mirror of
https://github.com/coredns/coredns.git
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5c71bd0b87
* kubernetes: add multicluster support Add multicluster support via Multi-Cluster Services API (MCS-API) via a new option `multiclusterZones` in the kubernetes plugin. When some multicluster zones are passed to the kubernetes plugin, it will start watching the ServiceImport objects and its associated EndpointSlices. Signed-off-by: Arthur Outhenin-Chalandre <arthur@cri.epita.fr> * kubernetes: implement xfr support for multicluster zones Signed-off-by: Arthur Outhenin-Chalandre <arthur@cri.epita.fr> --------- Signed-off-by: Arthur Outhenin-Chalandre <arthur@cri.epita.fr>
434 lines
13 KiB
Go
434 lines
13 KiB
Go
package external
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import (
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"context"
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"testing"
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"github.com/coredns/coredns/plugin/kubernetes"
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"github.com/coredns/coredns/plugin/kubernetes/object"
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"github.com/coredns/coredns/plugin/pkg/dnstest"
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"github.com/coredns/coredns/plugin/test"
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"github.com/coredns/coredns/request"
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"github.com/miekg/dns"
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api "k8s.io/api/core/v1"
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)
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func TestExternal(t *testing.T) {
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k := kubernetes.New([]string{"cluster.local."})
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k.Namespaces = map[string]struct{}{"testns": {}}
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k.APIConn = &external{}
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e := New()
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e.Zones = []string{"example.com.", "in-addr.arpa."}
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e.headless = true
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e.Next = test.NextHandler(dns.RcodeSuccess, nil)
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e.externalFunc = k.External
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e.externalAddrFunc = externalAddress // internal test function
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e.externalSerialFunc = externalSerial // internal test function
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ctx := context.TODO()
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for i, tc := range tests {
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r := tc.Msg()
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w := dnstest.NewRecorder(&test.ResponseWriter{})
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_, err := e.ServeDNS(ctx, w, r)
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if err != tc.Error {
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t.Errorf("Test %d expected no error, got %v", i, err)
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return
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}
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if tc.Error != nil {
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continue
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}
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resp := w.Msg
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if resp == nil {
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t.Fatalf("Test %d, got nil message and no error for %q", i, r.Question[0].Name)
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}
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if !resp.Authoritative {
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t.Error("Expected authoritative answer")
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}
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if err = test.SortAndCheck(resp, tc); err != nil {
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t.Errorf("Test %d: %v", i, err)
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}
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}
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}
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var tests = []test.Case{
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// PTR reverse lookup
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{
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Qname: "4.3.2.1.in-addr.arpa.", Qtype: dns.TypePTR, Rcode: dns.RcodeSuccess,
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Answer: []dns.RR{
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test.PTR("4.3.2.1.in-addr.arpa. 5 IN PTR svc1.testns.example.com."),
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},
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},
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// Bad PTR reverse lookup using existing service name
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{
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Qname: "svc1.testns.example.com.", Qtype: dns.TypePTR, Rcode: dns.RcodeSuccess,
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Ns: []dns.RR{
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test.SOA("example.com. 5 IN SOA ns1.dns.example.com. hostmaster.example.com. 1499347823 7200 1800 86400 5"),
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},
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},
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// Bad PTR reverse lookup using non-existing service name
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{
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Qname: "not-existing.testns.example.com.", Qtype: dns.TypePTR, Rcode: dns.RcodeNameError,
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Ns: []dns.RR{
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test.SOA("example.com. 5 IN SOA ns1.dns.example.com. hostmaster.example.com. 1499347823 7200 1800 86400 5"),
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},
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},
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// A Service
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{
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Qname: "svc1.testns.example.com.", Qtype: dns.TypeA, Rcode: dns.RcodeSuccess,
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Answer: []dns.RR{
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test.A("svc1.testns.example.com. 5 IN A 1.2.3.4"),
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},
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},
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{
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Qname: "svc1.testns.example.com.", Qtype: dns.TypeSRV, Rcode: dns.RcodeSuccess,
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Answer: []dns.RR{test.SRV("svc1.testns.example.com. 5 IN SRV 0 100 80 svc1.testns.example.com.")},
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Extra: []dns.RR{test.A("svc1.testns.example.com. 5 IN A 1.2.3.4")},
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},
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// SRV Service Not udp/tcp
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{
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Qname: "*._not-udp-or-tcp.svc1.testns.example.com.", Qtype: dns.TypeSRV, Rcode: dns.RcodeNameError,
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Ns: []dns.RR{
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test.SOA("example.com. 5 IN SOA ns1.dns.example.com. hostmaster.example.com. 1499347823 7200 1800 86400 5"),
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},
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},
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// SRV Service
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{
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Qname: "_http._tcp.svc1.testns.example.com.", Qtype: dns.TypeSRV, Rcode: dns.RcodeSuccess,
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Answer: []dns.RR{
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test.SRV("_http._tcp.svc1.testns.example.com. 5 IN SRV 0 100 80 svc1.testns.example.com."),
