initializer.go

Documentation: k8s.io/kubernetes/pkg/kubeapiserver/admission

     1  /*
     2  Copyright 2016 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 admission
    18  
    19  import (
    20  	"k8s.io/apimachinery/pkg/runtime/schema"
    21  	"k8s.io/apiserver/pkg/admission"
    22  	"k8s.io/apiserver/pkg/admission/initializer"
    23  	quota "k8s.io/apiserver/pkg/quota/v1"
    24  )
    25  
    26  // TODO add a `WantsToRun` which takes a stopCh.  Might make it generic.
    27  
    28  // WantsCloudConfig defines a function which sets CloudConfig for admission plugins that need it.
    29  type WantsCloudConfig interface {
    30  	SetCloudConfig([]byte)
    31  }
    32  
    33  // PluginInitializer is used for initialization of the Kubernetes specific admission plugins.
    34  type PluginInitializer struct {
    35  	cloudConfig                []byte
    36  	quotaConfiguration         quota.Configuration
    37  	excludedAdmissionResources []schema.GroupResource
    38  }
    39  
    40  var _ admission.PluginInitializer = &PluginInitializer{}
    41  
    42  // NewPluginInitializer constructs new instance of PluginInitializer
    43  // TODO: switch these parameters to use the builder pattern or just make them
    44  // all public, this construction method is pointless boilerplate.
    45  func NewPluginInitializer(
    46  	cloudConfig []byte,
    47  	quotaConfiguration quota.Configuration,
    48  	excludedAdmissionResources []schema.GroupResource,
    49  ) *PluginInitializer {
    50  	return &PluginInitializer{
    51  		cloudConfig:                cloudConfig,
    52  		quotaConfiguration:         quotaConfiguration,
    53  		excludedAdmissionResources: excludedAdmissionResources,
    54  	}
    55  }
    56  
    57  // Initialize checks the initialization interfaces implemented by each plugin
    58  // and provide the appropriate initialization data
    59  func (i *PluginInitializer) Initialize(plugin admission.Interface) {
    60  	if wants, ok := plugin.(WantsCloudConfig); ok {
    61  		wants.SetCloudConfig(i.cloudConfig)
    62  	}
    63  
    64  	if wants, ok := plugin.(initializer.WantsQuotaConfiguration); ok {
    65  		wants.SetQuotaConfiguration(i.quotaConfiguration)
    66  	}
    67  
    68  	if wants, ok := plugin.(initializer.WantsExcludedAdmissionResources); ok {
    69  		wants.SetExcludedAdmissionResources(i.excludedAdmissionResources)
    70  	}
    71  }
    72
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