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Merge pull request #99713 from ankeesler/exec-plugin-integration-test

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Exec plugin integration test
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Kubernetes Prow Robot 2021-04-08 15:59:17 -07:00 committed by GitHub
commit a40da10099
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1 changed files with 256 additions and 44 deletions
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300
test/integration/client/exec_test.go
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@ -25,17 +25,21 @@ import (
"io/ioutil"
"net/http"
"os"
"reflect"
"strings"
"sync"
"testing"
"time"
"github.com/google/go-cmp/cmp"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/util/wait"
"k8s.io/client-go/informers"
clientset "k8s.io/client-go/kubernetes"
v1 "k8s.io/client-go/kubernetes/typed/core/v1"
"k8s.io/client-go/rest"
clientcmdapi "k8s.io/client-go/tools/clientcmd/api"
"k8s.io/client-go/transport"
"k8s.io/client-go/util/cert"
kubeapiservertesting "k8s.io/kubernetes/cmd/kube-apiserver/app/testing"
@ -44,6 +48,11 @@ import (
// This file tests the client-go credential plugin feature.
// These constants are used to communicate behavior to the testdata/exec-plugin.sh test fixture.
const (
outputEnvVar = "EXEC_PLUGIN_OUTPUT"
)
type roundTripperFunc func(*http.Request) (*http.Response, error)
func (f roundTripperFunc) RoundTrip(req *http.Request) (*http.Response, error) {
@ -67,35 +76,8 @@ func (s *syncedHeaderValues) get() [][]string {
return s.data
}
func TestExecPlugin(t *testing.T) {
// These constants are used to communicate behavior to the testdata/exec-plugin.sh test fixture.
const (
outputEnvVar = "EXEC_PLUGIN_OUTPUT"
)
const (
clientAuthorizedToken = "authorized-token"
clientUnauthorizedToken = "unauthorized-token"
)
certDir, err := ioutil.TempDir("", "kubernetes-client-exec-test-cert-dir-*")
if err != nil {
t.Fatal(err)
}
tokenFileName := writeTokenFile(t, clientAuthorizedToken)
clientCAFileName, clientSigningCert, clientSigningKey := writeCACertFiles(t, certDir)
clientCertFileName, clientKeyFileName := writeCerts(t, clientSigningCert, clientSigningKey, certDir, 30*time.Second)
result := kubeapiservertesting.StartTestServerOrDie(
t,
nil,
[]string{
"--token-auth-file", tokenFileName,
"--client-ca-file=" + clientCAFileName,
},
framework.SharedEtcd(),
)
t.Cleanup(result.TearDownFn)
func TestExecPluginViaClient(t *testing.T) {
result, clientAuthorizedToken, clientCertFileName, clientKeyFileName := startTestServer(t)
unauthorizedCert, unauthorizedKey, err := cert.GenerateSelfSignedCertKey("some-host", nil, nil)
if err != nil {
@ -224,11 +206,11 @@ func TestExecPlugin(t *testing.T) {
"clientCertificateData": %s,
"clientKeyData": %s
}
}`, clientUnauthorizedToken, read(t, clientCertFileName), read(t, clientKeyFileName)),
}`, "client-unauthorized-token", read(t, clientCertFileName), read(t, clientKeyFileName)),
},
}
},
wantAuthorizationHeaderValues: [][]string{{"Bearer " + clientUnauthorizedToken}},
wantAuthorizationHeaderValues: [][]string{{"Bearer client-unauthorized-token"}},
wantCertificate: loadX509KeyPair(clientCertFileName, clientKeyFileName),
},
{
@ -266,12 +248,12 @@ func TestExecPlugin(t *testing.T) {
"clientCertificateData": %q,
"clientKeyData": %q
}
}`, clientUnauthorizedToken, string(unauthorizedCert), string(unauthorizedKey)),
}`, "client-unauthorized-token", string(unauthorizedCert), string(unauthorizedKey)),
},
}
},
wantAuthorizationHeaderValues: [][]string{{"Bearer " + clientUnauthorizedToken}},
wantCertificate: x509KeyPair([]byte(unauthorizedCert), []byte(unauthorizedKey), true),
wantAuthorizationHeaderValues: [][]string{{"Bearer client-unauthorized-token"}},
wantCertificate: x509KeyPair(unauthorizedCert, unauthorizedKey, true),
wantClientErrorPrefix: "Unauthorized",
},
{
@ -337,17 +319,11 @@ func TestExecPlugin(t *testing.T) {
c.KeyData = unauthorizedKey
},
wantAuthorizationHeaderValues: [][]string{{"Bearer " + clientAuthorizedToken}},
wantCertificate: x509KeyPair([]byte(unauthorizedCert), []byte(unauthorizedKey), false),
wantCertificate: x509KeyPair(unauthorizedCert, unauthorizedKey, false),
},
}
for _, test := range tests {
t.Run(test.name, func(t *testing.T) {
tmpDir, err := ioutil.TempDir("", "kubernetes-client-exec-test-plugin-dir-*")
if err != nil {
t.Fatal(err)
}
defer os.RemoveAll(tmpDir)
var authorizationHeaderValues syncedHeaderValues
clientConfig := rest.AnonymousClientConfig(result.ClientConfig)
clientConfig.ExecProvider = &clientcmdapi.ExecConfig{
@ -355,12 +331,12 @@ func TestExecPlugin(t *testing.T) {
// TODO(ankeesler): move to v1 once exec plugins go GA.
