package external
import (
"context"
"testing"
"github.com/coredns/coredns/plugin/kubernetes"
"github.com/coredns/coredns/plugin/kubernetes/object"
"github.com/coredns/coredns/plugin/pkg/dnstest"
"github.com/coredns/coredns/plugin/test"
"github.com/coredns/coredns/request"
"github.com/miekg/dns"
api "k8s.io/api/core/v1"
)
func TestExternal(t *testing.T) {
k := kubernetes.New([]string{"cluster.local."})
k.Namespaces = map[string]struct{}{"testns": {}}
k.APIConn = &external{}
e := New()
e.Zones = []string{"example.com.", "in-addr.arpa."}
e.headless = true
e.Next = test.NextHandler(dns.RcodeSuccess, nil)
e.externalFunc = k.External
e.externalAddrFunc = externalAddress // internal test function
e.externalSerialFunc = externalSerial // internal test function
ctx := context.TODO()
for i, tc := range tests {
r := tc.Msg()
w := dnstest.NewRecorder(&test.ResponseWriter{})
_, err := e.ServeDNS(ctx, w, r)
if err != tc.Error {
t.Errorf("Test %d expected no error, got %v", i, err)
return
}
if tc.Error != nil {
continue
}
resp := w.Msg
if resp == nil {
t.Fatalf("Test %d, got nil message and no error for %q", i, r.Question[0].Name)
}
if !resp.Authoritative {
t.Error("Expected authoritative answer")
}
if err = test.SortAndCheck(resp, tc); err != nil {
t.Errorf("Test %d: %v", i, err)
}
}
}
var tests = []test.Case{
// PTR reverse lookup
{
Qname: "4.3.2.1.in-addr.arpa.", Qtype: dns.TypePTR, Rcode: dns.RcodeSuccess,
Answer: []dns.RR{
test.PTR("4.3.2.1.in-addr.arpa. 5 IN PTR svc1.testns.example.com."),
},
},
// Bad PTR reverse lookup using existing service name
{
Qname: "svc1.testns.example.com.", Qtype: dns.TypePTR, Rcode: dns.RcodeSuccess,
Ns: []dns.RR{
test.SOA("example.com. 5 IN SOA ns1.dns.example.com. hostmaster.example.com. 1499347823 7200 1800 86400 5"),
},
},
// Bad PTR reverse lookup using non-existing service name
{
Qname: "not-existing.testns.example.com.", Qtype: dns.TypePTR, Rcode: dns.RcodeNameError,
Ns: []dns.RR{
test.SOA("example.com. 5 IN SOA ns1.dns.example.com. hostmaster.example.com. 1499347823 7200 1800 86400 5"),
},
},
// A Service
{
Qname: "svc1.testns.example.com.", Qtype: dns.TypeA, Rcode: dns.RcodeSuccess,
Answer: []dns.RR{
test.A("svc1.testns.example.com. 5 IN A 1.2.3.4"),
},
},
{
Qname: "svc1.testns.example.com.", Qtype: dns.TypeSRV, Rcode: dns.RcodeSuccess,
Answer: []dns.RR{test.SRV("svc1.testns.example.com. 5 IN SRV 0 100 80 svc1.testns.example.com.")},
Extra: []dns.RR{test.A("svc1.testns.example.com. 5 IN A 1.2.3.4")},
},
// SRV Service Not udp/tcp
{
Qname: "*._not-udp-or-tcp.svc1.testns.example.com.", Qtype: dns.TypeSRV, Rcode: dns.RcodeNameError,
Ns: []dns.RR{
test.SOA("example.com. 5 IN SOA ns1.dns.example.com. hostmaster.example.com. 1499347823 7200 1800 86400 5"),
},
},
// SRV Service
{
Qname: "_http._tcp.svc1.testns.example.com.", Qtype: dns.TypeSRV, Rcode: dns.RcodeSuccess,
Answer: []dns.RR{
test.SRV("_http._tcp.svc1.testns.example.com. 5 IN SRV 0 100 80 svc1.testns.example.com."),
},
Extra: []dns.RR{
test.A("svc1.testns.example.com. 5 IN A 1.2.3.4"),
},
},
// AAAA Service (with an existing A record, but no AAAA record)
{
Qname: "svc1.testns.example.com.", Qtype: dns.TypeAAAA, Rcode: dns.RcodeSuccess,
