mirror of
https://github.com/kubernetes-sigs/external-dns.git
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b453ea1665
* chore(wrapper): centralized endpoint target validation Signed-off-by: ivan katliarchuk <ivan.katliarchuk@gmail.com> * chore(wrapper): centralized endpoint target validation Signed-off-by: ivan katliarchuk <ivan.katliarchuk@gmail.com> * chore(wrapper): centralized endpoint target validation Signed-off-by: ivan katliarchuk <ivan.katliarchuk@gmail.com> --------- Signed-off-by: ivan katliarchuk <ivan.katliarchuk@gmail.com>
83 lines
2.3 KiB
Go
83 lines
2.3 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 wrappers
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import (
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"context"
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"strings"
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log "github.com/sirupsen/logrus"
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"sigs.k8s.io/external-dns/endpoint"
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"sigs.k8s.io/external-dns/source"
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)
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// dedupSource is a Source that removes duplicate endpoints from its wrapped source.
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type dedupSource struct {
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source source.Source
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}
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// NewDedupSource creates a new dedupSource wrapping the provided Source.
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func NewDedupSource(source source.Source) source.Source {
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return &dedupSource{source: source}
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}
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// Endpoints collects endpoints from its wrapped source and returns them without duplicates.
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func (ms *dedupSource) Endpoints(ctx context.Context) ([]*endpoint.Endpoint, error) {
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log.Debug("dedupSource: collecting endpoints and removing duplicates")
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result := make([]*endpoint.Endpoint, 0)
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collected := make(map[string]struct{})
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endpoints, err := ms.source.Endpoints(ctx)
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if err != nil {
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return nil, err
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}
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for _, ep := range endpoints {
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if ep == nil {
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continue
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}
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// validate endpoint before normalization
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if ok := ep.CheckEndpoint(); !ok {
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log.Warnf("Skipping endpoint [%s:%s] due to invalid configuration [%s:%s]", ep.SetIdentifier, ep.DNSName, ep.RecordType, strings.Join(ep.Targets, ","))
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continue
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}
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if len(ep.Targets) > 1 {
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ep.Targets = endpoint.NewTargets(ep.Targets...)
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}
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identifier := strings.Join([]string{ep.RecordType, ep.DNSName, ep.SetIdentifier, ep.Targets.String()}, "/")
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if _, ok := collected[identifier]; ok {
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log.Debugf("Removing duplicate endpoint %s", ep)
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continue
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}
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collected[identifier] = struct{}{}
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result = append(result, ep)
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}
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return result, nil
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}
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func (ms *dedupSource) AddEventHandler(ctx context.Context, handler func()) {
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log.Debug("dedupSource: adding event handler")
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ms.source.AddEventHandler(ctx, handler)
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}
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