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fb9af639d3
This will allow us to pass e.g. a ResourceRecordChangeset, rather than a ResourceRecordChangeset, the parent ResourceRecordSets, and the grandparent Zone. Laying the groundwork for simplifying / optimizing the federation logic.
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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rrset := ResourceRecordSet{name: name, rrdatas: []string{}, rrsets: &rrsets}
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found := false
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for _, node := range response.Node.Nodes {
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found = true
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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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// assuming all rrdatas in a rrset will have same type
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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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}
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rrset.rrdatas = append(rrset.rrdatas, service.Host)
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rrset.ttl = int64(service.TTL)
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}
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if !found {
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return nil, nil
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}
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return rrset, 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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