Ns: []dns.RR{
test.SOA("example.com. 5 IN SOA ns1.dns.example.com. hostmaster.example.com. 1499347823 7200 1800 86400 5"),
},
},
// AAAA Service (non-existing service)
{
Qname: "svc0.testns.example.com.", Qtype: dns.TypeAAAA, Rcode: dns.RcodeNameError,
Ns: []dns.RR{
test.SOA("example.com. 5 IN SOA ns1.dns.example.com. hostmaster.example.com. 1499347823 7200 1800 86400 5"),
},
},
// A Service (non-existing service)
{
Qname: "svc0.testns.example.com.", Qtype: dns.TypeA, Rcode: dns.RcodeNameError,
Ns: []dns.RR{
test.SOA("example.com. 5 IN SOA ns1.dns.example.com. hostmaster.example.com. 1499347823 7200 1800 86400 5"),
},
},
// A Service (non-existing namespace)
{
Qname: "svc0.svc-nons.example.com.", Qtype: dns.TypeA, Rcode: dns.RcodeNameError,
Ns: []dns.RR{
test.SOA("example.com. 5 IN SOA ns1.dns.example.com. hostmaster.example.com. 1499347823 7200 1800 86400 5"),
},
},
// AAAA Service
{
Qname: "svc6.testns.example.com.", Qtype: dns.TypeAAAA, Rcode: dns.RcodeSuccess,
Answer: []dns.RR{
test.AAAA("svc6.testns.example.com. 5 IN AAAA 1:2::5"),
},
},
// SRV
{
Qname: "_http._tcp.svc6.testns.example.com.", Qtype: dns.TypeSRV, Rcode: dns.RcodeSuccess,
Answer: []dns.RR{
test.SRV("_http._tcp.svc6.testns.example.com. 5 IN SRV 0 100 80 svc6.testns.example.com."),
},
Extra: []dns.RR{
test.AAAA("svc6.testns.example.com. 5 IN AAAA 1:2::5"),
},
},
// SRV
{
Qname: "svc6.testns.example.com.", Qtype: dns.TypeSRV, Rcode: dns.RcodeSuccess,
Answer: []dns.RR{
test.SRV("svc6.testns.example.com. 5 IN SRV 0 100 80 svc6.testns.example.com."),
},
Extra: []dns.RR{
test.AAAA("svc6.testns.example.com. 5 IN AAAA 1:2::5"),
},
},
{
Qname: "testns.example.com.", Qtype: dns.TypeA, Rcode: dns.RcodeSuccess,
Ns: []dns.RR{
test.SOA("example.com. 5 IN SOA ns1.dns.example.com. hostmaster.example.com. 1499347823 7200 1800 86400 5"),
},
},
{
Qname: "testns.example.com.", Qtype: dns.TypeSOA, Rcode: dns.RcodeSuccess,
Ns: []dns.RR{
test.SOA("example.com. 5 IN SOA ns1.dns.example.com. hostmaster.example.com. 1499347823 7200 1800 86400 5"),
},
},
// svc11
{
Qname: "svc11.testns.example.com.", Qtype: dns.TypeA, Rcode: dns.RcodeSuccess,
Answer: []dns.RR{
test.A("svc11.testns.example.com. 5 IN A 2.3.4.5"),
},
},
{
Qname: "_http._tcp.svc11.testns.example.com.", Qtype: dns.TypeSRV, Rcode: dns.RcodeSuccess,
Answer: []dns.RR{
test.SRV("_http._tcp.svc11.testns.example.com. 5 IN SRV 0 100 80 svc11.testns.example.com."),
},
Extra: []dns.RR{
test.A("svc11.testns.example.com. 5 IN A 2.3.4.5"),
},
},
{
Qname: "svc11.testns.example.com.", Qtype: dns.TypeSRV, Rcode: dns.RcodeSuccess,
Answer: []dns.RR{
test.SRV("svc11.testns.example.com. 5 IN SRV 0 100 80 svc11.testns.example.com."),
},
Extra: []dns.RR{
test.A("svc11.testns.example.com. 5 IN A 2.3.4.5"),
},
},
// svc12
{
Qname: "svc12.testns.example.com.", Qtype: dns.TypeA, Rcode: dns.RcodeSuccess,
Answer: []dns.RR{
test.CNAME("svc12.testns.example.com. 5 IN CNAME dummy.hostname"),
},
},
{
Qname: "_http._tcp.svc12.testns.example.com.", Qtype: dns.TypeSRV, Rcode: dns.RcodeSuccess,
Answer: []dns.RR{
test.SRV("_http._tcp.svc12.testns.example.com. 5 IN SRV 0 100 80 dummy.hostname."),
