mirror of
https://github.com/yunionio/cloudpods.git
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71 lines
2.1 KiB
Go
71 lines
2.1 KiB
Go
// Copyright 2019 Yunion
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//
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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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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package dns
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import (
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"context"
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"strings"
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"github.com/coredns/coredns/plugin"
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"github.com/coredns/coredns/plugin/etcd/msg"
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"github.com/coredns/coredns/plugin/pkg/dnsutil"
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"github.com/coredns/coredns/request"
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"yunion.io/x/onecloud/pkg/compute/models"
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)
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// Reverse implements the ServiceBackend interface
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func (r *SRegionDNS) Reverse(ctx context.Context, state request.Request, exact bool, opt plugin.Options) (services []msg.Service, err error) {
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ip := dnsutil.ExtractAddressFromReverse(state.Name())
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if ip == "" {
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_, e := r.Records(ctx, state, exact)
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return nil, e
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}
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records, err := r.getNameForIp(ip, state)
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return records, err
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}
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func (r *SRegionDNS) getNameForIp(ip string, state request.Request) ([]msg.Service, error) {
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req := parseRequest(state)
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// 1. try local dns records table
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recs, _ := models.DnsRecordManager.QueryPtr(req.ProjectId(), ip)
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if len(recs) > 0 {
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services := make([]msg.Service, 0, len(recs))
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for _, rec := range recs {
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services = append(services, msg.Service{Host: rec.DnsName, TTL: uint32(rec.TTL)})
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}
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return services, nil
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}
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// 2. try guests table
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guest := models.GuestnetworkManager.GetGuestByAddress(ip, req.ProjectId())
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if guest != nil {
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return []msg.Service{{Host: r.joinDomain(guest.Hostname), TTL: defaultTTL}}, nil
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}
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// 3. try hosts table
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host := models.HostnetworkManager.GetHostByAddress(ip)
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if host != nil {
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return []msg.Service{{Host: r.joinDomain(host.Name), TTL: defaultTTL}}, nil
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}
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return nil, errNotFound
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}
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func (r *SRegionDNS) joinDomain(name string) string {
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return strings.Join([]string{name, r.PrimaryZone}, ".")
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}
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