mirror of
https://github.com/kubernetes-sigs/external-dns.git
synced 2026-02-28 13:31:00 +01:00
c0d9262ad5
* chore(fqdn): standardize FQDN template Signed-off-by: ivan katliarchuk <ivan.katliarchuk@gmail.com> * refactore(fqdn): standardize FQDN template Signed-off-by: ivan katliarchuk <ivan.katliarchuk@gmail.com> --------- Signed-off-by: ivan katliarchuk <ivan.katliarchuk@gmail.com>
104 lines
3.1 KiB
Go
104 lines
3.1 KiB
Go
/*
|
|
Copyright 2025 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 source
|
|
|
|
import (
|
|
"fmt"
|
|
"net/netip"
|
|
"sort"
|
|
"strings"
|
|
|
|
"sigs.k8s.io/external-dns/endpoint"
|
|
)
|
|
|
|
// suitableType returns the DNS resource record type suitable for the target.
|
|
// In this case type A/AAAA for IPs and type CNAME for everything else.
|
|
// TODO: move this to the endpoint package?
|
|
func suitableType(target string) string {
|
|
netIP, err := netip.ParseAddr(target)
|
|
if err != nil {
|
|
return endpoint.RecordTypeCNAME
|
|
}
|
|
switch {
|
|
case netIP.Is4():
|
|
return endpoint.RecordTypeA
|
|
case netIP.Is6():
|
|
return endpoint.RecordTypeAAAA
|
|
default:
|
|
return endpoint.RecordTypeCNAME
|
|
}
|
|
}
|
|
|
|
// ParseIngress parses an ingress string in the format "namespace/name" or "name".
|
|
// It returns the namespace and name extracted from the string, or an error if the format is invalid.
|
|
// If the namespace is not provided, it defaults to an empty string.
|
|
func ParseIngress(ingress string) (string, string, error) {
|
|
var namespace, name string
|
|
var err error
|
|
parts := strings.Split(ingress, "/")
|
|
switch len(parts) {
|
|
case 2:
|
|
namespace, name = parts[0], parts[1]
|
|
case 1:
|
|
name = parts[0]
|
|
default:
|
|
err = fmt.Errorf("invalid ingress name (name or namespace/name) found %q", ingress)
|
|
}
|
|
|
|
return namespace, name, err
|
|
}
|
|
|
|
// MatchesServiceSelector checks if all key-value pairs in the selector map
|
|
// are present and match the corresponding key-value pairs in the svcSelector map.
|
|
// It returns true if all pairs match, otherwise it returns false.
|
|
func MatchesServiceSelector(selector, svcSelector map[string]string) bool {
|
|
for k, v := range selector {
|
|
if lbl, ok := svcSelector[k]; !ok || lbl != v {
|
|
return false
|
|
}
|
|
}
|
|
return true
|
|
}
|
|
|
|
// MergeEndpoints merges endpoints with the same key (DNSName + RecordType + RecordTTL)
|
|
// by combining their targets. This is useful when multiple resources (e.g., pods, nodes)
|
|
// contribute targets to the same DNS record.
|
|
//
|
|
// TODO: move this to endpoint/utils.go
|
|
// TODO: apply to all sources that generate endpoints (e.g., service, ingress, etc.)
|
|
func MergeEndpoints(endpoints []*endpoint.Endpoint) []*endpoint.Endpoint {
|
|
endpointMap := make(map[endpoint.EndpointKey]*endpoint.Endpoint)
|
|
|
|
for _, ep := range endpoints {
|
|
key := endpoint.EndpointKey{
|
|
DNSName: ep.DNSName,
|
|
RecordType: ep.RecordType,
|
|
RecordTTL: ep.RecordTTL,
|
|
}
|
|
if existing, ok := endpointMap[key]; ok {
|
|
existing.Targets = append(existing.Targets, ep.Targets...)
|
|
} else {
|
|
endpointMap[key] = ep
|
|
}
|
|
}
|
|
|
|
result := make([]*endpoint.Endpoint, 0, len(endpointMap))
|
|
for _, ep := range endpointMap {
|
|
sort.Sort(ep.Targets)
|
|
result = append(result, ep)
|
|
}
|
|
|
|
return result
|
|
}
|