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Code Issues Projects Releases Wiki Activity

Upgrade AdmissionReview e2e test image to also support v1

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This commit is contained in:
Joe Betz 2019-08-11 13:15:33 -07:00
parent f4e39afea0
commit 4f7543e42a
18 changed files with 353 additions and 105 deletions
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7
pkg/apis/admission/fuzzer/BUILD
View File

@ -9,7 +9,12 @@ go_library(
name = "go_default_library",
srcs = ["fuzzer.go"],
importpath = "k8s.io/kubernetes/pkg/apis/admission/fuzzer",
deps = ["//staging/src/k8s.io/apimachinery/pkg/runtime/serializer:go_default_library"],
deps = [
"//staging/src/k8s.io/apimachinery/pkg/apis/meta/v1/unstructured:go_default_library",
"//staging/src/k8s.io/apimachinery/pkg/runtime:go_default_library",
"//staging/src/k8s.io/apimachinery/pkg/runtime/serializer:go_default_library",
"//vendor/github.com/google/gofuzz:go_default_library",
],
)
filegroup(

15
pkg/apis/admission/fuzzer/fuzzer.go
View File

@ -17,10 +17,23 @@ limitations under the License.
package fuzzer
import (
fuzz "github.com/google/gofuzz"
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
"k8s.io/apimachinery/pkg/runtime"
runtimeserializer "k8s.io/apimachinery/pkg/runtime/serializer"
)
// Funcs returns the fuzzer functions for the admission api group.
var Funcs = func(codecs runtimeserializer.CodecFactory) []interface{} {
return []interface{}{}
return []interface{}{
func(s *runtime.RawExtension, c fuzz.Continue) {
u := &unstructured.Unstructured{Object: map[string]interface{}{
"apiVersion": "unknown.group/unknown",
"kind": "Something",
"somekey": "somevalue",
}}
s.Object = u
},
}
}

2
test/images/agnhost/VERSION
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@ -1 +1 @@
2.4
2.5

BIN
test/images/agnhost/agnhost Executable file
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Binary file not shown.

11
test/images/agnhost/crd-conversion-webhook/main.go
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@ -17,6 +17,7 @@ limitations under the License.
package crdconvwebhook
import (
"fmt"
"net/http"
"github.com/spf13/cobra"
@ -27,6 +28,7 @@ import (
var (
certFile string
keyFile string
port int
)
// CmdCrdConversionWebhook is used by agnhost Cobra.
@ -48,6 +50,8 @@ func init() {
"after server cert.")
CmdCrdConversionWebhook.Flags().StringVar(&keyFile, "tls-private-key-file", "",
"File containing the default x509 private key matching --tls-cert-file.")
CmdCrdConversionWebhook.Flags().IntVar(&port, "port", 443,
"Secure port that the webhook listens on")
}
// Config contains the server (the webhook) cert and key.
@ -62,8 +66,11 @@ func main(cmd *cobra.Command, args []string) {
http.HandleFunc("/crdconvert", converter.ServeExampleConvert)
clientset := getClient()
server := &http.Server{
Addr: ":443",
Addr: fmt.Sprintf(":%d", port),
TLSConfig: configTLS(config, clientset),
}
server.ListenAndServeTLS("", "")
err := server.ListenAndServeTLS("", "")
if err != nil {
panic(err)
}
}

10
test/images/agnhost/webhook/BUILD
View File

@ -8,6 +8,7 @@ go_library(
"alwaysdeny.go",
"config.go",
"configmap.go",
"convert.go",
"crd.go",
"customresource.go",
"main.go",
@ -17,7 +18,9 @@ go_library(
importpath = "k8s.io/kubernetes/test/images/agnhost/webhook",
visibility = ["//visibility:public"],
deps = [
"//staging/src/k8s.io/api/admission/v1:go_default_library",
"//staging/src/k8s.io/api/admission/v1beta1:go_default_library",
"//staging/src/k8s.io/api/admissionregistration/v1:go_default_library",
"//staging/src/k8s.io/api/admissionregistration/v1beta1:go_default_library",
"//staging/src/k8s.io/api/core/v1:go_default_library",
"//staging/src/k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1beta1:go_default_library",
@ -48,15 +51,22 @@ go_test(
name = "go_default_test",
srcs = [
"addlabel_test.go",
"convert_test.go",
"patch_test.go",
],
embed = [":go_default_library"],
deps = [
"//pkg/apis/admission/fuzzer:go_default_library",
"//staging/src/k8s.io/api/admission/v1:go_default_library",
"//staging/src/k8s.io/api/admission/v1beta1:go_default_library",
"//staging/src/k8s.io/api/core/v1:go_default_library",
"//staging/src/k8s.io/apimachinery/pkg/api/apitesting/fuzzer:go_default_library",
"//staging/src/k8s.io/apimachinery/pkg/apis/meta/v1:go_default_library",
"//staging/src/k8s.io/apimachinery/pkg/apis/meta/v1/unstructured:go_default_library",
"//staging/src/k8s.io/apimachinery/pkg/runtime:go_default_library",
"//staging/src/k8s.io/apimachinery/pkg/runtime/serializer:go_default_library",
"//staging/src/k8s.io/apimachinery/pkg/util/diff:go_default_library",
"//vendor/github.com/evanphx/json-patch:go_default_library",
"//vendor/github.com/google/gofuzz:go_default_library",
],
)

