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https://github.com/kubernetes-sigs/external-dns.git
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aa2a488b53
* refactore(source): move EndpointsForHostname to endpoint package Signed-off-by: ivan katliarchuk <ivan.katliarchuk@gmail.com> * refactore(source): move EndpointsForHostname to endpoint package Signed-off-by: ivan katliarchuk <ivan.katliarchuk@gmail.com> * refactore(source): move EndpointsForHostname to endpoint package Signed-off-by: ivan katliarchuk <ivan.katliarchuk@gmail.com> --------- Signed-off-by: ivan katliarchuk <ivan.katliarchuk@gmail.com>
87 lines
2.4 KiB
Go
87 lines
2.4 KiB
Go
/*
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Copyright 2026 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 endpoint
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import (
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"net/netip"
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log "github.com/sirupsen/logrus"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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)
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const (
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msg = "No endpoints could be generated from '%s/%s/%s'"
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)
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// SuitableType returns the DNS record type for the given target:
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// A for IPv4, AAAA for IPv6, CNAME for everything else.
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func SuitableType(target string) string {
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ip, err := netip.ParseAddr(target)
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if err != nil {
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return RecordTypeCNAME
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}
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switch {
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case ip.Is4():
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return RecordTypeA
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case ip.Is6():
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return RecordTypeAAAA
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default:
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return RecordTypeCNAME
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}
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}
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// HasNoEmptyEndpoints checks if the endpoint list is empty and logs
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// a debug message if so. Returns true if empty, false otherwise.
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func HasNoEmptyEndpoints(
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endpoints []*Endpoint,
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rType string, entity metav1.ObjectMetaAccessor,
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) bool {
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if len(endpoints) == 0 {
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log.Debugf(msg, rType, entity.GetObjectMeta().GetNamespace(), entity.GetObjectMeta().GetName())
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return true
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}
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return false
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}
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// EndpointsForHostname returns endpoint objects for each host-target combination,
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// grouping targets by their suitable DNS record type (A, AAAA, or CNAME).
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func EndpointsForHostname(hostname string, targets Targets, ttl TTL, providerSpecific ProviderSpecific, setIdentifier string, resource string) []*Endpoint {
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byType := map[string]Targets{}
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for _, t := range targets {
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rt := SuitableType(t)
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byType[rt] = append(byType[rt], t)
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}
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var endpoints []*Endpoint
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for _, rt := range []string{RecordTypeA, RecordTypeAAAA, RecordTypeCNAME} {
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if len(byType[rt]) == 0 {
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continue
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}
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ep := NewEndpointWithTTL(hostname, rt, ttl, byType[rt]...)
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if ep == nil {
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continue
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}
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ep.ProviderSpecific = providerSpecific
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ep.SetIdentifier = setIdentifier
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if resource != "" {
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ep.Labels[ResourceLabelKey] = resource
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}
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endpoints = append(endpoints, ep)
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}
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return endpoints
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}
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