mirror of
https://github.com/kubernetes-sigs/external-dns.git
synced 2025-10-31 18:50:59 +01:00
83 lines
2.7 KiB
Go
83 lines
2.7 KiB
Go
/*
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Copyright 2017 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 source
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import (
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"context"
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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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"k8s.io/apimachinery/pkg/runtime"
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"sigs.k8s.io/external-dns/endpoint"
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"sigs.k8s.io/external-dns/source/annotations"
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)
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const (
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controllerAnnotationKey = annotations.ControllerKey
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hostnameAnnotationKey = annotations.HostnameKey
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accessAnnotationKey = annotations.AccessKey
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endpointsTypeAnnotationKey = annotations.EndpointsTypeKey
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targetAnnotationKey = annotations.TargetKey
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ttlAnnotationKey = annotations.TtlKey
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aliasAnnotationKey = annotations.AliasKey
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ingressHostnameSourceKey = annotations.IngressHostnameSourceKey
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controllerAnnotationValue = annotations.ControllerValue
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internalHostnameAnnotationKey = annotations.InternalHostnameKey
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EndpointsTypeNodeExternalIP = "NodeExternalIP"
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EndpointsTypeHostIP = "HostIP"
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)
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// Source defines the interface Endpoint sources should implement.
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type Source interface {
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Endpoints(ctx context.Context) ([]*endpoint.Endpoint, error)
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// AddEventHandler adds an event handler that should be triggered if something in source changes
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AddEventHandler(context.Context, func())
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}
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type kubeObject interface {
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runtime.Object
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metav1.Object
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}
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func getAccessFromAnnotations(input map[string]string) string {
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return input[accessAnnotationKey]
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}
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func getEndpointsTypeFromAnnotations(annotations map[string]string) string {
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return annotations[endpointsTypeAnnotationKey]
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}
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func getLabelSelector(annotationFilter string) (labels.Selector, error) {
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labelSelector, err := metav1.ParseToLabelSelector(annotationFilter)
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if err != nil {
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return nil, err
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}
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return metav1.LabelSelectorAsSelector(labelSelector)
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}
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func matchLabelSelector(selector labels.Selector, srcAnnotations map[string]string) bool {
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return selector.Matches(labels.Set(srcAnnotations))
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}
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type eventHandlerFunc func()
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func (fn eventHandlerFunc) OnAdd(obj interface{}, isInInitialList bool) { fn() }
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func (fn eventHandlerFunc) OnUpdate(oldObj, newObj interface{}) { fn() }
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func (fn eventHandlerFunc) OnDelete(obj interface{}) { fn() }
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