10
test/images/agnhost/webhook/addlabel.go
View File

@ -19,7 +19,7 @@ package webhook
import (
"encoding/json"
"k8s.io/api/admission/v1beta1"
"k8s.io/api/admission/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/klog"
)
@ -37,7 +37,7 @@ const (
)
// Add a label {"added-label": "yes"} to the object
func addLabel(ar v1beta1.AdmissionReview) *v1beta1.AdmissionResponse {
func addLabel(ar v1.AdmissionReview) *v1.AdmissionResponse {
klog.V(2).Info("calling add-label")
obj := struct {
metav1.ObjectMeta `json:"metadata,omitempty"`
@ -46,13 +46,13 @@ func addLabel(ar v1beta1.AdmissionReview) *v1beta1.AdmissionResponse {
err := json.Unmarshal(raw, &obj)
if err != nil {
klog.Error(err)
return toAdmissionResponse(err)
return toV1AdmissionResponse(err)
}
reviewResponse := v1beta1.AdmissionResponse{}
reviewResponse := v1.AdmissionResponse{}
reviewResponse.Allowed = true
pt := v1beta1.PatchTypeJSONPatch
pt := v1.PatchTypeJSONPatch
labelValue, hasLabel := obj.ObjectMeta.Labels["added-label"]
switch {
case len(obj.ObjectMeta.Labels) == 0:

4
test/images/agnhost/webhook/addlabel_test.go
View File

@ -22,7 +22,7 @@ import (
"testing"
jsonpatch "github.com/evanphx/json-patch"
"k8s.io/api/admission/v1beta1"
"k8s.io/api/admission/v1"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
@ -58,7 +58,7 @@ func TestAddLabel(t *testing.T) {
if err != nil {
t.Fatal(err)
}
review := v1beta1.AdmissionReview{Request: &v1beta1.AdmissionRequest{Object: runtime.RawExtension{Raw: raw}}}
review := v1.AdmissionReview{Request: &v1.AdmissionRequest{Object: runtime.RawExtension{Raw: raw}}}
response := addLabel(review)
if response.Patch != nil {
patchObj, err := jsonpatch.DecodePatch([]byte(response.Patch))

6
test/images/agnhost/webhook/alwaysallow.go
View File

@ -19,17 +19,17 @@ package webhook
import (
"time"
"k8s.io/api/admission/v1beta1"
"k8s.io/api/admission/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/klog"
)
// alwaysAllowDelayFiveSeconds sleeps for five seconds and allows all requests made to this function.
func alwaysAllowDelayFiveSeconds(ar v1beta1.AdmissionReview) *v1beta1.AdmissionResponse {
func alwaysAllowDelayFiveSeconds(ar v1.AdmissionReview) *v1.AdmissionResponse {
klog.V(2).Info("always-allow-with-delay sleeping for 5 seconds")
time.Sleep(5 * time.Second)
klog.V(2).Info("calling always-allow")
reviewResponse := v1beta1.AdmissionResponse{}
reviewResponse := v1.AdmissionResponse{}
reviewResponse.Allowed = true
reviewResponse.Result = &metav1.Status{Message: "this webhook allows all requests"}
return &reviewResponse

6
test/images/agnhost/webhook/alwaysdeny.go
View File

@ -17,15 +17,15 @@ limitations under the License.
package webhook
import (
"k8s.io/api/admission/v1beta1"
"k8s.io/api/admission/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/klog"
)
// alwaysDeny all requests made to this function.
func alwaysDeny(ar v1beta1.AdmissionReview) *v1beta1.AdmissionResponse {
func alwaysDeny(ar v1.AdmissionReview) *v1.AdmissionResponse {
klog.V(2).Info("calling always-deny")
reviewResponse := v1beta1.AdmissionResponse{}
reviewResponse := v1.AdmissionResponse{}
reviewResponse.Allowed = false
reviewResponse.Result = &metav1.Status{Message: "this webhook denies all requests"}
return &reviewResponse