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},
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Extra: []dns.RR{
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test.A("svc1.testns.example.com. 5 IN A 1.2.3.4"),
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},
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},
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// AAAA Service (with an existing A record, but no AAAA record)
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{
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Qname: "svc1.testns.example.com.", Qtype: dns.TypeAAAA, Rcode: dns.RcodeSuccess,
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Ns: []dns.RR{
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test.SOA("example.com. 5 IN SOA ns1.dns.example.com. hostmaster.example.com. 1499347823 7200 1800 86400 5"),
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},
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},
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// AAAA Service (non-existing service)
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{
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Qname: "svc0.testns.example.com.", Qtype: dns.TypeAAAA, Rcode: dns.RcodeNameError,
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Ns: []dns.RR{
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test.SOA("example.com. 5 IN SOA ns1.dns.example.com. hostmaster.example.com. 1499347823 7200 1800 86400 5"),
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},
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},
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// A Service (non-existing service)
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{
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Qname: "svc0.testns.example.com.", Qtype: dns.TypeA, Rcode: dns.RcodeNameError,
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Ns: []dns.RR{
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test.SOA("example.com. 5 IN SOA ns1.dns.example.com. hostmaster.example.com. 1499347823 7200 1800 86400 5"),
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},
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},
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// A Service (non-existing namespace)
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{
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Qname: "svc0.svc-nons.example.com.", Qtype: dns.TypeA, Rcode: dns.RcodeNameError,
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Ns: []dns.RR{
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test.SOA("example.com. 5 IN SOA ns1.dns.example.com. hostmaster.example.com. 1499347823 7200 1800 86400 5"),
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},
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},
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// AAAA Service
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{
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Qname: "svc6.testns.example.com.", Qtype: dns.TypeAAAA, Rcode: dns.RcodeSuccess,
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Answer: []dns.RR{
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test.AAAA("svc6.testns.example.com. 5 IN AAAA 1:2::5"),
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},
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},
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// SRV
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{
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Qname: "_http._tcp.svc6.testns.example.com.", Qtype: dns.TypeSRV, Rcode: dns.RcodeSuccess,
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Answer: []dns.RR{
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test.SRV("_http._tcp.svc6.testns.example.com. 5 IN SRV 0 100 80 svc6.testns.example.com."),
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},
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Extra: []dns.RR{
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test.AAAA("svc6.testns.example.com. 5 IN AAAA 1:2::5"),
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},
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},
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// SRV
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{
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Qname: "svc6.testns.example.com.", Qtype: dns.TypeSRV, Rcode: dns.RcodeSuccess,
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Answer: []dns.RR{
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test.SRV("svc6.testns.example.com. 5 IN SRV 0 100 80 svc6.testns.example.com."),
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},
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Extra: []dns.RR{
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test.AAAA("svc6.testns.example.com. 5 IN AAAA 1:2::5"),
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},
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},
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{
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Qname: "testns.example.com.", Qtype: dns.TypeA, Rcode: dns.RcodeSuccess,
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Ns: []dns.RR{
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test.SOA("example.com. 5 IN SOA ns1.dns.example.com. hostmaster.example.com. 1499347823 7200 1800 86400 5"),
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},
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},
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{
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Qname: "testns.example.com.", Qtype: dns.TypeSOA, Rcode: dns.RcodeSuccess,
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Ns: []dns.RR{
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test.SOA("example.com. 5 IN SOA ns1.dns.example.com. hostmaster.example.com. 1499347823 7200 1800 86400 5"),
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},
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},
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// svc11
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{
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Qname: "svc11.testns.example.com.", Qtype: dns.TypeA, Rcode: dns.RcodeSuccess,
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Answer: []dns.RR{
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test.A("svc11.testns.example.com. 5 IN A 2.3.4.5"),
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},
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},
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{
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Qname: "_http._tcp.svc11.testns.example.com.", Qtype: dns.TypeSRV, Rcode: dns.RcodeSuccess,
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Answer: []dns.RR{
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test.SRV("_http._tcp.svc11.testns.example.com. 5 IN SRV 0 100 80 svc11.testns.example.com."),
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},
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Extra: []dns.RR{
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test.A("svc11.testns.example.com. 5 IN A 2.3.4.5"),
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},
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},
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{
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Qname: "svc11.testns.example.com.", Qtype: dns.TypeSRV, Rcode: dns.RcodeSuccess,
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Answer: []dns.RR{
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test.SRV("svc11.testns.example.com. 5 IN SRV 0 100 80 svc11.testns.example.com."),
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},
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Extra: []dns.RR{
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test.A("svc11.testns.example.com. 5 IN A 2.3.4.5"),
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},
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},
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// svc12
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{
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Qname: "svc12.testns.example.com.", Qtype: dns.TypeA, Rcode: dns.RcodeSuccess,
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Answer: []dns.RR{
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test.CNAME("svc12.testns.example.com. 5 IN CNAME dummy.hostname"),
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},
