mirror of
https://github.com/kubernetes-sigs/external-dns.git
synced 2025-11-04 04:31:00 +01:00
101 lines
3.0 KiB
Go
101 lines
3.0 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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"strings"
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v1 "k8s.io/api/core/v1"
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"sigs.k8s.io/external-dns/endpoint"
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)
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const (
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mateAnnotationKey = "zalando.org/dnsname"
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moleculeAnnotationKey = "domainName"
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)
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// legacyEndpointsFromService tries to retrieve Endpoints from Services
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// annotated with legacy annotations.
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func legacyEndpointsFromService(svc *v1.Service, compatibility string) []*endpoint.Endpoint {
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switch compatibility {
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case "mate":
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return legacyEndpointsFromMateService(svc)
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case "molecule":
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return legacyEndpointsFromMoleculeService(svc)
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}
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return []*endpoint.Endpoint{}
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}
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// legacyEndpointsFromMateService tries to retrieve Endpoints from Services
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// annotated with Mate's annotation semantics.
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func legacyEndpointsFromMateService(svc *v1.Service) []*endpoint.Endpoint {
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var endpoints []*endpoint.Endpoint
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// Get the desired hostname of the service from the annotation.
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hostname, exists := svc.Annotations[mateAnnotationKey]
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if !exists {
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return nil
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}
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// Create a corresponding endpoint for each configured external entrypoint.
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for _, lb := range svc.Status.LoadBalancer.Ingress {
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if lb.IP != "" {
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endpoints = append(endpoints, endpoint.NewEndpoint(hostname, endpoint.RecordTypeA, lb.IP))
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}
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if lb.Hostname != "" {
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endpoints = append(endpoints, endpoint.NewEndpoint(hostname, endpoint.RecordTypeCNAME, lb.Hostname))
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}
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}
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return endpoints
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}
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// legacyEndpointsFromMoleculeService tries to retrieve Endpoints from Services
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// annotated with Molecule Software's annotation semantics.
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func legacyEndpointsFromMoleculeService(svc *v1.Service) []*endpoint.Endpoint {
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var endpoints []*endpoint.Endpoint
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// Check that the Service opted-in to being processed.
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if svc.Labels["dns"] != "route53" {
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return nil
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}
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// Get the desired hostname of the service from the annotation.
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hostnameAnnotation, exists := svc.Annotations[moleculeAnnotationKey]
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if !exists {
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return nil
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}
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hostnameList := strings.Split(strings.Replace(hostnameAnnotation, " ", "", -1), ",")
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for _, hostname := range hostnameList {
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// Create a corresponding endpoint for each configured external entrypoint.
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for _, lb := range svc.Status.LoadBalancer.Ingress {
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if lb.IP != "" {
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endpoints = append(endpoints, endpoint.NewEndpoint(hostname, endpoint.RecordTypeA, lb.IP))
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}
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if lb.Hostname != "" {
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endpoints = append(endpoints, endpoint.NewEndpoint(hostname, endpoint.RecordTypeCNAME, lb.Hostname))
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}
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}
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}
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return endpoints
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}
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