mirror of
https://github.com/kubernetes-sigs/external-dns.git
synced 2025-08-06 09:36:58 +02:00
28f9e9c06e
* BREAKING CHANGE: Improve default targets management * fix: Remove old test case * fix: Test confirming legacy mode allows empty CRD targets * fix: Remove comments * fix: Move flag definition closer to detault-targets * fix: Initial merge adaptation * fix: Improved legacy needs a chance to work with empty CRD list * fix: Code coverage and dead code * fix: Simpler Endpoints logic * fix: Flag description * feat: Add tutorial * fix: Improve linting * fix: Improve linting * fix: Import linting
81 lines
2.4 KiB
Go
81 lines
2.4 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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"strings"
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"sigs.k8s.io/external-dns/endpoint"
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log "github.com/sirupsen/logrus"
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)
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// multiSource is a Source that merges the endpoints of its nested Sources.
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type multiSource struct {
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children []Source
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defaultTargets []string
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forceDefaultTargets bool
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}
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// Endpoints collects endpoints of all nested Sources and returns them in a single slice.
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func (ms *multiSource) Endpoints(ctx context.Context) ([]*endpoint.Endpoint, error) {
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result := []*endpoint.Endpoint{}
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hasDefaultTargets := len(ms.defaultTargets) > 0
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for _, s := range ms.children {
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endpoints, err := s.Endpoints(ctx)
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if err != nil {
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return nil, err
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}
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if !hasDefaultTargets {
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result = append(result, endpoints...)
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continue
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}
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for i := range endpoints {
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hasSourceTargets := len(endpoints[i].Targets) > 0
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if ms.forceDefaultTargets || !hasSourceTargets {
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eps := endpointsForHostname(endpoints[i].DNSName, ms.defaultTargets, endpoints[i].RecordTTL, endpoints[i].ProviderSpecific, endpoints[i].SetIdentifier, "")
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for _, ep := range eps {
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ep.Labels = endpoints[i].Labels
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}
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result = append(result, eps...)
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continue
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}
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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.", endpoints[i].DNSName, endpoints[i].RecordType, strings.Join(ms.defaultTargets, ", "))
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result = append(result, endpoints[i])
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}
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}
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return result, nil
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}
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func (ms *multiSource) AddEventHandler(ctx context.Context, handler func()) {
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for _, s := range ms.children {
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s.AddEventHandler(ctx, handler)
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}
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}
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// NewMultiSource creates a new multiSource.
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func NewMultiSource(children []Source, defaultTargets []string, forceDefaultTargets bool) Source {
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return &multiSource{children: children, defaultTargets: defaultTargets, forceDefaultTargets: forceDefaultTargets}
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}
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