acfa6501e0
* mw/k8s: remove dependence on global var Remove the global coreDNSRecord that was used. Remove tests the referenced that var. Cleanup the rest. * Rename function as well * fixes
80 lines
1.8 KiB
Go
80 lines
1.8 KiB
Go
package kubernetes
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import (
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"net"
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"strings"
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"github.com/coredns/coredns/middleware/etcd/msg"
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"github.com/miekg/dns"
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"k8s.io/client-go/1.5/pkg/api"
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)
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// DefaultNSMsg returns an msg.Service representing an A record for
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// ns.dns.[zone] -> dns service ip. This A record is needed to legitimize
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// the SOA response in middleware.NS(), which is hardcoded at ns.dns.[zone].
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func (k *Kubernetes) defaultNSMsg(r recordRequest) msg.Service {
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ns := k.nsAddr()
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s := msg.Service{
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Key: msg.Path(strings.Join([]string{defaultNSName, r.zone}, "."), "coredns"),
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Host: ns.A.String(),
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}
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return s
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}
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func isDefaultNS(name string, r recordRequest) bool {
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return strings.Index(name, defaultNSName) == 0 && strings.Index(name, r.zone) == len(defaultNSName)
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}
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func (k *Kubernetes) nsAddr() *dns.A {
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var (
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svcName string
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svcNamespace string
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)
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rr := new(dns.A)
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localIP := k.interfaceAddrsFunc()
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endpointsList := k.APIConn.EndpointsList()
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rr.A = localIP
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FindEndpoint:
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for _, ep := range endpointsList.Items {
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for _, eps := range ep.Subsets {
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for _, addr := range eps.Addresses {
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if localIP.Equal(net.ParseIP(addr.IP)) {
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svcNamespace = ep.ObjectMeta.Namespace
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svcName = ep.ObjectMeta.Name
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break FindEndpoint
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}
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}
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}
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}
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if len(svcName) == 0 {
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rr.Hdr.Name = defaultNSName
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rr.A = localIP
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return rr
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}
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// Find service to get ClusterIP
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serviceList := k.APIConn.ServiceList()
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FindService:
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for _, svc := range serviceList {
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if svcName == svc.Name && svcNamespace == svc.Namespace {
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if svc.Spec.ClusterIP == api.ClusterIPNone {
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rr.A = localIP
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} else {
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rr.A = net.ParseIP(svc.Spec.ClusterIP)
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}
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break FindService
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}
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}
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rr.Hdr.Name = strings.Join([]string{svcName, svcNamespace, "svc."}, ".")
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return rr
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}
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const defaultNSName = "ns.dns."
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