mirror of
https://github.com/k3s-io/kubernetes.git
synced 2025-07-23 03:41:45 +00:00
Consider equivalent resources when calling webhook
This commit is contained in:
parent
8504a0e556
commit
f2abdcf43f
@ -43,15 +43,20 @@ filegroup(
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go_test(
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name = "go_default_test",
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srcs = ["conversion_test.go"],
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srcs = [
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"conversion_test.go",
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"webhook_test.go",
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],
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embed = [":go_default_library"],
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deps = [
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"//staging/src/k8s.io/api/admissionregistration/v1beta1:go_default_library",
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"//staging/src/k8s.io/apimachinery/pkg/apis/meta/v1:go_default_library",
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"//staging/src/k8s.io/apimachinery/pkg/apis/meta/v1/unstructured:go_default_library",
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"//staging/src/k8s.io/apimachinery/pkg/runtime:go_default_library",
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"//staging/src/k8s.io/apimachinery/pkg/runtime/schema:go_default_library",
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"//staging/src/k8s.io/apimachinery/pkg/util/diff:go_default_library",
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"//staging/src/k8s.io/apiserver/pkg/admission:go_default_library",
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"//staging/src/k8s.io/apiserver/pkg/admission/plugin/webhook/namespace:go_default_library",
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"//staging/src/k8s.io/apiserver/pkg/apis/example:go_default_library",
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"//staging/src/k8s.io/apiserver/pkg/apis/example/v1:go_default_library",
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"//staging/src/k8s.io/apiserver/pkg/apis/example2/v1:go_default_library",
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@ -24,6 +24,7 @@ import (
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admissionv1beta1 "k8s.io/api/admission/v1beta1"
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"k8s.io/api/admissionregistration/v1beta1"
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apierrors "k8s.io/apimachinery/pkg/api/errors"
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"k8s.io/apimachinery/pkg/runtime/schema"
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"k8s.io/apiserver/pkg/admission"
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genericadmissioninit "k8s.io/apiserver/pkg/admission/initializer"
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"k8s.io/apiserver/pkg/admission/plugin/webhook/config"
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@ -127,7 +128,7 @@ func (a *Webhook) ValidateInitialization() error {
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// shouldCallHook returns invocation details if the webhook should be called, nil if the webhook should not be called,
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// or an error if an error was encountered during evaluation.
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func (a *Webhook) shouldCallHook(h *v1beta1.Webhook, attr admission.Attributes) (*WebhookInvocation, *apierrors.StatusError) {
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func (a *Webhook) shouldCallHook(h *v1beta1.Webhook, attr admission.Attributes, o admission.ObjectInterfaces) (*WebhookInvocation, *apierrors.StatusError) {
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var err *apierrors.StatusError
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var invocation *WebhookInvocation
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for _, r := range h.Rules {
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@ -142,6 +143,36 @@ func (a *Webhook) shouldCallHook(h *v1beta1.Webhook, attr admission.Attributes)
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break
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}
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}
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if invocation == nil && h.MatchPolicy != nil && *h.MatchPolicy == v1beta1.Equivalent {
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attrWithOverride := &attrWithResourceOverride{Attributes: attr}
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equivalents := o.GetEquivalentResourceMapper().EquivalentResourcesFor(attr.GetResource(), attr.GetSubresource())
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// honor earlier rules first
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OuterLoop:
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for _, r := range h.Rules {
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// see if the rule matches any of the equivalent resources
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for _, equivalent := range equivalents {
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if equivalent == attr.GetResource() {
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// exclude attr.GetResource(), which we already checked
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continue
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}
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attrWithOverride.resource = equivalent
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m := rules.Matcher{Rule: r, Attr: attrWithOverride}
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if m.Matches() {
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kind := o.GetEquivalentResourceMapper().KindFor(equivalent, attr.GetSubresource())
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if kind.Empty() {
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return nil, apierrors.NewInternalError(fmt.Errorf("unable to convert to %v: unknown kind", equivalent))
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}
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invocation = &WebhookInvocation{
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Webhook: h,
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Resource: equivalent,
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Subresource: attr.GetSubresource(),
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Kind: kind,
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}
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break OuterLoop
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}
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}
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}
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}
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if invocation == nil {
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return nil, nil
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@ -155,6 +186,13 @@ func (a *Webhook) shouldCallHook(h *v1beta1.Webhook, attr admission.Attributes)
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return invocation, nil
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}
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type attrWithResourceOverride struct {
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admission.Attributes
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resource schema.GroupVersionResource
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}
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func (a *attrWithResourceOverride) GetResource() schema.GroupVersionResource { return a.resource }
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// Dispatch is called by the downstream Validate or Admit methods.
