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|
package kubernetes
import (
"context"
"net"
"strconv"
"testing"
"github.com/coredns/coredns/plugin/test"
"github.com/miekg/dns"
api "k8s.io/api/core/v1"
meta "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/kubernetes/fake"
)
func inc(ip net.IP) {
for j := len(ip) - 1; j >= 0; j-- {
ip[j]++
if ip[j] > 0 {
break
}
}
}
func BenchmarkController(b *testing.B) {
client := fake.NewSimpleClientset()
dco := dnsControlOpts{
zones: []string{"cluster.local."},
}
ctx := context.Background()
controller := newdnsController(ctx, client, dco)
cidr := "10.0.0.0/19"
// Add resources
generateEndpoints(cidr, client)
generateSvcs(cidr, "all", client)
m := new(dns.Msg)
m.SetQuestion("svc1.testns.svc.cluster.local.", dns.TypeA)
k := New([]string{"cluster.local."})
k.APIConn = controller
rw := &test.ResponseWriter{}
b.ResetTimer()
for i := 0; i < b.N; i++ {
k.ServeDNS(ctx, rw, m)
}
}
func generateEndpoints(cidr string, client kubernetes.Interface) {
// https://groups.google.com/d/msg/golang-nuts/zlcYA4qk-94/TWRFHeXJCcYJ
ip, ipnet, err := net.ParseCIDR(cidr)
if err != nil {
log.Fatal(err)
}
count := 1
ep := &api.Endpoints{
Subsets: []api.EndpointSubset{{
Ports: []api.EndpointPort{
{
Port: 80,
Protocol: "tcp",
Name: "http",
},
},
}},
ObjectMeta: meta.ObjectMeta{
Namespace: "testns",
},
}
ctx := context.TODO()
for ip := ip.Mask(ipnet.Mask); ipnet.Contains(ip); inc(ip) {
ep.Subsets[0].Addresses = []api.EndpointAddress{
{
IP: ip.String(),
Hostname: "foo" + strconv.Itoa(count),
},
}
ep.ObjectMeta.Name = "svc" + strconv.Itoa(count)
client.CoreV1().Endpoints("testns").Create(ctx, ep, meta.CreateOptions{})
count++
}
}
func generateSvcs(cidr string, svcType string, client kubernetes.Interface) {
ip, ipnet, err := net.ParseCIDR(cidr)
if err != nil {
log.Fatal(err)
}
count := 1
switch svcType {
case "clusterip":
for ip := ip.Mask(ipnet.Mask); ipnet.Contains(ip); inc(ip) {
createClusterIPSvc(count, client, ip)
count++
}
case "headless":
for ip := ip.Mask(ipnet.Mask); ipnet.Contains(ip); inc(ip) {
createHeadlessSvc(count, client, ip)
count++
}
case "external":
for ip := ip.Mask(ipnet.Mask); ipnet.Contains(ip); inc(ip) {
createExternalSvc(count, client, ip)
count++
}
default:
for ip := ip.Mask(ipnet.Mask); ipnet.Contains(ip); inc(ip) {
if count%3 == 0 {
createClusterIPSvc(count, client, ip)
} else if count%3 == 1 {
createHeadlessSvc(count, client, ip)
} else if count%3 == 2 {
createExternalSvc(count, client, ip)
}
count++
}
}
}
func createClusterIPSvc(suffix int, client kubernetes.Interface, ip net.IP) {
ctx := context.TODO()
client.CoreV1().Services("testns").Create(ctx, &api.Service{
ObjectMeta: meta.ObjectMeta{
Name: "svc" + strconv.Itoa(suffix),
Namespace: "testns",
},
Spec: api.ServiceSpec{
ClusterIP: ip.String(),
Ports: []api.ServicePort{{
Name: "http",
Protocol: "tcp",
Port: 80,
}},
},
}, meta.CreateOptions{})
}
func createHeadlessSvc(suffix int, client kubernetes.Interface, ip net.IP) {
ctx := context.TODO()
client.CoreV1().Services("testns").Create(ctx, &api.Service{
ObjectMeta: meta.ObjectMeta{
Name: "hdls" + strconv.Itoa(suffix),
Namespace: "testns",
},
Spec: api.ServiceSpec{
ClusterIP: api.ClusterIPNone,
},
}, meta.CreateOptions{})
}
func createExternalSvc(suffix int, client kubernetes.Interface, ip net.IP) {
ctx := context.TODO()
client.CoreV1().Services("testns").Create(ctx, &api.Service{
ObjectMeta: meta.ObjectMeta{
Name: "external" + strconv.Itoa(suffix),
Namespace: "testns",
},
Spec: api.ServiceSpec{
ExternalName: "coredns" + strconv.Itoa(suffix) + ".io",
Ports: []api.ServicePort{{
Name: "http",
Protocol: "tcp",
Port: 80,
}},
Type: api.ServiceTypeExternalName,
},
}, meta.CreateOptions{})
}
|