},
},
{
Qname: "svc12.testns.example.com.", Qtype: dns.TypeSRV, Rcode: dns.RcodeSuccess,
Answer: []dns.RR{
test.SRV("svc12.testns.example.com. 5 IN SRV 0 100 80 dummy.hostname."),
},
},
// headless service
{
Qname: "svc-headless.testns.example.com.", Qtype: dns.TypeA, Rcode: dns.RcodeSuccess,
Answer: []dns.RR{
test.A("svc-headless.testns.example.com. 5 IN A 1.2.3.4"),
test.A("svc-headless.testns.example.com. 5 IN A 1.2.3.5"),
},
},
{
Qname: "svc-headless.testns.example.com.", Qtype: dns.TypeSRV, Rcode: dns.RcodeSuccess,
Answer: []dns.RR{
test.SRV("svc-headless.testns.example.com. 5 IN SRV 0 50 80 endpoint-svc-0.svc-headless.testns.example.com."),
test.SRV("svc-headless.testns.example.com. 5 IN SRV 0 50 80 endpoint-svc-1.svc-headless.testns.example.com."),
},
Extra: []dns.RR{
test.A("endpoint-svc-0.svc-headless.testns.example.com. 5 IN A 1.2.3.4"),
test.A("endpoint-svc-1.svc-headless.testns.example.com. 5 IN A 1.2.3.5"),
},
},
{
Qname: "_http._tcp.svc-headless.testns.example.com.", Qtype: dns.TypeSRV, Rcode: dns.RcodeSuccess,
Answer: []dns.RR{
test.SRV("_http._tcp.svc-headless.testns.example.com. 5 IN SRV 0 50 80 endpoint-svc-0.svc-headless.testns.example.com."),
test.SRV("_http._tcp.svc-headless.testns.example.com. 5 IN SRV 0 50 80 endpoint-svc-1.svc-headless.testns.example.com."),
},
Extra: []dns.RR{
test.A("endpoint-svc-0.svc-headless.testns.example.com. 5 IN A 1.2.3.4"),
test.A("endpoint-svc-1.svc-headless.testns.example.com. 5 IN A 1.2.3.5"),
},
},
{
Qname: "endpoint-svc-0.svc-headless.testns.example.com.", Qtype: dns.TypeSRV, Rcode: dns.RcodeSuccess,
Answer: []dns.RR{
test.SRV("endpoint-svc-0.svc-headless.testns.example.com. 5 IN SRV 0 100 80 endpoint-svc-0.svc-headless.testns.example.com."),
},
Extra: []dns.RR{
test.A("endpoint-svc-0.svc-headless.testns.example.com. 5 IN A 1.2.3.4"),
},
},
{
Qname: "endpoint-svc-1.svc-headless.testns.example.com.", Qtype: dns.TypeSRV, Rcode: dns.RcodeSuccess,
Answer: []dns.RR{
test.SRV("endpoint-svc-1.svc-headless.testns.example.com. 5 IN SRV 0 100 80 endpoint-svc-1.svc-headless.testns.example.com."),
},
Extra: []dns.RR{
test.A("endpoint-svc-1.svc-headless.testns.example.com. 5 IN A 1.2.3.5"),
},
},
{
Qname: "endpoint-svc-0.svc-headless.testns.example.com.", Qtype: dns.TypeA, Rcode: dns.RcodeSuccess,
Answer: []dns.RR{
test.A("endpoint-svc-0.svc-headless.testns.example.com. 5 IN A 1.2.3.4"),
},
},
{
Qname: "endpoint-svc-1.svc-headless.testns.example.com.", Qtype: dns.TypeA, Rcode: dns.RcodeSuccess,
Answer: []dns.RR{
test.A("endpoint-svc-1.svc-headless.testns.example.com. 5 IN A 1.2.3.5"),
},
},
}
type external struct{}
func (external) HasSynced() bool { return true }
func (external) Run() {}
func (external) Stop() error { return nil }
func (external) EpIndexReverse(string) []*object.Endpoints { return nil }
func (external) SvcIndexReverse(string) []*object.Service { return nil }
func (external) Modified(bool) int64 { return 0 }
func (external) EpIndex(s string) []*object.Endpoints {
return epIndexExternal[s]
}
func (external) EndpointsList() []*object.Endpoints {
var eps []*object.Endpoints
for _, ep := range epIndexExternal {
eps = append(eps, ep...)