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func (a *Webhook) Dispatch(attr admission.Attributes, o admission.ObjectInterfaces) error {
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if rules.IsWebhookConfigurationResource(attr) {
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@ -169,7 +207,7 @@ func (a *Webhook) Dispatch(attr admission.Attributes, o admission.ObjectInterfac
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var relevantHooks []*WebhookInvocation
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for i := range hooks {
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invocation, err := a.shouldCallHook(&hooks[i], attr)
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invocation, err := a.shouldCallHook(&hooks[i], attr, o)
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if err != nil {
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return err
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}
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@ -0,0 +1,316 @@
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/*
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Copyright 2019 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package generic
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import (
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"strings"
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"testing"
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"k8s.io/api/admissionregistration/v1beta1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/apimachinery/pkg/runtime/schema"
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"k8s.io/apiserver/pkg/admission"
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"k8s.io/apiserver/pkg/admission/plugin/webhook/namespace"
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)
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func TestShouldCallHook(t *testing.T) {
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a := &Webhook{namespaceMatcher: &namespace.Matcher{}}
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allScopes := v1beta1.AllScopes
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exactMatch := v1beta1.Exact
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equivalentMatch := v1beta1.Equivalent
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mapper := runtime.NewEquivalentResourceRegistryWithIdentity(func(resource schema.GroupResource) string {
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if resource.Resource == "deployments" {
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// co-locate deployments in all API groups
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return "/deployments"
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}
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return ""
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})
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mapper.RegisterKindFor(schema.GroupVersionResource{"extensions", "v1beta1", "deployments"}, "", schema.GroupVersionKind{"extensions", "v1beta1", "Deployment"})
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mapper.RegisterKindFor(schema.GroupVersionResource{"apps", "v1", "deployments"}, "", schema.GroupVersionKind{"apps", "v1", "Deployment"})
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mapper.RegisterKindFor(schema.GroupVersionResource{"apps", "v1beta1", "deployments"}, "", schema.GroupVersionKind{"apps", "v1beta1", "Deployment"})
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mapper.RegisterKindFor(schema.GroupVersionResource{"apps", "v1alpha1", "deployments"}, "", schema.GroupVersionKind{"apps", "v1alpha1", "Deployment"})
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mapper.RegisterKindFor(schema.GroupVersionResource{"extensions", "v1beta1", "deployments"}, "scale", schema.GroupVersionKind{"extensions", "v1beta1", "Scale"})
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mapper.RegisterKindFor(schema.GroupVersionResource{"apps", "v1", "deployments"}, "scale", schema.GroupVersionKind{"autoscaling", "v1", "Scale"})
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mapper.RegisterKindFor(schema.GroupVersionResource{"apps", "v1beta1", "deployments"}, "scale", schema.GroupVersionKind{"apps", "v1beta1", "Scale"})
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mapper.RegisterKindFor(schema.GroupVersionResource{"apps", "v1alpha1", "deployments"}, "scale", schema.GroupVersionKind{"apps", "v1alpha1", "Scale"})
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// register invalid kinds to trigger an error
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mapper.RegisterKindFor(schema.GroupVersionResource{"example.com", "v1", "widgets"}, "", schema.GroupVersionKind{"", "", ""})
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mapper.RegisterKindFor(schema.GroupVersionResource{"example.com", "v2", "widgets"}, "", schema.GroupVersionKind{"", "", ""})
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interfaces := &admission.RuntimeObjectInterfaces{EquivalentResourceMapper: mapper}
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testcases := []struct {
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name string
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webhook *v1beta1.Webhook
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attrs admission.Attributes
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expectCall bool
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expectErr string
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expectCallResource schema.GroupVersionResource