APIVersion: "client.authentication.k8s.io/v1beta1",
}
clientConfig.Wrap(transport.WrapperFunc(func(rt http.RoundTripper) http.RoundTripper {
clientConfig.Wrap(func(rt http.RoundTripper) http.RoundTripper {
return roundTripperFunc(func(req *http.Request) (*http.Response, error) {
authorizationHeaderValues.append(req.Header.Values("Authorization"))
return rt.RoundTrip(req)
})
}))
})
if test.clientConfigFunc != nil {
test.clientConfigFunc(clientConfig)
@ -407,6 +383,176 @@ func TestExecPlugin(t *testing.T) {
}
}
// objectMetaSansResourceVersionComparer compares two metav1.ObjectMeta's except for their resource
// versions. Since the underlying integration test etcd is shared, these resource versions may jump
// past the next sequential number for sequential API calls in the test.
var objectMetaSansResourceVersionComparer = cmp.Comparer(func(a, b metav1.ObjectMeta) bool {
aa := a.DeepCopy()
bb := b.DeepCopy()
aa.ResourceVersion = ""
bb.ResourceVersion = ""
return cmp.Equal(aa, bb)
})
type oldNew struct {
old, new interface{}
}
var oldNewComparer = cmp.Comparer(func(a, b oldNew) bool {
return cmp.Equal(a.old, b.old, objectMetaSansResourceVersionComparer) &&
cmp.Equal(a.new, a.new, objectMetaSansResourceVersionComparer)
})
type informerSpy struct {
mu sync.Mutex
adds []interface{}
updates []oldNew
deletes []interface{}
}
func (es *informerSpy) OnAdd(obj interface{}) {
es.mu.Lock()
defer es.mu.Unlock()
es.adds = append(es.adds, obj)
}
func (es *informerSpy) OnUpdate(old, new interface{}) {
es.mu.Lock()
defer es.mu.Unlock()
es.updates = append(es.updates, oldNew{old: old, new: new})
}
func (es *informerSpy) OnDelete(obj interface{}) {
es.mu.Lock()
defer es.mu.Unlock()
es.deletes = append(es.deletes, obj)
}
// waitForEvents waits for adds, updates, and deletes to be filled with at least one event.
func (es *informerSpy) waitForEvents(t *testing.T) {
if err := wait.PollImmediate(time.Millisecond*250, time.Second*20, func() (bool, error) {
es.mu.Lock()
defer es.mu.Unlock()
return len(es.adds) > 0 && len(es.updates) > 0 && len(es.deletes) > 0, nil
}); err != nil {
t.Fatalf("failed to wait for events: %v", err)
}
}
func TestExecPluginViaInformer(t *testing.T) {
result, clientAuthorizedToken, clientCertFileName, clientKeyFileName := startTestServer(t)
ctx, cancel := context.WithTimeout(context.Background(), time.Second*60)
defer cancel()
adminClient := clientset.NewForConfigOrDie(result.ClientConfig)
ns := createNamespace(ctx, t, adminClient)
tests := []struct {
name string
clientConfigFunc func(*rest.Config)
wantAuthorizationHeaderValues [][]string
wantCertificate *tls.Certificate
}{
{
name: "authorized token",
clientConfigFunc: func(c *rest.Config) {
c.ExecProvider.Env = []clientcmdapi.ExecEnvVar{
{
Name: outputEnvVar,
Value: fmt.Sprintf(`{
"kind": "ExecCredential",
"apiVersion": "client.authentication.k8s.io/v1beta1",
"status": {
"token": %q
}
}`, clientAuthorizedToken),
},
}
},
},
{
name: "authorized certificate",
clientConfigFunc: func(c *rest.Config) {
c.ExecProvider.Env = []clientcmdapi.ExecEnvVar{
{
Name: outputEnvVar,
Value: fmt.Sprintf(`{
"kind": "ExecCredential",
"apiVersion": "client.authentication.k8s.io/v1beta1",
"status": {
"clientCertificateData": %s,
"clientKeyData": %s
}
}`, read(t, clientCertFileName), read(t, clientKeyFileName)),
},
}
},
},
}
for _, test := range tests {
t.Run(test.name, func(t *testing.T) {
clientConfig := rest.AnonymousClientConfig(result.ClientConfig)
clientConfig.ExecProvider = &clientcmdapi.ExecConfig{
Command: "testdata/exec-plugin.sh",
// TODO(ankeesler): move to v1 once exec plugins go GA.
