298 lines
9.7 KiB
Go
298 lines
9.7 KiB
Go
/*
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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 webhook
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import (
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"sync"
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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/labels"
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webhookutil "k8s.io/apiserver/pkg/util/webhook"
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"k8s.io/client-go/rest"
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)
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// WebhookAccessor provides a common interface to both mutating and validating webhook types.
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type WebhookAccessor interface {
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// GetUID gets a string that uniquely identifies the webhook.
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GetUID() string
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// GetConfigurationName gets the name of the webhook configuration that owns this webhook.
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GetConfigurationName() string
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// GetRESTClient gets the webhook client
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GetRESTClient(clientManager *webhookutil.ClientManager) (*rest.RESTClient, error)
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// GetParsedNamespaceSelector gets the webhook NamespaceSelector field.
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GetParsedNamespaceSelector() (labels.Selector, error)
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// GetParsedObjectSelector gets the webhook ObjectSelector field.
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GetParsedObjectSelector() (labels.Selector, error)
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// GetName gets the webhook Name field. Note that the name is scoped to the webhook
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// configuration and does not provide a globally unique identity, if a unique identity is
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// needed, use GetUID.
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GetName() string
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// GetClientConfig gets the webhook ClientConfig field.
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GetClientConfig() v1beta1.WebhookClientConfig
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// GetRules gets the webhook Rules field.
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GetRules() []v1beta1.RuleWithOperations
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// GetFailurePolicy gets the webhook FailurePolicy field.
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GetFailurePolicy() *v1beta1.FailurePolicyType
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// GetMatchPolicy gets the webhook MatchPolicy field.
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GetMatchPolicy() *v1beta1.MatchPolicyType
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// GetNamespaceSelector gets the webhook NamespaceSelector field.
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GetNamespaceSelector() *metav1.LabelSelector
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// GetObjectSelector gets the webhook ObjectSelector field.
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GetObjectSelector() *metav1.LabelSelector
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// GetSideEffects gets the webhook SideEffects field.
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GetSideEffects() *v1beta1.SideEffectClass
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// GetTimeoutSeconds gets the webhook TimeoutSeconds field.
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GetTimeoutSeconds() *int32
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// GetAdmissionReviewVersions gets the webhook AdmissionReviewVersions field.
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GetAdmissionReviewVersions() []string
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// GetMutatingWebhook if the accessor contains a MutatingWebhook, returns it and true, else returns false.
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GetMutatingWebhook() (*v1beta1.MutatingWebhook, bool)
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// GetValidatingWebhook if the accessor contains a ValidatingWebhook, returns it and true, else returns false.
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GetValidatingWebhook() (*v1beta1.ValidatingWebhook, bool)
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}
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// NewMutatingWebhookAccessor creates an accessor for a MutatingWebhook.
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func NewMutatingWebhookAccessor(uid, configurationName string, h *v1beta1.MutatingWebhook) WebhookAccessor {
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return &mutatingWebhookAccessor{uid: uid, configurationName: configurationName, MutatingWebhook: h}
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}
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type mutatingWebhookAccessor struct {
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*v1beta1.MutatingWebhook
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uid string
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configurationName string
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initObjectSelector sync.Once
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objectSelector labels.Selector
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objectSelectorErr error
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initNamespaceSelector sync.Once
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namespaceSelector labels.Selector
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namespaceSelectorErr error
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initClient sync.Once
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client *rest.RESTClient
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clientErr error
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}
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func (m *mutatingWebhookAccessor) GetUID() string {
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return m.uid
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}
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func (m *mutatingWebhookAccessor) GetConfigurationName() string {
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return m.configurationName
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}
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func (m *mutatingWebhookAccessor) GetRESTClient(clientManager *webhookutil.ClientManager) (*rest.RESTClient, error) {
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m.initClient.Do(func() {
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m.client, m.clientErr = clientManager.HookClient(hookClientConfigForWebhook(m))
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})
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return m.client, m.clientErr
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}
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func (m *mutatingWebhookAccessor) GetParsedNamespaceSelector() (labels.Selector, error) {
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m.initNamespaceSelector.Do(func() {
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m.namespaceSelector, m.namespaceSelectorErr = metav1.LabelSelectorAsSelector(m.NamespaceSelector)
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})
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return m.namespaceSelector, m.namespaceSelectorErr
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}
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func (m *mutatingWebhookAccessor) GetParsedObjectSelector() (labels.Selector, error) {
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m.initObjectSelector.Do(func() {
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m.objectSelector, m.objectSelectorErr = metav1.LabelSelectorAsSelector(m.ObjectSelector)
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})
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return m.objectSelector, m.objectSelectorErr
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}
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func (m *mutatingWebhookAccessor) GetName() string {
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return m.Name
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}
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func (m *mutatingWebhookAccessor) GetClientConfig() v1beta1.WebhookClientConfig {
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return m.ClientConfig
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}
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func (m *mutatingWebhookAccessor) GetRules() []v1beta1.RuleWithOperations {
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return m.Rules
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}
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func (m *mutatingWebhookAccessor) GetFailurePolicy() *v1beta1.FailurePolicyType {
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return m.FailurePolicy
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}
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func (m *mutatingWebhookAccessor) GetMatchPolicy() *v1beta1.MatchPolicyType {
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return m.MatchPolicy
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}
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func (m *mutatingWebhookAccessor) GetNamespaceSelector() *metav1.LabelSelector {
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return m.NamespaceSelector
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}
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func (m *mutatingWebhookAccessor) GetObjectSelector() *metav1.LabelSelector {
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return m.ObjectSelector
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}
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func (m *mutatingWebhookAccessor) GetSideEffects() *v1beta1.SideEffectClass {
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return m.SideEffects
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}
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func (m *mutatingWebhookAccessor) GetTimeoutSeconds() *int32 {
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return m.TimeoutSeconds
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}
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func (m *mutatingWebhookAccessor) GetAdmissionReviewVersions() []string {
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return m.AdmissionReviewVersions
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}
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func (m *mutatingWebhookAccessor) GetMutatingWebhook() (*v1beta1.MutatingWebhook, bool) {
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return m.MutatingWebhook, true
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}
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func (m *mutatingWebhookAccessor) GetValidatingWebhook() (*v1beta1.ValidatingWebhook, bool) {
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return nil, false
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}
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// NewValidatingWebhookAccessor creates an accessor for a ValidatingWebhook.
