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package kubernetes
import (
"net"
"strings"
"github.com/miekg/dns"
"k8s.io/client-go/1.5/pkg/api"
)
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()
endpointsList := k.APIConn.EndpointsList()
rr.A = localIP
FindEndpoint:
for _, ep := range endpointsList.Items {
for _, eps := range ep.Subsets {
for _, addr := range eps.Addresses {
if localIP.Equal(net.ParseIP(addr.IP)) {
svcNamespace = ep.ObjectMeta.Namespace
svcName = ep.ObjectMeta.Name
break FindEndpoint
}
}
}
}
if len(svcName) == 0 {
rr.Hdr.Name = defaultNSName
rr.A = localIP
return rr
}
// Find service to get ClusterIP
serviceList := k.APIConn.ServiceList()
FindService:
for _, svc := range serviceList {
if svcName == svc.Name && svcNamespace == svc.Namespace {
if svc.Spec.ClusterIP == api.ClusterIPNone {
rr.A = localIP
} else {
rr.A = net.ParseIP(svc.Spec.ClusterIP)
}
break FindService
}
}
rr.Hdr.Name = strings.Join([]string{svcName, svcNamespace, "svc."}, ".")
return rr
}
const defaultNSName = "ns.dns."
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