22
test/images/agnhost/webhook/configmap.go
View File

@ -17,7 +17,7 @@ limitations under the License.
package webhook
import (
"k8s.io/api/admission/v1beta1"
v1 "k8s.io/api/admission/v1"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/klog"
@ -33,7 +33,7 @@ const (
)
// deny configmaps with specific key-value pair.
func admitConfigMaps(ar v1beta1.AdmissionReview) *v1beta1.AdmissionResponse {
func admitConfigMaps(ar v1.AdmissionReview) *v1.AdmissionResponse {
klog.V(2).Info("admitting configmaps")
configMapResource := metav1.GroupVersionResource{Group: "", Version: "v1", Resource: "configmaps"}
if ar.Request.Resource != configMapResource {
@ -42,7 +42,7 @@ func admitConfigMaps(ar v1beta1.AdmissionReview) *v1beta1.AdmissionResponse {
}
var raw []byte
if ar.Request.Operation == v1beta1.Delete {
if ar.Request.Operation == v1.Delete {
raw = ar.Request.OldObject.Raw
} else {
raw = ar.Request.Object.Raw
@ -51,19 +51,19 @@ func admitConfigMaps(ar v1beta1.AdmissionReview) *v1beta1.AdmissionResponse {
deserializer := codecs.UniversalDeserializer()
if _, _, err := deserializer.Decode(raw, nil, &configmap); err != nil {
klog.Error(err)
return toAdmissionResponse(err)
return toV1AdmissionResponse(err)
}
reviewResponse := v1beta1.AdmissionResponse{}
reviewResponse := v1.AdmissionResponse{}
reviewResponse.Allowed = true
for k, v := range configmap.Data {
if k == "webhook-e2e-test" && v == "webhook-disallow" &&
(ar.Request.Operation == v1beta1.Create || ar.Request.Operation == v1beta1.Update) {
(ar.Request.Operation == v1.Create || ar.Request.Operation == v1.Update) {
reviewResponse.Allowed = false
reviewResponse.Result = &metav1.Status{
Reason: "the configmap contains unwanted key and value",
}
}
if k == "webhook-e2e-test" && v == "webhook-nondeletable" && ar.Request.Operation == v1beta1.Delete {
if k == "webhook-e2e-test" && v == "webhook-nondeletable" && ar.Request.Operation == v1.Delete {
reviewResponse.Allowed = false
reviewResponse.Result = &metav1.Status{
Reason: "the configmap cannot be deleted because it contains unwanted key and value",
@ -73,7 +73,7 @@ func admitConfigMaps(ar v1beta1.AdmissionReview) *v1beta1.AdmissionResponse {
return &reviewResponse
}
func mutateConfigmaps(ar v1beta1.AdmissionReview) *v1beta1.AdmissionResponse {
func mutateConfigmaps(ar v1.AdmissionReview) *v1.AdmissionResponse {
klog.V(2).Info("mutating configmaps")
configMapResource := metav1.GroupVersionResource{Group: "", Version: "v1", Resource: "configmaps"}
if ar.Request.Resource != configMapResource {
@ -86,9 +86,9 @@ func mutateConfigmaps(ar v1beta1.AdmissionReview) *v1beta1.AdmissionResponse {
deserializer := codecs.UniversalDeserializer()
if _, _, err := deserializer.Decode(raw, nil, &configmap); err != nil {
klog.Error(err)
return toAdmissionResponse(err)
return toV1AdmissionResponse(err)
}
reviewResponse := v1beta1.AdmissionResponse{}
reviewResponse := v1.AdmissionResponse{}
reviewResponse.Allowed = true
if configmap.Data["mutation-start"] == "yes" {
reviewResponse.Patch = []byte(configMapPatch1)
@ -97,7 +97,7 @@ func mutateConfigmaps(ar v1beta1.AdmissionReview) *v1beta1.AdmissionResponse {
reviewResponse.Patch = []byte(configMapPatch2)
}
pt := v1beta1.PatchTypeJSONPatch
pt := v1.PatchTypeJSONPatch
reviewResponse.PatchType = &pt
return &reviewResponse

