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27d893cf33
* Add ServiceBackend interface This adds a ServiceBackend interface that is shared between etcd/etcd3 (later) and kubernetes, leading to a massive reduction in code. When returning the specific records from their backend. Fixes #273
51 lines
1.1 KiB
Go
51 lines
1.1 KiB
Go
package kubernetes
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import (
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"fmt"
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"net"
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"github.com/miekg/coredns/middleware/etcd/msg"
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"github.com/miekg/coredns/middleware/pkg/dnsutil"
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"github.com/miekg/coredns/request"
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"github.com/miekg/dns"
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)
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func (k Kubernetes) records(state request.Request, exact bool) ([]msg.Service, error) {
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services, err := k.Records(state.Name(), exact)
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if err != nil {
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return nil, err
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}
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services = msg.Group(services)
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return services, nil
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}
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// PTR Record returns PTR records from kubernetes.
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func (k Kubernetes) PTR(zone string, state request.Request) ([]dns.RR, error) {
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reverseIP := dnsutil.ExtractAddressFromReverse(state.Name())
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if reverseIP == "" {
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return nil, fmt.Errorf("does not support reverse lookup for %s", state.QName())
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}
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records := make([]dns.RR, 1)
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services, err := k.records(state, false)
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if err != nil {
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return nil, err
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}
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for _, serv := range services {
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ip := net.ParseIP(serv.Host)
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if reverseIP != serv.Host {
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continue
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}
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switch {
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case ip.To4() != nil:
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records = append(records, serv.NewPTR(state.QName(), ip.To4().String()))
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break
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case ip.To4() == nil:
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// nodata?
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}
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}
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return records, nil
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}
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