8d9e90cccf
Added support for AAAA record for coredns and included unit test. Fixed function names in comments for Google and AWS tests to match actual test name in this area.
115 lines
3.2 KiB
Go
115 lines
3.2 KiB
Go
/*
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Copyright 2016 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 coredns
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import (
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"encoding/json"
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"fmt"
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etcdc "github.com/coreos/etcd/client"
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"github.com/golang/glog"
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dnsmsg "github.com/miekg/coredns/middleware/etcd/msg"
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"golang.org/x/net/context"
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"k8s.io/kubernetes/federation/pkg/dnsprovider"
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"k8s.io/kubernetes/federation/pkg/dnsprovider/rrstype"
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"net"
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)
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// Compile time check for interface adherence
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var _ dnsprovider.ResourceRecordSets = ResourceRecordSets{}
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type ResourceRecordSets struct {
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zone *Zone
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}
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func (rrsets ResourceRecordSets) List() ([]dnsprovider.ResourceRecordSet, error) {
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var list []dnsprovider.ResourceRecordSet
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return list, fmt.Errorf("OperationNotSupported")
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}
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func (rrsets ResourceRecordSets) Get(name string) ([]dnsprovider.ResourceRecordSet, error) {
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getOpts := &etcdc.GetOptions{
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Recursive: true,
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}
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etcdPathPrefix := rrsets.zone.zones.intf.etcdPathPrefix
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response, err := rrsets.zone.zones.intf.etcdKeysAPI.Get(context.Background(), dnsmsg.Path(name, etcdPathPrefix), getOpts)
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if err != nil {
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if etcdc.IsKeyNotFound(err) {
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glog.V(2).Infof("Subdomain %q does not exist", name)
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return nil, nil
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}
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return nil, fmt.Errorf("Failed to get service from etcd, err: %v", err)
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}
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if emptyResponse(response) {
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glog.V(2).Infof("Subdomain %q does not exist in etcd", name)
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return nil, nil
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}
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var list []dnsprovider.ResourceRecordSet
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for _, node := range response.Node.Nodes {
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service := dnsmsg.Service{}
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err = json.Unmarshal([]byte(node.Value), &service)
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if err != nil {
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return nil, fmt.Errorf("Failed to unmarshall json data, err: %v", err)
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}
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rrset := ResourceRecordSet{name: name, rrdatas: []string{}, rrsets: &rrsets}
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ip := net.ParseIP(service.Host)
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switch {
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case ip == nil:
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rrset.rrsType = rrstype.CNAME
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case ip.To4() != nil:
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rrset.rrsType = rrstype.A
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case ip.To16() != nil:
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rrset.rrsType = rrstype.AAAA
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default:
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// Cannot occur
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}
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rrset.rrdatas = append(rrset.rrdatas, service.Host)
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rrset.ttl = int64(service.TTL)
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list = append(list, rrset)
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}
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return list, nil
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}
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func (rrsets ResourceRecordSets) StartChangeset() dnsprovider.ResourceRecordChangeset {
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return &ResourceRecordChangeset{
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zone: rrsets.zone,
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rrsets: &rrsets,
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}
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}
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func (rrsets ResourceRecordSets) New(name string, rrdatas []string, ttl int64, rrsType rrstype.RrsType) dnsprovider.ResourceRecordSet {
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return ResourceRecordSet{
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name: name,
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rrdatas: rrdatas,
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ttl: ttl,
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rrsType: rrsType,
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rrsets: &rrsets,
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}
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}
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// Zone returns the parent zone
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func (rrset ResourceRecordSets) Zone() dnsprovider.Zone {
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return rrset.zone
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}
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func emptyResponse(resp *etcdc.Response) bool {
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return resp == nil || resp.Node == nil || (len(resp.Node.Value) == 0 && len(resp.Node.Nodes) == 0)
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}
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