103
test/images/agnhost/webhook/convert.go Normal file
View File

@ -0,0 +1,103 @@
/*
Copyright 2019 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 webhook
import (
v1 "k8s.io/api/admission/v1"
"k8s.io/api/admission/v1beta1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
)
func convertAdmissionRequestToV1(r *v1beta1.AdmissionRequest) *v1.AdmissionRequest {
return &v1.AdmissionRequest{
Kind: r.Kind,
Namespace: r.Namespace,
Name: r.Name,
Object: r.Object,
Resource: r.Resource,
Operation: v1.Operation(r.Operation),
UID: r.UID,
DryRun: r.DryRun,
OldObject: r.OldObject,
Options: r.Options,
RequestKind: r.RequestKind,
RequestResource: r.RequestResource,
RequestSubResource: r.RequestSubResource,
SubResource: r.SubResource,
UserInfo: r.UserInfo,
}
}
func convertAdmissionRequestToV1beta1(r *v1.AdmissionRequest) *v1beta1.AdmissionRequest {
return &v1beta1.AdmissionRequest{
Kind: r.Kind,
Namespace: r.Namespace,
Name: r.Name,
Object: r.Object,
Resource: r.Resource,
Operation: v1beta1.Operation(r.Operation),
UID: r.UID,
DryRun: r.DryRun,
OldObject: r.OldObject,
Options: r.Options,
RequestKind: r.RequestKind,
RequestResource: r.RequestResource,
RequestSubResource: r.RequestSubResource,
SubResource: r.SubResource,
UserInfo: r.UserInfo,
}
}
func convertAdmissionResponseToV1(r *v1beta1.AdmissionResponse) *v1.AdmissionResponse {
var pt *v1.PatchType
if r.PatchType != nil {
t := v1.PatchType(*r.PatchType)
pt = &t
}
return &v1.AdmissionResponse{
UID: r.UID,
Allowed: r.Allowed,
AuditAnnotations: r.AuditAnnotations,
Patch: r.Patch,
PatchType: pt,
Result: r.Result,
}
}
func convertAdmissionResponseToV1beta1(r *v1.AdmissionResponse) *v1beta1.AdmissionResponse {
var pt *v1beta1.PatchType
if r.PatchType != nil {
t := v1beta1.PatchType(*r.PatchType)
pt = &t
}
return &v1beta1.AdmissionResponse{
UID: r.UID,
Allowed: r.Allowed,
AuditAnnotations: r.AuditAnnotations,
Patch: r.Patch,
PatchType: pt,
Result: r.Result,
}
}
func toV1AdmissionResponse(err error) *v1.AdmissionResponse {
return &v1.AdmissionResponse{
Result: &metav1.Status{
Message: err.Error(),
},
}
}

64
test/images/agnhost/webhook/convert_test.go Normal file
View File

@ -0,0 +1,64 @@
/*
Copyright 2019 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 webhook
import (
"fmt"
"math/rand"
"reflect"
"testing"
fuzz "github.com/google/gofuzz"
v1 "k8s.io/api/admission/v1"
"k8s.io/api/admission/v1beta1"
"k8s.io/apimachinery/pkg/api/apitesting/fuzzer"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/runtime/serializer"
"k8s.io/apimachinery/pkg/util/diff"
admissionfuzzer "k8s.io/kubernetes/pkg/apis/admission/fuzzer"
)
func TestConvertAdmissionRequestToV1(t *testing.T) {
f := fuzzer.FuzzerFor(admissionfuzzer.Funcs, rand.NewSource(rand.Int63()), serializer.NewCodecFactory(runtime.NewScheme()))
for i := 0; i < 100; i++ {
t.Run(fmt.Sprintf("Run %d/100", i), func(t *testing.T) {
orig := &v1beta1.AdmissionRequest{}
f.Fuzz(orig)
converted := convertAdmissionRequestToV1(orig)
rt := convertAdmissionRequestToV1beta1(converted)
if !reflect.DeepEqual(orig, rt) {
t.Errorf("expected all request fields to be in converted object but found unaccounted for differences, diff:\n%s", diff.ObjectReflectDiff(orig, converted))
}
})
}
}
func TestConvertAdmissionResponseToV1beta1(t *testing.T) {
f := fuzz.New()
for i := 0; i < 100; i++ {
t.Run(fmt.Sprintf("Run %d/100", i), func(t *testing.T) {
orig := &v1.AdmissionResponse{}
f.Fuzz(orig)
converted := convertAdmissionResponseToV1beta1(orig)
rt := convertAdmissionResponseToV1(converted)
if !reflect.DeepEqual(orig, rt) {
t.Errorf("expected all fields to be in converted object but found unaccounted for differences, diff:\n%s", diff.ObjectReflectDiff(orig, converted))
}
})
}
}