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},
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{
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Qname: "_http._tcp.svc12.testns.example.com.", Qtype: dns.TypeSRV, Rcode: dns.RcodeSuccess,
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Answer: []dns.RR{
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test.SRV("_http._tcp.svc12.testns.example.com. 5 IN SRV 0 100 80 dummy.hostname."),
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},
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},
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{
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Qname: "svc12.testns.example.com.", Qtype: dns.TypeSRV, Rcode: dns.RcodeSuccess,
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Answer: []dns.RR{
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test.SRV("svc12.testns.example.com. 5 IN SRV 0 100 80 dummy.hostname."),
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},
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},
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// headless service
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{
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Qname: "svc-headless.testns.example.com.", Qtype: dns.TypeA, Rcode: dns.RcodeSuccess,
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Answer: []dns.RR{
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test.A("svc-headless.testns.example.com. 5 IN A 1.2.3.4"),
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test.A("svc-headless.testns.example.com. 5 IN A 1.2.3.5"),
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},
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},
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{
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Qname: "svc-headless.testns.example.com.", Qtype: dns.TypeSRV, Rcode: dns.RcodeSuccess,
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Answer: []dns.RR{
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test.SRV("svc-headless.testns.example.com. 5 IN SRV 0 50 80 endpoint-svc-0.svc-headless.testns.example.com."),
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test.SRV("svc-headless.testns.example.com. 5 IN SRV 0 50 80 endpoint-svc-1.svc-headless.testns.example.com."),
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},
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Extra: []dns.RR{
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test.A("endpoint-svc-0.svc-headless.testns.example.com. 5 IN A 1.2.3.4"),
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test.A("endpoint-svc-1.svc-headless.testns.example.com. 5 IN A 1.2.3.5"),
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},
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},
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{
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Qname: "_http._tcp.svc-headless.testns.example.com.", Qtype: dns.TypeSRV, Rcode: dns.RcodeSuccess,
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Answer: []dns.RR{
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test.SRV("_http._tcp.svc-headless.testns.example.com. 5 IN SRV 0 50 80 endpoint-svc-0.svc-headless.testns.example.com."),
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test.SRV("_http._tcp.svc-headless.testns.example.com. 5 IN SRV 0 50 80 endpoint-svc-1.svc-headless.testns.example.com."),
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},
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Extra: []dns.RR{
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test.A("endpoint-svc-0.svc-headless.testns.example.com. 5 IN A 1.2.3.4"),
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test.A("endpoint-svc-1.svc-headless.testns.example.com. 5 IN A 1.2.3.5"),
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},
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},
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{
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Qname: "endpoint-svc-0.svc-headless.testns.example.com.", Qtype: dns.TypeSRV, Rcode: dns.RcodeSuccess,
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Answer: []dns.RR{
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test.SRV("endpoint-svc-0.svc-headless.testns.example.com. 5 IN SRV 0 100 80 endpoint-svc-0.svc-headless.testns.example.com."),
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},
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Extra: []dns.RR{
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test.A("endpoint-svc-0.svc-headless.testns.example.com. 5 IN A 1.2.3.4"),
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},
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},
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{
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Qname: "endpoint-svc-1.svc-headless.testns.example.com.", Qtype: dns.TypeSRV, Rcode: dns.RcodeSuccess,
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Answer: []dns.RR{
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test.SRV("endpoint-svc-1.svc-headless.testns.example.com. 5 IN SRV 0 100 80 endpoint-svc-1.svc-headless.testns.example.com."),
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},
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Extra: []dns.RR{
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test.A("endpoint-svc-1.svc-headless.testns.example.com. 5 IN A 1.2.3.5"),
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},
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},
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{
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Qname: "endpoint-svc-0.svc-headless.testns.example.com.", Qtype: dns.TypeA, Rcode: dns.RcodeSuccess,
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Answer: []dns.RR{
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test.A("endpoint-svc-0.svc-headless.testns.example.com. 5 IN A 1.2.3.4"),
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},
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},
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{
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Qname: "endpoint-svc-1.svc-headless.testns.example.com.", Qtype: dns.TypeA, Rcode: dns.RcodeSuccess,
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Answer: []dns.RR{
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test.A("endpoint-svc-1.svc-headless.testns.example.com. 5 IN A 1.2.3.5"),
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},
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},
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}
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type external struct{}
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func (external) HasSynced() bool { return true }
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func (external) Run() {}
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func (external) Stop() error { return nil }
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func (external) EpIndexReverse(string) []*object.Endpoints { return nil }
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func (external) SvcIndexReverse(string) []*object.Service { return nil }
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func (external) Modified(kubernetes.ModifiedMode) int64 { return 0 }
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func (external) SvcImportIndex(s string) []*object.ServiceImport { return nil }
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func (external) ServiceImportList() []*object.ServiceImport { return nil }
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func (external) McEpIndex(s string) []*object.MultiClusterEndpoints { return nil }
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func (external) MultiClusterEndpointsList(s string) []*object.MultiClusterEndpoints { return nil }
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func (external) EpIndex(s string) []*object.Endpoints {
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return epIndexExternal[s]
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}
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func (external) EndpointsList() []*object.Endpoints {
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var eps []*object.Endpoints
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for _, ep := range epIndexExternal {
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eps = append(eps, ep...)