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expectCallSubresource string
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expectCallKind schema.GroupVersionKind
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}{
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{
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name: "no rules (just write)",
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webhook: &v1beta1.Webhook{Rules: []v1beta1.RuleWithOperations{}},
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attrs: admission.NewAttributesRecord(nil, nil, schema.GroupVersionKind{"apps", "v1", "Deployment"}, "ns", "name", schema.GroupVersionResource{"apps", "v1", "deployments"}, "", admission.Create, &metav1.CreateOptions{}, false, nil),
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expectCall: false,
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},
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{
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name: "invalid kind lookup",
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webhook: &v1beta1.Webhook{
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NamespaceSelector: &metav1.LabelSelector{},
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MatchPolicy: &equivalentMatch,
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Rules: []v1beta1.RuleWithOperations{{
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Operations: []v1beta1.OperationType{"*"},
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Rule: v1beta1.Rule{APIGroups: []string{"example.com"}, APIVersions: []string{"v1"}, Resources: []string{"widgets"}, Scope: &allScopes},
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}}},
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attrs: admission.NewAttributesRecord(nil, nil, schema.GroupVersionKind{"example.com", "v2", "Widget"}, "ns", "name", schema.GroupVersionResource{"example.com", "v2", "widgets"}, "", admission.Create, &metav1.CreateOptions{}, false, nil),
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expectCall: false,
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expectErr: "unknown kind",
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},
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{
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name: "wildcard rule, match as requested",
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webhook: &v1beta1.Webhook{
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NamespaceSelector: &metav1.LabelSelector{},
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Rules: []v1beta1.RuleWithOperations{{
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Operations: []v1beta1.OperationType{"*"},
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Rule: v1beta1.Rule{APIGroups: []string{"*"}, APIVersions: []string{"*"}, Resources: []string{"*"}, Scope: &allScopes},
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}}},
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attrs: admission.NewAttributesRecord(nil, nil, schema.GroupVersionKind{"apps", "v1", "Deployment"}, "ns", "name", schema.GroupVersionResource{"apps", "v1", "deployments"}, "", admission.Create, &metav1.CreateOptions{}, false, nil),
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expectCall: true,
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expectCallKind: schema.GroupVersionKind{"apps", "v1", "Deployment"},
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expectCallResource: schema.GroupVersionResource{"apps", "v1", "deployments"},
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expectCallSubresource: "",
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},
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{
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name: "specific rules, prefer exact match",
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webhook: &v1beta1.Webhook{
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NamespaceSelector: &metav1.LabelSelector{},
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Rules: []v1beta1.RuleWithOperations{{
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Operations: []v1beta1.OperationType{"*"},
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Rule: v1beta1.Rule{APIGroups: []string{"extensions"}, APIVersions: []string{"v1beta1"}, Resources: []string{"deployments"}, Scope: &allScopes},
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}, {
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Operations: []v1beta1.OperationType{"*"},
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Rule: v1beta1.Rule{APIGroups: []string{"apps"}, APIVersions: []string{"v1beta1"}, Resources: []string{"deployments"}, Scope: &allScopes},
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}, {
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Operations: []v1beta1.OperationType{"*"},
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Rule: v1beta1.Rule{APIGroups: []string{"apps"}, APIVersions: []string{"v1"}, Resources: []string{"deployments"}, Scope: &allScopes},
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}}},
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attrs: admission.NewAttributesRecord(nil, nil, schema.GroupVersionKind{"apps", "v1", "Deployment"}, "ns", "name", schema.GroupVersionResource{"apps", "v1", "deployments"}, "", admission.Create, &metav1.CreateOptions{}, false, nil),
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expectCall: true,
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expectCallKind: schema.GroupVersionKind{"apps", "v1", "Deployment"},
