| /* |
| Copyright 2017 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 configuration |
| |
| import ( |
| "fmt" |
| "reflect" |
| "sort" |
| |
| "github.com/golang/glog" |
| |
| "k8s.io/api/admissionregistration/v1alpha1" |
| "k8s.io/apimachinery/pkg/api/errors" |
| metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" |
| "k8s.io/apimachinery/pkg/runtime" |
| ) |
| |
| type InitializerConfigurationLister interface { |
| List(opts metav1.ListOptions) (*v1alpha1.InitializerConfigurationList, error) |
| } |
| |
| type InitializerConfigurationManager struct { |
| *poller |
| } |
| |
| func NewInitializerConfigurationManager(c InitializerConfigurationLister) *InitializerConfigurationManager { |
| getFn := func() (runtime.Object, error) { |
| list, err := c.List(metav1.ListOptions{}) |
| if err != nil { |
| if errors.IsNotFound(err) || errors.IsForbidden(err) { |
| glog.V(5).Infof("Initializers are disabled due to an error: %v", err) |
| return nil, ErrDisabled |
| } |
| return nil, err |
| } |
| return mergeInitializerConfigurations(list), nil |
| } |
| return &InitializerConfigurationManager{ |
| newPoller(getFn), |
| } |
| } |
| |
| // Initializers returns the merged InitializerConfiguration. |
| func (im *InitializerConfigurationManager) Initializers() (*v1alpha1.InitializerConfiguration, error) { |
| configuration, err := im.poller.configuration() |
| if err != nil { |
| return nil, err |
| } |
| initializerConfiguration, ok := configuration.(*v1alpha1.InitializerConfiguration) |
| if !ok { |
| return nil, fmt.Errorf("expected type %v, got type %v", reflect.TypeOf(initializerConfiguration), reflect.TypeOf(configuration)) |
| } |
| return initializerConfiguration, nil |
| } |
| |
| func (im *InitializerConfigurationManager) Run(stopCh <-chan struct{}) { |
| im.poller.Run(stopCh) |
| } |
| |
| func mergeInitializerConfigurations(initializerConfigurationList *v1alpha1.InitializerConfigurationList) *v1alpha1.InitializerConfiguration { |
| configurations := initializerConfigurationList.Items |
| sort.SliceStable(configurations, InitializerConfigurationSorter(configurations).ByName) |
| var ret v1alpha1.InitializerConfiguration |
| for _, c := range configurations { |
| ret.Initializers = append(ret.Initializers, c.Initializers...) |
| } |
| return &ret |
| } |
| |
| type InitializerConfigurationSorter []v1alpha1.InitializerConfiguration |
| |
| func (a InitializerConfigurationSorter) ByName(i, j int) bool { |
| return a[i].Name < a[j].Name |
| } |