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package kubernetes
import (
"context"
"fmt"
"net"
"testing"
"github.com/coredns/coredns/plugin/kubernetes/object"
"github.com/miekg/dns"
api "k8s.io/api/core/v1"
)
type APIConnTest struct{}
func (APIConnTest) HasSynced() bool { return true }
func (APIConnTest) Run() {}
func (APIConnTest) Stop() error { return nil }
func (APIConnTest) PodIndex(string) []*object.Pod { return nil }
func (APIConnTest) SvcIndexReverse(string) []*object.Service { return nil }
func (APIConnTest) SvcExtIndexReverse(string) []*object.Service { return nil }
func (APIConnTest) EpIndex(string) []*object.Endpoints { return nil }
func (APIConnTest) EndpointsList() []*object.Endpoints { return nil }
func (APIConnTest) Modified(bool) int64 { return 0 }
func (a APIConnTest) SvcIndex(s string) []*object.Service {
switch s {
case "dns-service.kube-system":
return []*object.Service{a.ServiceList()[0]}
case "hdls-dns-service.kube-system":
return []*object.Service{a.ServiceList()[1]}
case "dns6-service.kube-system":
return []*object.Service{a.ServiceList()[2]}
}
return nil
}
var svcs = []*object.Service{
{
Name: "dns-service",
Namespace: "kube-system",
ClusterIPs: []string{"10.0.0.111"},
},
{
Name: "hdls-dns-service",
Namespace: "kube-system",
ClusterIPs: []string{api.ClusterIPNone},
},
{
Name: "dns6-service",
Namespace: "kube-system",
ClusterIPs: []string{"10::111"},
},
}
func (APIConnTest) ServiceList() []*object.Service {
return svcs
}
func (APIConnTest) EpIndexReverse(ip string) []*object.Endpoints {
if ip != "10.244.0.20" {
return nil
}
eps := []*object.Endpoints{
{
Name: "dns-service-slice1",
Namespace: "kube-system",
Index: object.EndpointsKey("dns-service", "kube-system"),
Subsets: []object.EndpointSubset{
{Addresses: []object.EndpointAddress{{IP: "10.244.0.20"}}},
},
},
{
Name: "hdls-dns-service-slice1",
Namespace: "kube-system",
Index: object.EndpointsKey("hdls-dns-service", "kube-system"),
Subsets: []object.EndpointSubset{
{Addresses: []object.EndpointAddress{{IP: "10.244.0.20"}}},
},
},
{
Name: "dns6-service-slice1",
Namespace: "kube-system",
Index: object.EndpointsKey("dns6-service", "kube-system"),
Subsets: []object.EndpointSubset{
{Addresses: []object.EndpointAddress{{IP: "10.244.0.20"}}},
},
},
}
return eps
}
func (APIConnTest) GetNodeByName(ctx context.Context, name string) (*api.Node, error) {
return &api.Node{}, nil
}
func (APIConnTest) GetNamespaceByName(name string) (*object.Namespace, error) {
return nil, fmt.Errorf("namespace not found")
}
func TestNsAddrs(t *testing.T) {
k := New([]string{"inter.webs.test."})
k.APIConn = &APIConnTest{}
k.localIPs = []net.IP{net.ParseIP("10.244.0.20")}
cdrs := k.nsAddrs(false, false, k.Zones[0])
if len(cdrs) != 3 {
t.Fatalf("Expected 3 results, got %v", len(cdrs))
}
cdr := cdrs[0]
expected := "10.0.0.111"
if cdr.(*dns.A).A.String() != expected {
t.Errorf("Expected 1st A to be %q, got %q", expected, cdr.(*dns.A).A.String())
}
expected = "dns-service.kube-system.svc.inter.webs.test."