11
test/images/agnhost/webhook/crd.go
View File

@ -19,22 +19,21 @@ package webhook
import (
"fmt"
"k8s.io/api/admission/v1"
apiextensionsv1beta1 "k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1beta1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/api/admission/v1beta1"
"k8s.io/klog"
)
// This function expects all CRDs submitted to it to be apiextensions.k8s.io/v1beta1
// TODO: When apiextensions.k8s.io/v1 is added we will need to update this function.
func admitCRD(ar v1beta1.AdmissionReview) *v1beta1.AdmissionResponse {
func admitCRD(ar v1.AdmissionReview) *v1.AdmissionResponse {
klog.V(2).Info("admitting crd")
crdResource := metav1.GroupVersionResource{Group: "apiextensions.k8s.io", Version: "v1beta1", Resource: "customresourcedefinitions"}
if ar.Request.Resource != crdResource {
err := fmt.Errorf("expect resource to be %s", crdResource)
klog.Error(err)
return toAdmissionResponse(err)
return toV1AdmissionResponse(err)
}
raw := ar.Request.Object.Raw
@ -42,9 +41,9 @@ func admitCRD(ar v1beta1.AdmissionReview) *v1beta1.AdmissionResponse {
deserializer := codecs.UniversalDeserializer()
if _, _, err := deserializer.Decode(raw, nil, &crd); err != nil {
klog.Error(err)
return toAdmissionResponse(err)
return toV1AdmissionResponse(err)
}
reviewResponse := v1beta1.AdmissionResponse{}
reviewResponse := v1.AdmissionResponse{}
reviewResponse.Allowed = true
if v, ok := crd.Labels["webhook-e2e-test"]; ok {

23
test/images/agnhost/webhook/customresource.go
View File

@ -19,9 +19,8 @@ package webhook
import (
"encoding/json"
v1 "k8s.io/api/admission/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/api/admission/v1beta1"
"k8s.io/klog"
)
@ -34,7 +33,7 @@ const (
]`
)
func mutateCustomResource(ar v1beta1.AdmissionReview) *v1beta1.AdmissionResponse {
func mutateCustomResource(ar v1.AdmissionReview) *v1.AdmissionResponse {
klog.V(2).Info("mutating custom resource")
cr := struct {
metav1.ObjectMeta
@ -45,10 +44,10 @@ func mutateCustomResource(ar v1beta1.AdmissionReview) *v1beta1.AdmissionResponse
err := json.Unmarshal(raw, &cr)
if err != nil {
klog.Error(err)
return toAdmissionResponse(err)
return toV1AdmissionResponse(err)
}
reviewResponse := v1beta1.AdmissionResponse{}
reviewResponse := v1.AdmissionResponse{}
reviewResponse.Allowed = true
if cr.Data["mutation-start"] == "yes" {
@ -57,12 +56,12 @@ func mutateCustomResource(ar v1beta1.AdmissionReview) *v1beta1.AdmissionResponse
if cr.Data["mutation-stage-1"] == "yes" {
reviewResponse.Patch = []byte(customResourcePatch2)
}
pt := v1beta1.PatchTypeJSONPatch
pt := v1.PatchTypeJSONPatch
reviewResponse.PatchType = &pt
return &reviewResponse
}
func admitCustomResource(ar v1beta1.AdmissionReview) *v1beta1.AdmissionResponse {
func admitCustomResource(ar v1.AdmissionReview) *v1.AdmissionResponse {
klog.V(2).Info("admitting custom resource")
cr := struct {
metav1.ObjectMeta
@ -70,7 +69,7 @@ func admitCustomResource(ar v1beta1.AdmissionReview) *v1beta1.AdmissionResponse
}{}
var raw []byte
if ar.Request.Operation == v1beta1.Delete {
if ar.Request.Operation == v1.Delete {
raw = ar.Request.OldObject.Raw
} else {
raw = ar.Request.Object.Raw
@ -78,20 +77,20 @@ func admitCustomResource(ar v1beta1.AdmissionReview) *v1beta1.AdmissionResponse
err := json.Unmarshal(raw, &cr)
if err != nil {
klog.Error(err)
return toAdmissionResponse(err)
return toV1AdmissionResponse(err)
}
reviewResponse := v1beta1.AdmissionResponse{}
reviewResponse := v1.AdmissionResponse{}
reviewResponse.Allowed = true
for k, v := range cr.Data {
if k == "webhook-e2e-test" && v == "webhook-disallow" &&
(ar.Request.Operation == v1beta1.Create || ar.Request.Operation == v1beta1.Update) {
(ar.Request.Operation == v1.Create || ar.Request.Operation == v1.Update) {
reviewResponse.Allowed = false
reviewResponse.Result = &metav1.Status{
Reason: "the custom resource contains unwanted data",
}
}
if k == "webhook-e2e-test" && v == "webhook-nondeletable" && ar.Request.Operation == v1beta1.Delete {
if k == "webhook-e2e-test" && v == "webhook-nondeletable" && ar.Request.Operation == v1.Delete {
reviewResponse.Allowed = false
reviewResponse.Result = &metav1.Status{
Reason: "the custom resource cannot be deleted because it contains unwanted key and value",

