256 lines
8.2 KiB
Go
256 lines
8.2 KiB
Go
package kubernetes
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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/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/miekg/dns"
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api "k8s.io/api/core/v1"
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meta "k8s.io/apimachinery/pkg/apis/meta/v1"
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)
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type APIConnReverseTest struct{}
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func (APIConnReverseTest) HasSynced() bool { return true }
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func (APIConnReverseTest) Run() {}
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func (APIConnReverseTest) Stop() error { return nil }
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func (APIConnReverseTest) PodIndex(string) []*object.Pod { return nil }
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func (APIConnReverseTest) EpIndex(string) []*object.Endpoints { return nil }
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func (APIConnReverseTest) EndpointsList() []*object.Endpoints { return nil }
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func (APIConnReverseTest) ServiceList() []*object.Service { return nil }
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func (APIConnReverseTest) SvcExtIndexReverse(string) []*object.Service { return nil }
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func (APIConnReverseTest) Modified(bool) int64 { return 0 }
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func (APIConnReverseTest) SvcIndex(svc string) []*object.Service {
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if svc != "svc1.testns" {
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return nil
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}
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svcs := []*object.Service{
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{
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Name: "svc1",
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Namespace: "testns",
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ClusterIPs: []string{"192.168.1.100"},
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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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return svcs
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}
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func (APIConnReverseTest) SvcIndexReverse(ip string) []*object.Service {
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if ip != "192.168.1.100" {
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return nil
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}
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svcs := []*object.Service{
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{
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Name: "svc1",
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Namespace: "testns",
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ClusterIPs: []string{"192.168.1.100"},
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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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return svcs
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}
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func (APIConnReverseTest) EpIndexReverse(ip string) []*object.Endpoints {
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ep1s1 := object.Endpoints{
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Subsets: []object.EndpointSubset{
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{
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Addresses: []object.EndpointAddress{
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{IP: "10.0.0.100", Hostname: "ep1a"},
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{IP: "10.0.0.99", Hostname: "double-ep"}, // this endpoint is used by two services
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},
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Ports: []object.EndpointPort{
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{Port: 80, Protocol: "tcp", Name: "http"},
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},
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},
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},
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Name: "svc1-slice1",
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Namespace: "testns",
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Index: object.EndpointsKey("svc1", "testns"),
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}
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ep1s2 := object.Endpoints{
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Subsets: []object.EndpointSubset{
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{
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Addresses: []object.EndpointAddress{
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{IP: "1234:abcd::1", Hostname: "ep1b"},
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{IP: "fd00:77:30::a", Hostname: "ip6svc1ex"},
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{IP: "fd00:77:30::2:9ba6", Hostname: "ip6svc1in"},
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},
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Ports: []object.EndpointPort{
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{Port: 80, Protocol: "tcp", Name: "http"},
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},
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},
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},
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Name: "svc1-slice2",
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Namespace: "testns",
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Index: object.EndpointsKey("svc1", "testns"),
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}
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ep1s3 := object.Endpoints{
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Subsets: []object.EndpointSubset{
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{
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Addresses: []object.EndpointAddress{
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{IP: "10.0.0.100", Hostname: "ep1a"}, // duplicate endpointslice address
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},
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Ports: []object.EndpointPort{
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{Port: 80, Protocol: "tcp", Name: "http"},
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},
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},
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},
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Name: "svc1-ccccc",
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Namespace: "testns",
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Index: object.EndpointsKey("svc1", "testns"),
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}
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ep2 := object.Endpoints{
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Subsets: []object.EndpointSubset{
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{
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Addresses: []object.EndpointAddress{
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{IP: "10.0.0.99", Hostname: "double-ep"}, // this endpoint is used by two services
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},
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Ports: []object.EndpointPort{
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{Port: 80, Protocol: "tcp", Name: "http"},
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},
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},
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},
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Name: "svc2-slice1",
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Namespace: "testns",
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Index: object.EndpointsKey("svc2", "testns"),
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}
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switch ip {
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case "1234:abcd::1":
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fallthrough
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case "fd00:77:30::a":
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fallthrough
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case "fd00:77:30::2:9ba6":
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return []*object.Endpoints{&ep1s2}
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case "10.0.0.100": // two EndpointSlices for a Service contain this IP (EndpointSlice skew)
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return []*object.Endpoints{&ep1s1, &ep1s3}
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case "10.0.0.99": // two different Services select this IP
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return []*object.Endpoints{&ep1s1, &ep2}