if cdr.Header().Name != expected {
t.Errorf("Expected 1st Header Name to be %q, got %q", expected, cdr.Header().Name)
}
cdr = cdrs[1]
expected = "10.244.0.20"
if cdr.(*dns.A).A.String() != expected {
t.Errorf("Expected 2nd A to be %q, got %q", expected, cdr.(*dns.A).A.String())
}
expected = "10-244-0-20.hdls-dns-service.kube-system.svc.inter.webs.test."
if cdr.Header().Name != expected {
t.Errorf("Expected 2nd Header Name to be %q, got %q", expected, cdr.Header().Name)
}
cdr = cdrs[2]
expected = "10::111"
if cdr.(*dns.AAAA).AAAA.String() != expected {
t.Errorf("Expected AAAA to be %q, got %q", expected, cdr.(*dns.A).A.String())
}
expected = "dns6-service.kube-system.svc.inter.webs.test."
if cdr.Header().Name != expected {
t.Errorf("Expected AAAA Header Name to be %q, got %q", expected, cdr.Header().Name)
}
}
func TestNsAddrsExternalHeadless(t *testing.T) {
k := New([]string{"example.com."})
k.APIConn = &APIConnTest{}
k.localIPs = []net.IP{net.ParseIP("10.244.0.20")}
// there are only headless sevices
cdrs := k.nsAddrs(true, true, k.Zones[0])
if len(cdrs) != 1 {
t.Fatalf("Expected 0 results, got %v", cdrs)
}
cdr := cdrs[0]
expected := "10.244.0.20"
if cdr.(*dns.A).A.String() != expected {
t.Errorf("Expected A address to be %q, got %q", expected, cdr.(*dns.A).A.String())
}
expected = "10-244-0-20.hdls-dns-service.kube-system.example.com."
if cdr.Header().Name != expected {
t.Errorf("Expected record name to be %q, got %q", expected, cdr.Header().Name)
}
}
func TestNsAddrsExternal(t *testing.T) {
k := New([]string{"example.com."})
k.APIConn = &APIConnTest{}
k.localIPs = []net.IP{net.ParseIP("10.244.0.20")}
// initially no services have an external IP ...
cdrs := k.nsAddrs(true, false, k.Zones[0])
if len(cdrs) != 0 {
t.Fatalf("Expected 0 results, got %v", len(cdrs))
}
// Add an external IP to one of the services ...
svcs[0].ExternalIPs = []string{"1.2.3.4"}
cdrs = k.nsAddrs(true, false, k.Zones[0])
if len(cdrs) != 1 {
t.Fatalf("Expected 1 results, got %v", len(cdrs))
}
cdr := cdrs[0]
expected := "1.2.3.4"
if cdr.(*dns.A).A.String() != expected {
t.Errorf("Expected A address to be %q, got %q", expected, cdr.(*dns.A).A.String())
}
expected = "dns-service.kube-system.example.com."
if cdr.Header().Name != expected {
t.Errorf("Expected record name to be %q, got %q", expected, cdr.Header().Name)
}
}
func TestNsAddrsExternalWithPreexistingExternalIP(t *testing.T) {
k := New([]string{"example.com."})
k.APIConn = &APIConnTest{}
k.localIPs = []net.IP{net.ParseIP("10.244.0.20")}
svcs[0].ExternalIPs = []string{"1.2.3.4"}
// initially no services have an external IP ...
cdrs := k.nsAddrs(true, false, k.Zones[0])
if len(cdrs) != 1 {
t.Fatalf("Expected 1 results, got %v", len(cdrs))
}
if len(cdrs) != 1 {
t.Fatalf("Expected 1 results, got %v", len(cdrs))
}
cdr := cdrs[0]
expected := "1.2.3.4"
if cdr.(*dns.A).A.String() != expected {
t.Errorf("Expected A address to be %q, got %q", expected, cdr.(*dns.A).A.String())
}
expected = "dns-service.kube-system.example.com."
if cdr.Header().Name != expected {
t.Errorf("Expected record name to be %q, got %q", expected, cdr.Header().Name)
}
}
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