}
return eps
}
func (external) GetNodeByName(ctx context.Context, name string) (*api.Node, error) { return nil, nil }
func (external) SvcIndex(s string) []*object.Service { return svcIndexExternal[s] }
func (external) PodIndex(string) []*object.Pod { return nil }
func (external) SvcExtIndexReverse(ip string) (result []*object.Service) {
for _, svcs := range svcIndexExternal {
for _, svc := range svcs {
for _, exIp := range svc.ExternalIPs {
if exIp != ip {
continue
}
result = append(result, svc)
}
}
}
return result
}
func (external) GetNamespaceByName(name string) (*object.Namespace, error) {
return &object.Namespace{
Name: name,
}, nil
}
var epIndexExternal = map[string][]*object.Endpoints{
"svc-headless.testns": {
{
Name: "svc-headless",
Namespace: "testns",
Index: "svc-headless.testns",
Subsets: []object.EndpointSubset{
{
Ports: []object.EndpointPort{
{
Port: 80,
Name: "http",
Protocol: "TCP",
},
},
Addresses: []object.EndpointAddress{
{
IP: "1.2.3.4",
Hostname: "endpoint-svc-0",
NodeName: "test-node",
TargetRefName: "endpoint-svc-0",
},
{
IP: "1.2.3.5",
Hostname: "endpoint-svc-1",
NodeName: "test-node",
TargetRefName: "endpoint-svc-1",
},
},
},
},
},
},
}
var svcIndexExternal = map[string][]*object.Service{
"svc1.testns": {
{
Name: "svc1",
Namespace: "testns",
Type: api.ServiceTypeClusterIP,
ClusterIPs: []string{"10.0.0.1"},
ExternalIPs: []string{"1.2.3.4"},
Ports: []api.ServicePort{{Name: "http", Protocol: "tcp", Port: 80}},
},
},
"svc6.testns": {
{
Name: "svc6",
Namespace: "testns",
Type: api.ServiceTypeClusterIP,
ClusterIPs: []string{"10.0.0.3"},
ExternalIPs: []string{"1:2::5"},
Ports: []api.ServicePort{{Name: "http", Protocol: "tcp", Port: 80}},
},
},
"svc11.testns": {
{
Name: "svc11",
Namespace: "testns",
Type: api.ServiceTypeLoadBalancer,
ExternalIPs: []string{"2.3.4.5"},
ClusterIPs: []string{"10.0.0.3"},
Ports: []api.ServicePort{{Name: "http", Protocol: "tcp", Port: 80}},
},
},
"svc12.testns": {
{
Name: "svc12",
Namespace: "testns",
Type: api.ServiceTypeLoadBalancer,
ClusterIPs: []string{"10.0.0.3"},
ExternalIPs: []string{"dummy.hostname"},
Ports: []api.ServicePort{{Name: "http", Protocol: "tcp", Port: 80}},
},
},
"svc-headless.testns": {
{
Name: "svc-headless",
Namespace: "testns",
Type: api.ServiceTypeClusterIP,
ClusterIPs: []string{"None"},
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
}