mirror of
https://github.com/kubernetes-sigs/external-dns.git
synced 2025-10-31 02:31:00 +01:00
113 lines
3.3 KiB
Go
113 lines
3.3 KiB
Go
/*
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Copyright 2025 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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"fmt"
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"k8s.io/apimachinery/pkg/labels"
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coreinformers "k8s.io/client-go/informers/core/v1"
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"sigs.k8s.io/external-dns/endpoint"
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)
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// EndpointsForHostname returns the endpoint objects for each host-target combination.
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func EndpointsForHostname(hostname string, targets endpoint.Targets, ttl endpoint.TTL, providerSpecific endpoint.ProviderSpecific, setIdentifier string, resource string) []*endpoint.Endpoint {
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var (
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endpoints []*endpoint.Endpoint
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aTargets endpoint.Targets
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aaaaTargets endpoint.Targets
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cnameTargets endpoint.Targets
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)
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for _, t := range targets {
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switch suitableType(t) {
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case endpoint.RecordTypeA:
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aTargets = append(aTargets, t)
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case endpoint.RecordTypeAAAA:
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aaaaTargets = append(aaaaTargets, t)
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default:
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cnameTargets = append(cnameTargets, t)
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}
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}
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if len(aTargets) > 0 {
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epA := endpoint.NewEndpointWithTTL(hostname, endpoint.RecordTypeA, ttl, aTargets...)
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if epA != nil {
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epA.ProviderSpecific = providerSpecific
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epA.SetIdentifier = setIdentifier
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if resource != "" {
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epA.Labels[endpoint.ResourceLabelKey] = resource
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}
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endpoints = append(endpoints, epA)
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}
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}
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if len(aaaaTargets) > 0 {
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epAAAA := endpoint.NewEndpointWithTTL(hostname, endpoint.RecordTypeAAAA, ttl, aaaaTargets...)
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if epAAAA != nil {
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epAAAA.ProviderSpecific = providerSpecific
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epAAAA.SetIdentifier = setIdentifier
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if resource != "" {
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epAAAA.Labels[endpoint.ResourceLabelKey] = resource
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}
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endpoints = append(endpoints, epAAAA)
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}
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}
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if len(cnameTargets) > 0 {
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epCNAME := endpoint.NewEndpointWithTTL(hostname, endpoint.RecordTypeCNAME, ttl, cnameTargets...)
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if epCNAME != nil {
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epCNAME.ProviderSpecific = providerSpecific
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epCNAME.SetIdentifier = setIdentifier
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if resource != "" {
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epCNAME.Labels[endpoint.ResourceLabelKey] = resource
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}
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endpoints = append(endpoints, epCNAME)
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}
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}
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return endpoints
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}
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func EndpointTargetsFromServices(svcInformer coreinformers.ServiceInformer, namespace string, selector map[string]string) (endpoint.Targets, error) {
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targets := endpoint.Targets{}
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services, err := svcInformer.Lister().Services(namespace).List(labels.Everything())
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if err != nil {
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return nil, fmt.Errorf("failed to list labels for services in namespace %q: %w", namespace, err)
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}
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for _, service := range services {
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if !MatchesServiceSelector(selector, service.Spec.Selector) {
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continue
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}
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if len(service.Spec.ExternalIPs) > 0 {
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targets = append(targets, service.Spec.ExternalIPs...)
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continue
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}
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for _, lb := range service.Status.LoadBalancer.Ingress {
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if lb.IP != "" {
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targets = append(targets, lb.IP)
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} else if lb.Hostname != "" {
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targets = append(targets, lb.Hostname)
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}
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}
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}
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return targets, nil
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}
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