APIVersion: "client.authentication.k8s.io/v1beta1",
}
if test.clientConfigFunc != nil {
test.clientConfigFunc(clientConfig)
}
client := clientset.NewForConfigOrDie(clientConfig)
informerSpy := startConfigMapInformer(ctx, t, client, ns.Name)
createdCM, updatedCM, deletedCM := createUpdateDeleteConfigMap(ctx, t, client.CoreV1().ConfigMaps(ns.Name))
informerSpy.waitForEvents(t)
// Validate that the informer was called correctly.
if diff := cmp.Diff([]interface{}{createdCM}, informerSpy.adds, objectMetaSansResourceVersionComparer); diff != "" {
t.Errorf("unexpected add event(s), -want, +got:\n%s", diff)
}
if diff := cmp.Diff([]oldNew{{createdCM, updatedCM}}, informerSpy.updates, oldNewComparer); diff != "" {
t.Errorf("unexpected update event(s), -want, +got:\n%s", diff)
}
if diff := cmp.Diff([]interface{}{deletedCM}, informerSpy.deletes, objectMetaSansResourceVersionComparer); diff != "" {
t.Errorf("unexpected deleted event(s), -want, +got:\n%s", diff)
}
})
}
}
func startTestServer(t *testing.T) (result *kubeapiservertesting.TestServer, clientAuthorizedToken string, clientCertFileName string, clientKeyFileName string) {
certDir, err := ioutil.TempDir("", "kubernetes-client-exec-test-cert-dir-*")
if err != nil {
t.Fatal(err)
}
t.Cleanup(func() {
if err := os.RemoveAll(certDir); err != nil {
t.Error(err)
}
})
clientAuthorizedToken = "client-authorized-token"
tokenFileName := writeTokenFile(t, clientAuthorizedToken)
clientCAFileName, clientSigningCert, clientSigningKey := writeCACertFiles(t, certDir)
clientCertFileName, clientKeyFileName = writeCerts(t, clientSigningCert, clientSigningKey, certDir, 30*time.Second)
result = kubeapiservertesting.StartTestServerOrDie(
t,
nil,
[]string{
"--token-auth-file", tokenFileName,
"--client-ca-file=" + clientCAFileName,
},
framework.SharedEtcd(),
)
t.Cleanup(result.TearDownFn)
return
}
func writeTokenFile(t *testing.T, goodToken string) string {
t.Helper()
@ -464,3 +610,69 @@ func loadX509KeyPair(certFile, keyFile string) *tls.Certificate {
}
return &cert
}
func createNamespace(ctx context.Context, t *testing.T, client clientset.Interface) *corev1.Namespace {
t.Helper()
ns, err := client.CoreV1().Namespaces().Create(
ctx,
&corev1.Namespace{ObjectMeta: metav1.ObjectMeta{Name: "test-exec-plugin-with-informer-ns"}},
metav1.CreateOptions{},
)
if err != nil {
t.Fatal(err)
}
t.Cleanup(func() {
// Use a new context since the one passed to this function would have timed out.
ctx, cancel := context.WithTimeout(context.Background(), time.Second*10)
defer cancel()
if err := client.CoreV1().Namespaces().Delete(ctx, ns.Name, metav1.DeleteOptions{}); err != nil {
t.Error(err)
}
})
return ns
}
func startConfigMapInformer(ctx context.Context, t *testing.T, client clientset.Interface, namespace string) *informerSpy {
t.Helper()
var informerSpy informerSpy
informerFactory := informers.NewSharedInformerFactoryWithOptions(client, 0, informers.WithNamespace(namespace))
informerFactory.Core().V1().ConfigMaps().Informer().AddEventHandler(&informerSpy)
informerFactory.Start(ctx.Done())
synced := informerFactory.WaitForCacheSync(ctx.Done())
if len(synced) != 1 {
t.Fatalf("expected only 1 synced type, got %v", synced)
}
if cmSynced, ok := synced[reflect.TypeOf(&corev1.ConfigMap{})]; !(cmSynced && ok) {
t.Fatalf("expected ConfigMaps to be synced, got %v", synced)
}
return &informerSpy
}
func createUpdateDeleteConfigMap(ctx context.Context, t *testing.T, cms v1.ConfigMapInterface) (created, updated, deleted *corev1.ConfigMap) {
t.Helper()
var err error
created, err = cms.Create(ctx, &corev1.ConfigMap{ObjectMeta: metav1.ObjectMeta{Name: "cm"}}, metav1.CreateOptions{})
if err != nil {
t.Fatal(err)
}
updated = created.DeepCopy()
updated.Annotations = map[string]string{"tuna": "fish"}
updated, err = cms.Update(ctx, updated, metav1.UpdateOptions{})
if err != nil {
t.Fatal(err)
}
if err := cms.Delete(ctx, updated.Name, metav1.DeleteOptions{}); err != nil {
t.Fatal(err)
}
deleted = updated.DeepCopy()
return created, updated, deleted
}