/* Copyright 2018 The Kubernetes Authors. Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */ package testing import ( "crypto/tls" "crypto/x509" "encoding/json" "net/http" "net/http/httptest" "regexp" "strconv" "strings" "testing" "time" "k8s.io/api/admission/v1beta1" metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" "k8s.io/apiserver/pkg/admission/plugin/webhook/testcerts" testingclock "k8s.io/utils/clock/testing" ) // NewTestServerWithHandler returns a webhook test HTTPS server // which uses given handler function to handle requests func NewTestServerWithHandler(t testing.TB, handler func(http.ResponseWriter, *http.Request)) *httptest.Server { // Create the test webhook server sCert, err := tls.X509KeyPair(testcerts.ServerCert, testcerts.ServerKey) if err != nil { t.Error(err) t.FailNow() } rootCAs := x509.NewCertPool() rootCAs.AppendCertsFromPEM(testcerts.CACert) testServer := httptest.NewUnstartedServer(http.HandlerFunc(handler)) testServer.TLS = &tls.Config{ Certificates: []tls.Certificate{sCert}, ClientCAs: rootCAs, ClientAuth: tls.RequireAndVerifyClientCert, } return testServer } // NewTestServer returns a webhook test HTTPS server with fixed webhook test certs. func NewTestServer(t testing.TB) *httptest.Server { return NewTestServerWithHandler(t, webhookHandler) } func webhookHandler(w http.ResponseWriter, r *http.Request) { // fmt.Printf("got req: %v\n", r.URL.Path) switch r.URL.Path { case "/internalErr": http.Error(w, "webhook internal server error", http.StatusInternalServerError) return case "/invalidReq": w.WriteHeader(http.StatusSwitchingProtocols) w.Write([]byte("webhook invalid request")) return case "/invalidResp": w.Header().Set("Content-Type", "application/json") w.Write([]byte("webhook invalid response")) case "/disallow": w.Header().Set("Content-Type", "application/json") json.NewEncoder(w).Encode(&v1beta1.AdmissionReview{ Response: &v1beta1.AdmissionResponse{ Allowed: false, Result: &metav1.Status{ Code: http.StatusForbidden, }, }, }) case "/disallowReason": w.Header().Set("Content-Type", "application/json") json.NewEncoder(w).Encode(&v1beta1.AdmissionReview{ Response: &v1beta1.AdmissionResponse{ Allowed: false, Result: &metav1.Status{ Message: "you shall not pass", Code: http.StatusForbidden, }, }, }) case "/shouldNotBeCalled": w.Header().Set("Content-Type", "application/json") json.NewEncoder(w).Encode(&v1beta1.AdmissionReview{ Response: &v1beta1.AdmissionResponse{ Allowed: false, Result: &metav1.Status{ Message: "doesn't expect labels to match object selector", Code: http.StatusForbidden, }, }, }) case "/allow": w.Header().Set("Content-Type", "application/json") json.NewEncoder(w).Encode(&v1beta1.AdmissionReview{ Response: &v1beta1.AdmissionResponse{ Allowed: true, AuditAnnotations: map[string]string{ "key1": "value1", }, }, }) case "/removeLabel": w.Header().Set("Content-Type", "application/json") pt := v1beta1.PatchTypeJSONPatch json.NewEncoder(w).Encode(&v1beta1.AdmissionReview{ Response: &v1beta1.AdmissionResponse{ Allowed: true, PatchType: &pt, Patch: []byte(`[{"op": "remove", "path": "/metadata/labels/remove"}]`), AuditAnnotations: map[string]string{ "key1": "value1", }, }, }) case "/addLabel": w.Header().Set("Content-Type", "application/json") pt := v1beta1.PatchTypeJSONPatch json.NewEncoder(w).Encode(&v1beta1.AdmissionReview{ Response: &v1beta1.AdmissionResponse{ Allowed: true, PatchType: &pt, Patch: []byte(`[{"op": "add", "path": "/metadata/labels/added", "value": "test"}]`), }, }) case "/invalidPatch": w.Header().Set("Content-Type", "application/json") pt := v1beta1.PatchTypeJSONPatch json.NewEncoder(w).Encode(&v1beta1.AdmissionReview{ Response: &v1beta1.AdmissionResponse{ Allowed: true, PatchType: &pt, Patch: []byte(`[{`), }, }) case "/invalidMutation": w.Header().Set("Content-Type", "application/json") pt := v1beta1.PatchTypeJSONPatch json.NewEncoder(w).Encode(&v1beta1.AdmissionReview{ Response: &v1beta1.AdmissionResponse{ Allowed: true, PatchType: &pt, Patch: []byte(`[{"op": "add", "CORRUPTED_KEY":}]`), }, }) case "/nilResponse": w.Header().Set("Content-Type", "application/json") json.NewEncoder(w).Encode(&v1beta1.AdmissionReview{}) case "/invalidAnnotation": w.Header().Set("Content-Type", "application/json") json.NewEncoder(w).Encode(&v1beta1.AdmissionReview{ Response: &v1beta1.AdmissionResponse{ Allowed: true, AuditAnnotations: map[string]string{ "invalid*key": "value1", }, }, }) case "/noop": w.Header().Set("Content-Type", "application/json") json.NewEncoder(w).Encode(&v1beta1.AdmissionReview{ Response: &v1beta1.AdmissionResponse{ Allowed: true, }, }) default: http.NotFound(w, r) } } // ClockSteppingWebhookHandler given a fakeClock returns a request handler // that moves time in given clock by an amount specified in the webhook request func ClockSteppingWebhookHandler(t testing.TB, fakeClock *testingclock.FakeClock) func(http.ResponseWriter, *http.Request) { return func(w http.ResponseWriter, r *http.Request) { path := r.URL.Path validPath := regexp.MustCompile(`^/(?:allow|disallow)/(\d{1,10})$`) if !validPath.MatchString(path) { t.Errorf("error in test case, wrong webhook url path: '%q' expected to match: '%q'", path, validPath.String()) t.FailNow() } delay, _ := strconv.ParseInt(validPath.FindStringSubmatch(path)[1], 0, 64) fakeClock.Step(time.Duration(delay)) w.Header().Set("Content-Type", "application/json") if strings.HasPrefix(path, "/allow/") { json.NewEncoder(w).Encode(&v1beta1.AdmissionReview{ Response: &v1beta1.AdmissionResponse{ Allowed: true, AuditAnnotations: map[string]string{ "key1": "value1", }, }, }) return } json.NewEncoder(w).Encode(&v1beta1.AdmissionReview{ Response: &v1beta1.AdmissionResponse{ Allowed: false, Result: &metav1.Status{ Code: http.StatusForbidden, }, }, }) } }