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expectCallResource: schema.GroupVersionResource{"apps", "v1", "deployments"},
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expectCallSubresource: "",
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},
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{
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name: "specific rules, match miss",
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webhook: &v1beta1.Webhook{
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NamespaceSelector: &metav1.LabelSelector{},
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Rules: []v1beta1.RuleWithOperations{{
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Operations: []v1beta1.OperationType{"*"},
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Rule: v1beta1.Rule{APIGroups: []string{"extensions"}, APIVersions: []string{"v1beta1"}, Resources: []string{"deployments"}, Scope: &allScopes},
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}, {
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Operations: []v1beta1.OperationType{"*"},
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Rule: v1beta1.Rule{APIGroups: []string{"apps"}, APIVersions: []string{"v1beta1"}, Resources: []string{"deployments"}, Scope: &allScopes},
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}}},
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attrs: admission.NewAttributesRecord(nil, nil, schema.GroupVersionKind{"apps", "v1", "Deployment"}, "ns", "name", schema.GroupVersionResource{"apps", "v1", "deployments"}, "", admission.Create, &metav1.CreateOptions{}, false, nil),
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expectCall: false,
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},
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{
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name: "specific rules, exact match miss",
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webhook: &v1beta1.Webhook{
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MatchPolicy: &exactMatch,
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NamespaceSelector: &metav1.LabelSelector{},
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Rules: []v1beta1.RuleWithOperations{{
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Operations: []v1beta1.OperationType{"*"},
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Rule: v1beta1.Rule{APIGroups: []string{"extensions"}, APIVersions: []string{"v1beta1"}, Resources: []string{"deployments"}, Scope: &allScopes},
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}, {
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Operations: []v1beta1.OperationType{"*"},
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Rule: v1beta1.Rule{APIGroups: []string{"apps"}, APIVersions: []string{"v1beta1"}, Resources: []string{"deployments"}, Scope: &allScopes},
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}}},
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attrs: admission.NewAttributesRecord(nil, nil, schema.GroupVersionKind{"apps", "v1", "Deployment"}, "ns", "name", schema.GroupVersionResource{"apps", "v1", "deployments"}, "", admission.Create, &metav1.CreateOptions{}, false, nil),
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expectCall: false,
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},
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{
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name: "specific rules, equivalent match, prefer extensions",
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webhook: &v1beta1.Webhook{
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MatchPolicy: &equivalentMatch,
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NamespaceSelector: &metav1.LabelSelector{},
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Rules: []v1beta1.RuleWithOperations{{
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Operations: []v1beta1.OperationType{"*"},
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Rule: v1beta1.Rule{APIGroups: []string{"extensions"}, APIVersions: []string{"v1beta1"}, Resources: []string{"deployments"}, Scope: &allScopes},
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}, {
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Operations: []v1beta1.OperationType{"*"},
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Rule: v1beta1.Rule{APIGroups: []string{"apps"}, APIVersions: []string{"v1beta1"}, Resources: []string{"deployments"}, Scope: &allScopes},
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}}},
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attrs: admission.NewAttributesRecord(nil, nil, schema.GroupVersionKind{"apps", "v1", "Deployment"}, "ns", "name", schema.GroupVersionResource{"apps", "v1", "deployments"}, "", admission.Create, &metav1.CreateOptions{}, false, nil),
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expectCall: true,
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expectCallKind: schema.GroupVersionKind{"extensions", "v1beta1", "Deployment"},
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expectCallResource: schema.GroupVersionResource{"extensions", "v1beta1", "deployments"},
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expectCallSubresource: "",
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},
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{
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name: "specific rules, equivalent match, prefer apps",
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webhook: &v1beta1.Webhook{