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}
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return eps
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}
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func (external) GetNodeByName(ctx context.Context, name string) (*api.Node, error) { return nil, nil }
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func (external) SvcIndex(s string) []*object.Service { return svcIndexExternal[s] }
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func (external) PodIndex(string) []*object.Pod { return nil }
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func (external) SvcExtIndexReverse(ip string) (result []*object.Service) {
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for _, svcs := range svcIndexExternal {
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for _, svc := range svcs {
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for _, exIp := range svc.ExternalIPs {
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if exIp != ip {
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continue
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}
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result = append(result, svc)
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}
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}
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}
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return result
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}
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func (external) GetNamespaceByName(name string) (*object.Namespace, error) {
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return &object.Namespace{
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Name: name,
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}, nil
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}
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var epIndexExternal = map[string][]*object.Endpoints{
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"svc-headless.testns": {
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{
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Name: "svc-headless",
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Namespace: "testns",
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Index: "svc-headless.testns",
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Subsets: []object.EndpointSubset{
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{
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Ports: []object.EndpointPort{
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{
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Port: 80,
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Name: "http",
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Protocol: "TCP",
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},
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},
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Addresses: []object.EndpointAddress{
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{
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IP: "1.2.3.4",
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Hostname: "endpoint-svc-0",
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NodeName: "test-node",
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TargetRefName: "endpoint-svc-0",
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},
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{
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IP: "1.2.3.5",
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Hostname: "endpoint-svc-1",
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NodeName: "test-node",
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TargetRefName: "endpoint-svc-1",
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},
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},
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},
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},
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},
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},
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}
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var svcIndexExternal = map[string][]*object.Service{
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"svc1.testns": {
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{
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Name: "svc1",
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Namespace: "testns",
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Type: api.ServiceTypeClusterIP,
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ClusterIPs: []string{"10.0.0.1"},
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ExternalIPs: []string{"1.2.3.4"},
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Ports: []api.ServicePort{{Name: "http", Protocol: "tcp", Port: 80}},
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},
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},
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"svc6.testns": {
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{
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Name: "svc6",
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Namespace: "testns",
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Type: api.ServiceTypeClusterIP,
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ClusterIPs: []string{"10.0.0.3"},
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ExternalIPs: []string{"1:2::5"},
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Ports: []api.ServicePort{{Name: "http", Protocol: "tcp", Port: 80}},
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},
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},
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"svc11.testns": {
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{
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Name: "svc11",
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Namespace: "testns",
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Type: api.ServiceTypeLoadBalancer,
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ExternalIPs: []string{"2.3.4.5"},
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ClusterIPs: []string{"10.0.0.3"},
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Ports: []api.ServicePort{{Name: "http", Protocol: "tcp", Port: 80}},
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},
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},
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"svc12.testns": {
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{
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Name: "svc12",
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Namespace: "testns",
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Type: api.ServiceTypeLoadBalancer,
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ClusterIPs: []string{"10.0.0.3"},
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ExternalIPs: []string{"dummy.hostname"},
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Ports: []api.ServicePort{{Name: "http", Protocol: "tcp", Port: 80}},
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},
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},
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"svc-headless.testns": {
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{
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Name: "svc-headless",
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Namespace: "testns",
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Type: api.ServiceTypeClusterIP,
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ClusterIPs: []string{"None"},
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|
Ports: []api.ServicePort{{Name: "http", Protocol: "tcp", Port: 80}},
|
|
},
|
|
},
|
|
}
|
|
|
|
func (external) ServiceList() []*object.Service {
|
|
var svcs []*object.Service
|
|
for _, svc := range svcIndexExternal {
|
|
svcs = append(svcs, svc...)
|
|
}
|
|
return svcs
|
|
}
|
|
|
|
func externalAddress(state request.Request, headless bool) []dns.RR {
|
|
a := test.A("example.org. IN A 127.0.0.1")
|
|
return []dns.RR{a}
|
|
}
|
|
|
|
func externalSerial(string) uint32 {
|
|
return 1499347823
|
|
}
|