,
},
Webhooks: []v1beta1.Webhook{
{
Name: "should-be-removable-validating-webhook.k8s.io",
Name: "dummy-validating-webhook.k8s.io",
Rules: []v1beta1.RuleWithOperations{{
Operations: []v1beta1.OperationType{v1beta1.Create},
// This will not match any real resources so this webhook should never be called.
@ -894,25 +953,28 @@ func testWebhookForWebhookConfigurations(f *framework.Framework) {
},
},
})
framework.ExpectNoError(err, "registering webhook config %s with namespace %s", removableValidatingHookName, namespace)
framework.ExpectNoError(err, "registering webhook config %s with namespace %s", dummyValidatingWebhookConfigName, namespace)
if mutatedValidatingWebhookConfiguration.ObjectMeta.Labels != nil && mutatedValidatingWebhookConfiguration.ObjectMeta.Labels[addedLabelKey] == addedLabelValue {
framework.Failf("expected %s not to be mutated by mutating webhooks but it was", dummyValidatingWebhookConfigName)
}
// The webhook configuration is honored in 10s.
time.Sleep(10 * time.Second)
By("Deleting the validating-webhook-configuration, which should be possible to remove")
err = client.AdmissionregistrationV1beta1().ValidatingWebhookConfigurations().Delete(removableValidatingHookName, nil)
framework.ExpectNoError(err, "deleting webhook config %s with namespace %s", removableValidatingHookName, namespace)
err = client.AdmissionregistrationV1beta1().ValidatingWebhookConfigurations().Delete(dummyValidatingWebhookConfigName, nil)
framework.ExpectNoError(err, "deleting webhook config %s with namespace %s", dummyValidatingWebhookConfigName, namespace)
By("Creating a mutating-webhook-configuration object")
By("Creating a dummy mutating-webhook-configuration object")
_, err = client.AdmissionregistrationV1beta1().MutatingWebhookConfigurations().Create(&v1beta1.MutatingWebhookConfiguration{
mutatedMutatingWebhookConfiguration, err := client.AdmissionregistrationV1beta1().MutatingWebhookConfigurations().Create(&v1beta1.MutatingWebhookConfiguration{
ObjectMeta: metav1.ObjectMeta{
Name: removableMutatingHookName,
Name: dummyMutatingWebhookConfigName,
},
Webhooks: []v1beta1.Webhook{
{
Name: "should-be-removable-mutating-webhook.k8s.io",
Name: "dummy-mutating-webhook.k8s.io",
Rules: []v1beta1.RuleWithOperations{{
Operations: []v1beta1.OperationType{v1beta1.Create},
// This will not match any real resources so this webhook should never be called.
@ -938,15 +1000,18 @@ func testWebhookForWebhookConfigurations(f *framework.Framework) {
},
},
})
framework.ExpectNoError(err, "registering webhook config %s with namespace %s", removableMutatingHookName, namespace)
framework.ExpectNoError(err, "registering webhook config %s with namespace %s", dummyMutatingWebhookConfigName, namespace)
if mutatedMutatingWebhookConfiguration.ObjectMeta.Labels != nil && mutatedMutatingWebhookConfiguration.ObjectMeta.Labels[addedLabelKey] == addedLabelValue {
framework.Failf("expected %s not to be mutated by mutating webhooks but it was", dummyMutatingWebhookConfigName)
}
// The webhook configuration is honored in 10s.
time.Sleep(10 * time.Second)
By("Deleting the mutating-webhook-configuration, which should be possible to remove")
err = client.AdmissionregistrationV1beta1().MutatingWebhookConfigurations().Delete(removableMutatingHookName, nil)
framework.ExpectNoError(err, "deleting webhook config %s with namespace %s", removableMutatingHookName, namespace)
err = client.AdmissionregistrationV1beta1().MutatingWebhookConfigurations().Delete(dummyMutatingWebhookConfigName, nil)
framework.ExpectNoError(err, "deleting webhook config %s with namespace %s", dummyMutatingWebhookConfigName, namespace)
}
func createNamespace(f *framework.Framework, ns *v1.Namespace) error {

1
test/images/webhook/BUILD
View File

@ -3,6 +3,7 @@ load("@io_bazel_rules_go//go:def.bzl", "go_binary", "go_library", "go_test")
go_library(
name = "go_default_library",
srcs = [
"addlabel.go",
"alwaysdeny.go",
"config.go",
"configmap.go",

2
test/images/webhook/VERSION
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@ -1 +1 @@
1.12v2
1.13v1

60
test/images/webhook/addlabel.go Normal file
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@ -0,0 +1,60 @@
/*
Copyright 2018 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package main
import (
"encoding/json"
"github.com/golang/glog"
"k8s.io/api/admission/v1beta1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
)
const (
addFirstLabelPatch string = `[
{ "op": "add", "path": "/metadata/labels", "value": {"added-label": "yes"}}
]`
addAdditionalLabelPatch string = `[
{ "op": "add", "path": "/metadata/labels/added-label", "value": "yes" }
]`
)
// Add a label {"added-label": "yes"} to the object
func addLabel(ar v1beta1.AdmissionReview) *v1beta1.AdmissionResponse {
glog.V(2).Info("calling add-label")
obj := struct {
metav1.ObjectMeta
Data map[string]string
}{}
raw := ar.Request.Object.Raw
err := json.Unmarshal(raw, &obj)
if err != nil {
glog.Error(err)
return toAdmissionResponse(err)
}
reviewResponse := v1beta1.AdmissionResponse{}
reviewResponse.Allowed = true
if len(obj.ObjectMeta.Labels) == 0 {
reviewResponse.Patch = []byte(addFirstLabelPatch)
} else {
reviewResponse.Patch = []byte(addAdditionalLabelPatch)
}
pt := v1beta1.PatchTypeJSONPatch
reviewResponse.PatchType = &pt
return &reviewResponse
}

5
test/images/webhook/main.go
View File

@ -95,6 +95,10 @@ func serveAlwaysDeny(w http.ResponseWriter, r *http.Request) {
serve(w, r, alwaysDeny)
}
func serveAddLabel(w http.ResponseWriter, r *http.Request) {
serve(w, r, addLabel)
}
func servePods(w http.ResponseWriter, r *http.Request) {
serve(w, r, admitPods)
}
@ -133,6 +137,7 @@ func main() {
flag.Parse()
http.HandleFunc("/always-deny", serveAlwaysDeny)
http.HandleFunc("/add-label", serveAddLabel)
http.HandleFunc("/pods", servePods)
http.HandleFunc("/pods/attach", serveAttachingPods)
http.HandleFunc("/mutating-pods", serveMutatePods)

2
test/utils/image/manifest.go
View File

@ -82,7 +82,7 @@ var (
PrivateRegistry = registry.PrivateRegistry
sampleRegistry = registry.SampleRegistry
AdmissionWebhook = ImageConfig{e2eRegistry, "webhook", "1.12v2"}
AdmissionWebhook = ImageConfig{e2eRegistry, "webhook", "1.13v1"}
APIServer = ImageConfig{e2eRegistry, "sample-apiserver", "1.0"}
AppArmorLoader = ImageConfig{e2eRegistry, "apparmor-loader", "1.0"}
BusyBox = ImageConfig{dockerLibraryRegistry, "busybox", "1.29"}