127
test/images/agnhost/webhook/main.go
View File

@ -24,8 +24,9 @@ import (
"github.com/spf13/cobra"
v1 "k8s.io/api/admission/v1"
"k8s.io/api/admission/v1beta1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/klog"
// TODO: try this library to see if it generates correct json patch
// https://github.com/mattbaird/jsonpatch
@ -34,6 +35,7 @@ import (
var (
certFile string
keyFile string
port int
)
// CmdWebhook is used by agnhost Cobra.
@ -52,24 +54,40 @@ func init() {
"File containing the default x509 Certificate for HTTPS. (CA cert, if any, concatenated after server cert).")
CmdWebhook.Flags().StringVar(&keyFile, "tls-private-key-file", "",
"File containing the default x509 private key matching --tls-cert-file.")
CmdWebhook.Flags().IntVar(&port, "port", 443,
"Secure port that the webhook listens on")
}
// toAdmissionResponse is a helper function to create an AdmissionResponse
// with an embedded error
func toAdmissionResponse(err error) *v1beta1.AdmissionResponse {
return &v1beta1.AdmissionResponse{
Result: &metav1.Status{
Message: err.Error(),
},
// admitv1beta1Func handles a v1beta1 admission
type admitv1beta1Func func(v1beta1.AdmissionReview) *v1beta1.AdmissionResponse
// admitv1beta1Func handles a v1 admission
type admitv1Func func(v1.AdmissionReview) *v1.AdmissionResponse
// admitHandler is a handler, for both validators and mutators, that supports multiple admission review versions
type admitHandler struct {
v1beta1 admitv1beta1Func
v1 admitv1Func
}
func newDelegateToV1AdmitHandler(f admitv1Func) admitHandler {
return admitHandler{
v1beta1: delegateV1beta1AdmitToV1(f),
v1: f,
}
}
// admitFunc is the type we use for all of our validators and mutators
type admitFunc func(v1beta1.AdmissionReview) *v1beta1.AdmissionResponse
func delegateV1beta1AdmitToV1(f admitv1Func) admitv1beta1Func {
return func(review v1beta1.AdmissionReview) *v1beta1.AdmissionResponse {
in := v1.AdmissionReview{Request: convertAdmissionRequestToV1(review.Request)}
out := f(in)
return convertAdmissionResponseToV1beta1(out)
}
}
// serve handles the http portion of a request prior to handing to an admit
// function
func serve(w http.ResponseWriter, r *http.Request, admit admitFunc) {
func serve(w http.ResponseWriter, r *http.Request, admit admitHandler) {
var body []byte
if r.Body != nil {
if data, err := ioutil.ReadAll(r.Body); err == nil {
@ -86,77 +104,101 @@ func serve(w http.ResponseWriter, r *http.Request, admit admitFunc) {
klog.V(2).Info(fmt.Sprintf("handling request: %s", body))
// The AdmissionReview that was sent to the webhook
requestedAdmissionReview := v1beta1.AdmissionReview{}
// The AdmissionReview that will be returned
responseAdmissionReview := v1beta1.AdmissionReview{}
deserializer := codecs.UniversalDeserializer()
if _, _, err := deserializer.Decode(body, nil, &requestedAdmissionReview); err != nil {
klog.Error(err)
responseAdmissionReview.Response = toAdmissionResponse(err)
} else {
// pass to admitFunc
responseAdmissionReview.Response = admit(requestedAdmissionReview)
obj, gvk, err := deserializer.Decode(body, nil, nil)
if err != nil {
msg := fmt.Sprintf("Request could not be decoded: %v", err)
klog.Error(msg)
http.Error(w, msg, http.StatusBadRequest)
return
}
// Return the same UID
responseAdmissionReview.Response.UID = requestedAdmissionReview.Request.UID
var responseObj runtime.Object
switch *gvk {
case v1beta1.SchemeGroupVersion.WithKind("AdmissionReview"):
requestedAdmissionReview, ok := obj.(*v1beta1.AdmissionReview)
if !ok {
