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https://github.com/kubernetes-sigs/external-dns.git
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83e1bcf39d
* refactor(source): inline label selector matching, remove MatchesServiceSelector Signed-off-by: ivan katliarchuk <ivan.katliarchuk@gmail.com> * refactor(source): inline label selector matching, remove MatchesServiceSelector Signed-off-by: ivan katliarchuk <ivan.katliarchuk@gmail.com> --------- Signed-off-by: ivan katliarchuk <ivan.katliarchuk@gmail.com>
59 lines
1.9 KiB
Go
59 lines
1.9 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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// EndpointTargetsFromServices retrieves endpoint targets from services in a given namespace
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// that match the specified selector. It returns external IPs or load balancer addresses.
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//
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// TODO: add support for service.Spec.Ports (type NodePort) and service.Spec.ClusterIPs (type ClusterIP)
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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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labelsSelector := labels.SelectorFromSet(selector)
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for _, service := range services {
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if !labelsSelector.Matches(labels.Set(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 endpoint.NewTargets(targets...), nil
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}
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