k8s.io/kubernetes@v1.29.3/pkg/apis/admissionregistration/util.go (about)

     1  /*
     2  Copyright 2023 The Kubernetes Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package admissionregistration
    18  
    19  import (
    20  	genericfeatures "k8s.io/apiserver/pkg/features"
    21  	utilfeature "k8s.io/apiserver/pkg/util/feature"
    22  )
    23  
    24  // DropDisabledMutatingWebhookConfigurationFields removes disabled fields from the mutatingWebhookConfiguration metadata and spec.
    25  // This should be called from PrepareForCreate/PrepareForUpdate for all resources containing a mutatingWebhookConfiguration
    26  func DropDisabledMutatingWebhookConfigurationFields(mutatingWebhookConfiguration, oldMutatingWebhookConfiguration *MutatingWebhookConfiguration) {
    27  	if !utilfeature.DefaultFeatureGate.Enabled(genericfeatures.AdmissionWebhookMatchConditions) && !matchConditionsInUseMutatingWebhook(oldMutatingWebhookConfiguration) {
    28  		for i := range mutatingWebhookConfiguration.Webhooks {
    29  			mutatingWebhookConfiguration.Webhooks[i].MatchConditions = nil
    30  		}
    31  	}
    32  }
    33  
    34  func matchConditionsInUseMutatingWebhook(mutatingWebhookConfiguration *MutatingWebhookConfiguration) bool {
    35  	if mutatingWebhookConfiguration == nil {
    36  		return false
    37  	}
    38  	for _, webhook := range mutatingWebhookConfiguration.Webhooks {
    39  		if len(webhook.MatchConditions) != 0 {
    40  			return true
    41  		}
    42  	}
    43  	return false
    44  }
    45  
    46  // DropDisabledValidatingWebhookConfigurationFields removes disabled fields from the validatingWebhookConfiguration metadata and spec.
    47  // This should be called from PrepareForCreate/PrepareForUpdate for all resources containing a validatingWebhookConfiguration
    48  func DropDisabledValidatingWebhookConfigurationFields(validatingWebhookConfiguration, oldValidatingWebhookConfiguration *ValidatingWebhookConfiguration) {
    49  	if !utilfeature.DefaultFeatureGate.Enabled(genericfeatures.AdmissionWebhookMatchConditions) && !matchConditionsInUseValidatingWebhook(oldValidatingWebhookConfiguration) {
    50  		for i := range validatingWebhookConfiguration.Webhooks {
    51  			validatingWebhookConfiguration.Webhooks[i].MatchConditions = nil
    52  		}
    53  	}
    54  }
    55  
    56  func matchConditionsInUseValidatingWebhook(validatingWebhookConfiguration *ValidatingWebhookConfiguration) bool {
    57  	if validatingWebhookConfiguration == nil {
    58  		return false
    59  	}
    60  	for _, webhook := range validatingWebhookConfiguration.Webhooks {
    61  		if len(webhook.MatchConditions) != 0 {
    62  			return true
    63  		}
    64  	}
    65  	return false
    66  }