klog.Errorf("Expected v1beta1.AdmissionReview but got: %T", obj)
return
}
responseAdmissionReview := &v1beta1.AdmissionReview{}
responseAdmissionReview.SetGroupVersionKind(*gvk)
responseAdmissionReview.Response = admit.v1beta1(*requestedAdmissionReview)
responseAdmissionReview.Response.UID = requestedAdmissionReview.Request.UID
responseObj = responseAdmissionReview
case v1.SchemeGroupVersion.WithKind("AdmissionReview"):
requestedAdmissionReview, ok := obj.(*v1.AdmissionReview)
if !ok {
klog.Errorf("Expected v1.AdmissionReview but got: %T", obj)
return
}
responseAdmissionReview := &v1.AdmissionReview{}
responseAdmissionReview.SetGroupVersionKind(*gvk)
responseAdmissionReview.Response = admit.v1(*requestedAdmissionReview)
responseAdmissionReview.Response.UID = requestedAdmissionReview.Request.UID
responseObj = responseAdmissionReview
default:
msg := fmt.Sprintf("Unsupported group version kind: %v", gvk)
klog.Error(msg)
http.Error(w, msg, http.StatusBadRequest)
return
}
klog.V(2).Info(fmt.Sprintf("sending response: %v", responseAdmissionReview.Response))
respBytes, err := json.Marshal(responseAdmissionReview)
klog.V(2).Info(fmt.Sprintf("sending response: %v", responseObj))
respBytes, err := json.Marshal(responseObj)
if err != nil {
klog.Error(err)
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
w.Header().Set("Content-Type", "application/json")
if _, err := w.Write(respBytes); err != nil {
klog.Error(err)
}
}
func serveAlwaysAllowDelayFiveSeconds(w http.ResponseWriter, r *http.Request) {
serve(w, r, alwaysAllowDelayFiveSeconds)
serve(w, r, newDelegateToV1AdmitHandler(alwaysAllowDelayFiveSeconds))
}
func serveAlwaysDeny(w http.ResponseWriter, r *http.Request) {
serve(w, r, alwaysDeny)
serve(w, r, newDelegateToV1AdmitHandler(alwaysDeny))
}
func serveAddLabel(w http.ResponseWriter, r *http.Request) {
serve(w, r, addLabel)
serve(w, r, newDelegateToV1AdmitHandler(addLabel))
}
func servePods(w http.ResponseWriter, r *http.Request) {
serve(w, r, admitPods)
serve(w, r, newDelegateToV1AdmitHandler(admitPods))
}
func serveAttachingPods(w http.ResponseWriter, r *http.Request) {
serve(w, r, denySpecificAttachment)
serve(w, r, newDelegateToV1AdmitHandler(denySpecificAttachment))
}
func serveMutatePods(w http.ResponseWriter, r *http.Request) {
serve(w, r, mutatePods)
serve(w, r, newDelegateToV1AdmitHandler(mutatePods))
}
func serveConfigmaps(w http.ResponseWriter, r *http.Request) {
serve(w, r, admitConfigMaps)
serve(w, r, newDelegateToV1AdmitHandler(admitConfigMaps))
}
func serveMutateConfigmaps(w http.ResponseWriter, r *http.Request) {
serve(w, r, mutateConfigmaps)
serve(w, r, newDelegateToV1AdmitHandler(mutateConfigmaps))
}
func serveCustomResource(w http.ResponseWriter, r *http.Request) {
serve(w, r, admitCustomResource)
serve(w, r, newDelegateToV1AdmitHandler(admitCustomResource))
}
func serveMutateCustomResource(w http.ResponseWriter, r *http.Request) {
serve(w, r, mutateCustomResource)
serve(w, r, newDelegateToV1AdmitHandler(mutateCustomResource))
}
func serveCRD(w http.ResponseWriter, r *http.Request) {
serve(w, r, admitCRD)
serve(w, r, newDelegateToV1AdmitHandler(admitCRD))
}
func main(cmd *cobra.Command, args []string) {
@ -177,8 +219,11 @@ func main(cmd *cobra.Command, args []string) {
http.HandleFunc("/mutating-custom-resource", serveMutateCustomResource)
http.HandleFunc("/crd", serveCRD)
server := &http.Server{
Addr: ":443",
Addr: fmt.Sprintf(":%d", port),
TLSConfig: configTLS(config),
}
server.ListenAndServeTLS("", "")
err := server.ListenAndServeTLS("", "")
if err != nil {
panic(err)
}
}

