mirror of
https://github.com/kubernetes-sigs/external-dns.git
synced 2025-08-05 17:16:59 +02:00
86 lines
2.7 KiB
Go
86 lines
2.7 KiB
Go
/*
|
|
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 wrappers
|
|
|
|
import (
|
|
"context"
|
|
"reflect"
|
|
"strings"
|
|
|
|
log "github.com/sirupsen/logrus"
|
|
|
|
"sigs.k8s.io/external-dns/endpoint"
|
|
"sigs.k8s.io/external-dns/source"
|
|
)
|
|
|
|
// multiSource is a Source that merges the endpoints of its nested Sources.
|
|
type multiSource struct {
|
|
children []source.Source
|
|
defaultTargets []string
|
|
forceDefaultTargets bool
|
|
}
|
|
|
|
// Endpoints collects endpoints of all nested Sources and returns them in a single slice.
|
|
func (ms *multiSource) Endpoints(ctx context.Context) ([]*endpoint.Endpoint, error) {
|
|
log.Debugf("multiSource: collecting endpoints from %d child sources and removing duplicates", len(ms.children))
|
|
result := []*endpoint.Endpoint{}
|
|
hasDefaultTargets := len(ms.defaultTargets) > 0
|
|
|
|
for _, s := range ms.children {
|
|
endpoints, err := s.Endpoints(ctx)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
if !hasDefaultTargets {
|
|
result = append(result, endpoints...)
|
|
continue
|
|
}
|
|
|
|
for _, ep := range endpoints {
|
|
hasSourceTargets := len(ep.Targets) > 0
|
|
|
|
if ms.forceDefaultTargets || !hasSourceTargets {
|
|
eps := source.EndpointsForHostname(ep.DNSName, ms.defaultTargets, ep.RecordTTL, ep.ProviderSpecific, ep.SetIdentifier, "")
|
|
for _, e := range eps {
|
|
e.Labels = ep.Labels
|
|
}
|
|
result = append(result, eps...)
|
|
continue
|
|
}
|
|
|
|
log.Warnf("Source provided targets for %q (%s), ignoring default targets [%s] due to new behavior. Use --force-default-targets to revert to old behavior.", ep.DNSName, ep.RecordType, strings.Join(ms.defaultTargets, ", "))
|
|
result = append(result, ep)
|
|
}
|
|
}
|
|
|
|
return result, nil
|
|
}
|
|
|
|
func (ms *multiSource) AddEventHandler(ctx context.Context, handler func()) {
|
|
log.Debugf("multiSource: adding event handler for %d child sources", len(ms.children))
|
|
for _, s := range ms.children {
|
|
log.Debugf("multiSource: adding event handler for child %q", reflect.TypeOf(s).String())
|
|
s.AddEventHandler(ctx, handler)
|
|
}
|
|
}
|
|
|
|
// NewMultiSource creates a new multiSource.
|
|
func NewMultiSource(children []source.Source, defaultTargets []string, forceDefaultTargets bool) source.Source {
|
|
return &multiSource{children: children, defaultTargets: defaultTargets, forceDefaultTargets: forceDefaultTargets}
|
|
}
|