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}
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return nil
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}
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func (APIConnReverseTest) GetNodeByName(ctx context.Context, name string) (*api.Node, error) {
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return &api.Node{
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ObjectMeta: meta.ObjectMeta{
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Name: "test.node.foo.bar",
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},
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}, nil
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}
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func (APIConnReverseTest) 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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func TestReverse(t *testing.T) {
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k := New([]string{"cluster.local.", "0.10.in-addr.arpa.", "168.192.in-addr.arpa.", "0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.d.c.b.a.4.3.2.1.ip6.arpa.", "0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.3.0.0.7.7.0.0.0.0.d.f.ip6.arpa."})
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k.APIConn = &APIConnReverseTest{}
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tests := []test.Case{
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{
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Qname: "100.0.0.10.in-addr.arpa.", Qtype: dns.TypePTR,
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Rcode: dns.RcodeSuccess,
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Answer: []dns.RR{
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test.PTR("100.0.0.10.in-addr.arpa. 5 IN PTR ep1a.svc1.testns.svc.cluster.local."),
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},
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},
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{
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Qname: "100.1.168.192.in-addr.arpa.", Qtype: dns.TypePTR,
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Rcode: dns.RcodeSuccess,
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Answer: []dns.RR{
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test.PTR("100.1.168.192.in-addr.arpa. 5 IN PTR svc1.testns.svc.cluster.local."),
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},
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},
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{ // A PTR record query for an existing ipv6 endpoint should return a record
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Qname: "1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.d.c.b.a.4.3.2.1.ip6.arpa.", Qtype: dns.TypePTR,
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Rcode: dns.RcodeSuccess,
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Answer: []dns.RR{
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test.PTR("1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.d.c.b.a.4.3.2.1.ip6.arpa. 5 IN PTR ep1b.svc1.testns.svc.cluster.local."),
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},
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},
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{ // A PTR record query for an existing ipv6 endpoint should return a record
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Qname: "a.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.3.0.0.7.7.0.0.0.0.d.f.ip6.arpa.", Qtype: dns.TypePTR,
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Rcode: dns.RcodeSuccess,
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Answer: []dns.RR{
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test.PTR("a.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.3.0.0.7.7.0.0.0.0.d.f.ip6.arpa. 5 IN PTR ip6svc1ex.svc1.testns.svc.cluster.local."),
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},
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},
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{ // A PTR record query for an existing ipv6 endpoint should return a record
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Qname: "6.a.b.9.2.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.3.0.0.7.7.0.0.0.0.d.f.ip6.arpa.", Qtype: dns.TypePTR,
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Rcode: dns.RcodeSuccess,
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Answer: []dns.RR{
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test.PTR("6.a.b.9.2.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.3.0.0.7.7.0.0.0.0.d.f.ip6.arpa. 5 IN PTR ip6svc1in.svc1.testns.svc.cluster.local."),
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},
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},
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{
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Qname: "101.0.0.10.in-addr.arpa.", Qtype: dns.TypePTR,
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Rcode: dns.RcodeNameError,
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Ns: []dns.RR{
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test.SOA("0.10.in-addr.arpa. 5 IN SOA ns.dns.0.10.in-addr.arpa. hostmaster.0.10.in-addr.arpa. 1502782828 7200 1800 86400 5"),
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},
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},
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{
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Qname: "example.org.cluster.local.", Qtype: dns.TypePTR,
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Rcode: dns.RcodeNameError,
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Ns: []dns.RR{
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test.SOA("cluster.local. 5 IN SOA ns.dns.cluster.local. hostmaster.cluster.local. 1502989566 7200 1800 86400 5"),
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},
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},
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{
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Qname: "svc1.testns.svc.cluster.local.", Qtype: dns.TypePTR,
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Rcode: dns.RcodeSuccess,
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Ns: []dns.RR{
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test.SOA("cluster.local. 5 IN SOA ns.dns.cluster.local. hostmaster.cluster.local. 1502989566 7200 1800 86400 5"),
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},
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},
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{
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Qname: "svc1.testns.svc.0.10.in-addr.arpa.", Qtype: dns.TypeA,
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Rcode: dns.RcodeNameError,
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Ns: []dns.RR{
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test.SOA("0.10.in-addr.arpa. 5 IN SOA ns.dns.0.10.in-addr.arpa. hostmaster.0.10.in-addr.arpa. 1502989566 7200 1800 86400 5"),
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},
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},
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{
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Qname: "100.0.0.10.cluster.local.", Qtype: dns.TypePTR,
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Rcode: dns.RcodeNameError,
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Ns: []dns.RR{
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test.SOA("cluster.local. 5 IN SOA ns.dns.cluster.local. hostmaster.cluster.local. 1502989566 7200 1800 86400 5"),
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},
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},
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{
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Qname: "99.0.0.10.in-addr.arpa.", Qtype: dns.TypePTR,
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Rcode: dns.RcodeSuccess,
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Answer: []dns.RR{
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test.PTR("99.0.0.10.in-addr.arpa. 5 IN PTR double-ep.svc1.testns.svc.cluster.local."),
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test.PTR("99.0.0.10.in-addr.arpa. 5 IN PTR double-ep.svc2.testns.svc.cluster.local."),
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},
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},
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}
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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 := k.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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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: %s %d", i, r.Question[0].Name, r.Question[0].Qtype)
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}
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if err := test.SortAndCheck(resp, tc); err != nil {
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t.Error(err)
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}
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}
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}
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