33
test/images/agnhost/webhook/pods.go
View File

@ -20,10 +20,9 @@ import (
"fmt"
"strings"
"k8s.io/api/admission/v1"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/api/admission/v1beta1"
"k8s.io/klog"
)
@ -34,13 +33,13 @@ const (
)
// only allow pods to pull images from specific registry.
func admitPods(ar v1beta1.AdmissionReview) *v1beta1.AdmissionResponse {
func admitPods(ar v1.AdmissionReview) *v1.AdmissionResponse {
klog.V(2).Info("admitting pods")
podResource := metav1.GroupVersionResource{Group: "", Version: "v1", Resource: "pods"}
if ar.Request.Resource != podResource {
err := fmt.Errorf("expect resource to be %s", podResource)
klog.Error(err)
return toAdmissionResponse(err)
return toV1AdmissionResponse(err)
}
raw := ar.Request.Object.Raw
@ -48,9 +47,9 @@ func admitPods(ar v1beta1.AdmissionReview) *v1beta1.AdmissionResponse {
deserializer := codecs.UniversalDeserializer()
if _, _, err := deserializer.Decode(raw, nil, &pod); err != nil {
klog.Error(err)
return toAdmissionResponse(err)
return toV1AdmissionResponse(err)
}
reviewResponse := v1beta1.AdmissionResponse{}
reviewResponse := v1.AdmissionResponse{}
reviewResponse.Allowed = true
var msg string
@ -77,7 +76,7 @@ func admitPods(ar v1beta1.AdmissionReview) *v1beta1.AdmissionResponse {
return &reviewResponse
}
func mutatePods(ar v1beta1.AdmissionReview) *v1beta1.AdmissionResponse {
func mutatePods(ar v1.AdmissionReview) *v1.AdmissionResponse {
klog.V(2).Info("mutating pods")
podResource := metav1.GroupVersionResource{Group: "", Version: "v1", Resource: "pods"}
if ar.Request.Resource != podResource {
@ -90,13 +89,13 @@ func mutatePods(ar v1beta1.AdmissionReview) *v1beta1.AdmissionResponse {
deserializer := codecs.UniversalDeserializer()
if _, _, err := deserializer.Decode(raw, nil, &pod); err != nil {
klog.Error(err)
return toAdmissionResponse(err)
return toV1AdmissionResponse(err)
}
reviewResponse := v1beta1.AdmissionResponse{}
reviewResponse := v1.AdmissionResponse{}
reviewResponse.Allowed = true
if pod.Name == "webhook-to-be-mutated" {
reviewResponse.Patch = []byte(podsInitContainerPatch)
pt := v1beta1.PatchTypeJSONPatch
pt := v1.PatchTypeJSONPatch
reviewResponse.PatchType = &pt
}
return &reviewResponse
@ -104,21 +103,21 @@ func mutatePods(ar v1beta1.AdmissionReview) *v1beta1.AdmissionResponse {
// denySpecificAttachment denies `kubectl attach to-be-attached-pod -i -c=container1"
// or equivalent client requests.
func denySpecificAttachment(ar v1beta1.AdmissionReview) *v1beta1.AdmissionResponse {
func denySpecificAttachment(ar v1.AdmissionReview) *v1.AdmissionResponse {
klog.V(2).Info("handling attaching pods")
if ar.Request.Name != "to-be-attached-pod" {
return &v1beta1.AdmissionResponse{Allowed: true}
return &v1.AdmissionResponse{Allowed: true}
}
podResource := metav1.GroupVersionResource{Group: "", Version: "v1", Resource: "pods"}
if e, a := podResource, ar.Request.Resource; e != a {
err := fmt.Errorf("expect resource to be %s, got %s", e, a)
klog.Error(err)
return toAdmissionResponse(err)
return toV1AdmissionResponse(err)
}
if e, a := "attach", ar.Request.SubResource; e != a {
err := fmt.Errorf("expect subresource to be %s, got %s", e, a)
klog.Error(err)
return toAdmissionResponse(err)
return toV1AdmissionResponse(err)
}
raw := ar.Request.Object.Raw
@ -126,13 +125,13 @@ func denySpecificAttachment(ar v1beta1.AdmissionReview) *v1beta1.AdmissionRespon
deserializer := codecs.UniversalDeserializer()
if _, _, err := deserializer.Decode(raw, nil, &podAttachOptions); err != nil {
klog.Error(err)
return toAdmissionResponse(err)
return toV1AdmissionResponse(err)
}
klog.V(2).Info(fmt.Sprintf("podAttachOptions=%#v\n", podAttachOptions))
if !podAttachOptions.Stdin || podAttachOptions.Container != "container1" {
return &v1beta1.AdmissionResponse{Allowed: true}
return &v1.AdmissionResponse{Allowed: true}
}
return &v1beta1.AdmissionResponse{
return &v1.AdmissionResponse{
Allowed: false,
Result: &metav1.Status{
Message: "attaching to pod 'to-be-attached-pod' is not allowed",

4
test/images/agnhost/webhook/scheme.go
View File

@ -17,7 +17,9 @@ limitations under the License.
package webhook
import (
admissionv1 "k8s.io/api/admission/v1"
admissionv1beta1 "k8s.io/api/admission/v1beta1"
admissionregistrationv1 "k8s.io/api/admissionregistration/v1"
admissionregistrationv1beta1 "k8s.io/api/admissionregistration/v1beta1"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/runtime"
@ -36,4 +38,6 @@ func addToScheme(scheme *runtime.Scheme) {
utilruntime.Must(corev1.AddToScheme(scheme))
utilruntime.Must(admissionv1beta1.AddToScheme(scheme))
utilruntime.Must(admissionregistrationv1beta1.AddToScheme(scheme))
utilruntime.Must(admissionv1.AddToScheme(scheme))
utilruntime.Must(admissionregistrationv1.AddToScheme(scheme))
}