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func NewValidatingWebhookAccessor(uid, configurationName string, h *v1beta1.ValidatingWebhook) WebhookAccessor {
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return &validatingWebhookAccessor{uid: uid, configurationName: configurationName, ValidatingWebhook: h}
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}
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type validatingWebhookAccessor struct {
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*v1beta1.ValidatingWebhook
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uid string
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configurationName string
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initObjectSelector sync.Once
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objectSelector labels.Selector
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objectSelectorErr error
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initNamespaceSelector sync.Once
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namespaceSelector labels.Selector
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namespaceSelectorErr error
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initClient sync.Once
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client *rest.RESTClient
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clientErr error
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}
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func (v *validatingWebhookAccessor) GetUID() string {
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return v.uid
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}
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func (v *validatingWebhookAccessor) GetConfigurationName() string {
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return v.configurationName
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}
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func (v *validatingWebhookAccessor) GetRESTClient(clientManager *webhookutil.ClientManager) (*rest.RESTClient, error) {
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v.initClient.Do(func() {
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v.client, v.clientErr = clientManager.HookClient(hookClientConfigForWebhook(v))
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})
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return v.client, v.clientErr
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}
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func (v *validatingWebhookAccessor) GetParsedNamespaceSelector() (labels.Selector, error) {
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v.initNamespaceSelector.Do(func() {
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v.namespaceSelector, v.namespaceSelectorErr = metav1.LabelSelectorAsSelector(v.NamespaceSelector)
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})
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return v.namespaceSelector, v.namespaceSelectorErr
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}
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func (v *validatingWebhookAccessor) GetParsedObjectSelector() (labels.Selector, error) {
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v.initObjectSelector.Do(func() {
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v.objectSelector, v.objectSelectorErr = metav1.LabelSelectorAsSelector(v.ObjectSelector)
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})
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return v.objectSelector, v.objectSelectorErr
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}
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func (v *validatingWebhookAccessor) GetName() string {
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return v.Name
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}
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func (v *validatingWebhookAccessor) GetClientConfig() v1beta1.WebhookClientConfig {
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return v.ClientConfig
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}
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func (v *validatingWebhookAccessor) GetRules() []v1beta1.RuleWithOperations {
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return v.Rules
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}
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func (v *validatingWebhookAccessor) GetFailurePolicy() *v1beta1.FailurePolicyType {
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return v.FailurePolicy
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}
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func (v *validatingWebhookAccessor) GetMatchPolicy() *v1beta1.MatchPolicyType {
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return v.MatchPolicy
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}
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func (v *validatingWebhookAccessor) GetNamespaceSelector() *metav1.LabelSelector {
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return v.NamespaceSelector
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}
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func (v *validatingWebhookAccessor) GetObjectSelector() *metav1.LabelSelector {
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return v.ObjectSelector
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}
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func (v *validatingWebhookAccessor) GetSideEffects() *v1beta1.SideEffectClass {
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return v.SideEffects
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}
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func (v *validatingWebhookAccessor) GetTimeoutSeconds() *int32 {
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return v.TimeoutSeconds
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}
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func (v *validatingWebhookAccessor) GetAdmissionReviewVersions() []string {
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return v.AdmissionReviewVersions
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}
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func (v *validatingWebhookAccessor) GetMutatingWebhook() (*v1beta1.MutatingWebhook, bool) {
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return nil, false
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}
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func (v *validatingWebhookAccessor) GetValidatingWebhook() (*v1beta1.ValidatingWebhook, bool) {
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return v.ValidatingWebhook, true
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}
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// hookClientConfigForWebhook construct a webhookutil.ClientConfig using a WebhookAccessor to access
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// v1beta1.MutatingWebhook and v1beta1.ValidatingWebhook API objects. webhookutil.ClientConfig is used
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// to create a HookClient and the purpose of the config struct is to share that with other packages
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// that need to create a HookClient.
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func hookClientConfigForWebhook(w WebhookAccessor) webhookutil.ClientConfig {
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ret := webhookutil.ClientConfig{Name: w.GetName(), CABundle: w.GetClientConfig().CABundle}
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if w.GetClientConfig().URL != nil {
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ret.URL = *w.GetClientConfig().URL
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}
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if w.GetClientConfig().Service != nil {
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ret.Service = &webhookutil.ClientConfigService{
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Name: w.GetClientConfig().Service.Name,
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Namespace: w.GetClientConfig().Service.Namespace,
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}
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if w.GetClientConfig().Service.Port != nil {
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ret.Service.Port = *w.GetClientConfig().Service.Port
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} else {
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ret.Service.Port = 443
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}
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if w.GetClientConfig().Service.Path != nil {
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ret.Service.Path = *w.GetClientConfig().Service.Path
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}
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}
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return ret
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}
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