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MatchPolicy: &equivalentMatch,
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NamespaceSelector: &metav1.LabelSelector{},
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Rules: []v1beta1.RuleWithOperations{{
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Operations: []v1beta1.OperationType{"*"},
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Rule: v1beta1.Rule{APIGroups: []string{"apps"}, APIVersions: []string{"v1beta1"}, Resources: []string{"deployments"}, Scope: &allScopes},
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}, {
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Operations: []v1beta1.OperationType{"*"},
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Rule: v1beta1.Rule{APIGroups: []string{"extensions"}, APIVersions: []string{"v1beta1"}, Resources: []string{"deployments"}, Scope: &allScopes},
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}}},
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attrs: admission.NewAttributesRecord(nil, nil, schema.GroupVersionKind{"apps", "v1", "Deployment"}, "ns", "name", schema.GroupVersionResource{"apps", "v1", "deployments"}, "", admission.Create, &metav1.CreateOptions{}, false, nil),
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expectCall: true,
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expectCallKind: schema.GroupVersionKind{"apps", "v1beta1", "Deployment"},
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expectCallResource: schema.GroupVersionResource{"apps", "v1beta1", "deployments"},
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expectCallSubresource: "",
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},
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{
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name: "specific rules, subresource prefer exact match",
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webhook: &v1beta1.Webhook{
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NamespaceSelector: &metav1.LabelSelector{},
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Rules: []v1beta1.RuleWithOperations{{
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Operations: []v1beta1.OperationType{"*"},
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Rule: v1beta1.Rule{APIGroups: []string{"extensions"}, APIVersions: []string{"v1beta1"}, Resources: []string{"deployments", "deployments/scale"}, Scope: &allScopes},
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}, {
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Operations: []v1beta1.OperationType{"*"},
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Rule: v1beta1.Rule{APIGroups: []string{"apps"}, APIVersions: []string{"v1beta1"}, Resources: []string{"deployments", "deployments/scale"}, Scope: &allScopes},
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}, {
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Operations: []v1beta1.OperationType{"*"},
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Rule: v1beta1.Rule{APIGroups: []string{"apps"}, APIVersions: []string{"v1"}, Resources: []string{"deployments", "deployments/scale"}, Scope: &allScopes},
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}}},
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attrs: admission.NewAttributesRecord(nil, nil, schema.GroupVersionKind{"autoscaling", "v1", "Scale"}, "ns", "name", schema.GroupVersionResource{"apps", "v1", "deployments"}, "scale", admission.Create, &metav1.CreateOptions{}, false, nil),
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expectCall: true,
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expectCallKind: schema.GroupVersionKind{"autoscaling", "v1", "Scale"},
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expectCallResource: schema.GroupVersionResource{"apps", "v1", "deployments"},
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expectCallSubresource: "scale",
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},
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{
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name: "specific rules, subresource match miss",
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webhook: &v1beta1.Webhook{
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NamespaceSelector: &metav1.LabelSelector{},
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Rules: []v1beta1.RuleWithOperations{{
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Operations: []v1beta1.OperationType{"*"},
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Rule: v1beta1.Rule{APIGroups: []string{"extensions"}, APIVersions: []string{"v1beta1"}, Resources: []string{"deployments", "deployments/scale"}, Scope: &allScopes},
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}, {
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Operations: []v1beta1.OperationType{"*"},
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Rule: v1beta1.Rule{APIGroups: []string{"apps"}, APIVersions: []string{"v1beta1"}, Resources: []string{"deployments", "deployments/scale"}, Scope: &allScopes},
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}}},
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attrs: admission.NewAttributesRecord(nil, nil, schema.GroupVersionKind{"autoscaling", "v1", "Scale"}, "ns", "name", schema.GroupVersionResource{"apps", "v1", "deployments"}, "scale", admission.Create, &metav1.CreateOptions{}, false, nil),
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expectCall: false,
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},
