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package kubernetes
import (
"net"
"strings"
"github.com/coredns/coredns/plugin/kubernetes/object"
"github.com/miekg/dns"
api "k8s.io/api/core/v1"
)
func isDefaultNS(name, zone string) bool {
return strings.Index(name, defaultNSName) == 0 && strings.Index(name, zone) == len(defaultNSName)
}
func (k *Kubernetes) nsAddr() *dns.A {
var (
svcName string
svcNamespace string
)
rr := new(dns.A)
localIP := k.interfaceAddrsFunc()
rr.A = localIP
ep := k.APIConn.EpIndexReverse(localIP.String())
if ep != nil {
FindEndpoint:
for _, eps := range ep.Subsets {
for _, addr := range eps.Addresses {
if localIP.Equal(net.ParseIP(addr.IP)) {
svcNamespace = ep.Namespace
svcName = ep.Name
break FindEndpoint
}
}
}
}
if len(svcName) == 0 {
rr.Hdr.Name = defaultNSName
rr.A = localIP
return rr
}
svc := k.APIConn.SvcIndex(object.ServiceKey(svcNamespace, svcName))
if svc != nil {
if svc.ClusterIP == api.ClusterIPNone {
rr.A = localIP
} else {
rr.A = net.ParseIP(svc.ClusterIP)
}
}
rr.Hdr.Name = strings.Join([]string{svcName, svcNamespace, "svc."}, ".")
return rr
}
const defaultNSName = "ns.dns."
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