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{
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name: "specific rules, subresource exact match miss",
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webhook: &v1beta1.Webhook{
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MatchPolicy: &exactMatch,
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NamespaceSelector: &metav1.LabelSelector{},
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Rules: []v1beta1.RuleWithOperations{{
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Operations: []v1beta1.OperationType{"*"},
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Rule: v1beta1.Rule{APIGroups: []string{"extensions"}, APIVersions: []string{"v1beta1"}, Resources: []string{"deployments", "deployments/scale"}, Scope: &allScopes},
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}, {
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Operations: []v1beta1.OperationType{"*"},
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Rule: v1beta1.Rule{APIGroups: []string{"apps"}, APIVersions: []string{"v1beta1"}, Resources: []string{"deployments", "deployments/scale"}, Scope: &allScopes},
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}}},
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attrs: admission.NewAttributesRecord(nil, nil, schema.GroupVersionKind{"autoscaling", "v1", "Scale"}, "ns", "name", schema.GroupVersionResource{"apps", "v1", "deployments"}, "scale", admission.Create, &metav1.CreateOptions{}, false, nil),
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expectCall: false,
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},
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{
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name: "specific rules, subresource equivalent match, prefer extensions",
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||||
webhook: &v1beta1.Webhook{
|
||||
MatchPolicy: &equivalentMatch,
|
||||
NamespaceSelector: &metav1.LabelSelector{},
|
||||
Rules: []v1beta1.RuleWithOperations{{
|
||||
Operations: []v1beta1.OperationType{"*"},
|
||||
Rule: v1beta1.Rule{APIGroups: []string{"extensions"}, APIVersions: []string{"v1beta1"}, Resources: []string{"deployments", "deployments/scale"}, Scope: &allScopes},
|
||||
}, {
|
||||
Operations: []v1beta1.OperationType{"*"},
|
||||
Rule: v1beta1.Rule{APIGroups: []string{"apps"}, APIVersions: []string{"v1beta1"}, Resources: []string{"deployments", "deployments/scale"}, Scope: &allScopes},
|
||||
}}},
|
||||
attrs: admission.NewAttributesRecord(nil, nil, schema.GroupVersionKind{"autoscaling", "v1", "Scale"}, "ns", "name", schema.GroupVersionResource{"apps", "v1", "deployments"}, "scale", admission.Create, &metav1.CreateOptions{}, false, nil),
|
||||
expectCall: true,
|
||||
expectCallKind: schema.GroupVersionKind{"extensions", "v1beta1", "Scale"},
|
||||
expectCallResource: schema.GroupVersionResource{"extensions", "v1beta1", "deployments"},
|
||||
expectCallSubresource: "scale",
|
||||
},
|
||||
{
|
||||
name: "specific rules, subresource equivalent match, prefer apps",
|
||||
webhook: &v1beta1.Webhook{
|
||||
MatchPolicy: &equivalentMatch,
|
||||
NamespaceSelector: &metav1.LabelSelector{},
|
||||
Rules: []v1beta1.RuleWithOperations{{
|
||||
Operations: []v1beta1.OperationType{"*"},
|
||||
Rule: v1beta1.Rule{APIGroups: []string{"apps"}, APIVersions: []string{"v1beta1"}, Resources: []string{"deployments", "deployments/scale"}, Scope: &allScopes},
|
||||
}, {
|
||||
Operations: []v1beta1.OperationType{"*"},
|
||||
Rule: v1beta1.Rule{APIGroups: []string{"extensions"}, APIVersions: []string{"v1beta1"}, Resources: []string{"deployments", "deployments/scale"}, Scope: &allScopes},
|
||||
}}},
|
||||
attrs: admission.NewAttributesRecord(nil, nil, schema.GroupVersionKind{"autoscaling", "v1", "Scale"}, "ns", "name", schema.GroupVersionResource{"apps", "v1", "deployments"}, "scale", admission.Create, &metav1.CreateOptions{}, false, nil),
|
||||
expectCall: true,
|
||||
expectCallKind: schema.GroupVersionKind{"apps", "v1beta1", "Scale"},
|
||||
expectCallResource: schema.GroupVersionResource{"apps", "v1beta1", "deployments"},
|
||||
expectCallSubresource: "scale",
|
||||
},
|
||||
}
|
||||
|
||||
for _, testcase := range testcases {
|
||||
t.Run(testcase.name, func(t *testing.T) {
|
||||
invocation, err := a.shouldCallHook(testcase.webhook, testcase.attrs, interfaces)
|
||||
if err != nil {
|
||||
if len(testcase.expectErr) == 0 {
|
||||
t.Fatal(err)
|
||||
}
|
||||
if !strings.Contains(err.Error(), testcase.expectErr) {
|
||||
t.Fatalf("expected error containing %q, got %s", testcase.expectErr, err.Error())
|
||||
}
|
||||
return
|
||||
} else if len(testcase.expectErr) > 0 {
|
||||
t.Fatalf("expected error %q, got no error and %#v", testcase.expectErr, invocation)
|
||||
}
|
||||
|
||||
if invocation == nil {
|
||||
if testcase.expectCall {
|
||||
t.Fatal("expected invocation, got nil")
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
if !testcase.expectCall {
|
||||
t.Fatal("unexpected invocation")
|
||||
}
|
||||
|
||||
if invocation.Kind != testcase.expectCallKind {
|
||||
t.Fatalf("expected %#v, got %#v", testcase.expectCallKind, invocation.Kind)
|
||||
}
|
||||
if invocation.Resource != testcase.expectCallResource {
|
||||
t.Fatalf("expected %#v, got %#v", testcase.expectCallResource, invocation.Resource)
|
||||
}
|
||||
if invocation.Subresource != testcase.expectCallSubresource {
|
||||
t.Fatalf("expected %#v, got %#v", testcase.expectCallSubresource, invocation.Subresource)
|
||||
}
|
||||
})
|
||||
}
|
||||
}
|
Loading…
Reference in New Issue
Block a user