feat: add crd gen

Signed-off-by: runzexia <runzexia@yunify.com>

vendor/k8s.io/apiserver/pkg/admission/plugin/webhook/mutating/dispatcher.go

@@ -0,0 +1,166 @@
+/*
+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 mutating delegates admission checks to dynamically configured
+// mutating webhooks.
+package mutating
+
+import (
+	"context"
+	"fmt"
+	"time"
+
+	jsonpatch "github.com/evanphx/json-patch"
+	"k8s.io/klog"
+
+	admissionv1beta1 "k8s.io/api/admission/v1beta1"
+	"k8s.io/api/admissionregistration/v1beta1"
+	apierrors "k8s.io/apimachinery/pkg/api/errors"
+	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
+	"k8s.io/apimachinery/pkg/runtime"
+	utilruntime "k8s.io/apimachinery/pkg/util/runtime"
+	admissionmetrics "k8s.io/apiserver/pkg/admission/metrics"
+	webhookerrors "k8s.io/apiserver/pkg/admission/plugin/webhook/errors"
+	"k8s.io/apiserver/pkg/admission/plugin/webhook/generic"
+	"k8s.io/apiserver/pkg/admission/plugin/webhook/request"
+	"k8s.io/apiserver/pkg/admission/plugin/webhook/util"
+	"k8s.io/apiserver/pkg/util/webhook"
+)
+
+type mutatingDispatcher struct {
+	cm     *webhook.ClientManager
+	plugin *Plugin
+}
+
+func newMutatingDispatcher(p *Plugin) func(cm *webhook.ClientManager) generic.Dispatcher {
+	return func(cm *webhook.ClientManager) generic.Dispatcher {
+		return &mutatingDispatcher{cm, p}
+	}
+}
+
+var _ generic.Dispatcher = &mutatingDispatcher{}
+
+func (a *mutatingDispatcher) Dispatch(ctx context.Context, attr *generic.VersionedAttributes, relevantHooks []*v1beta1.Webhook) error {
+	for _, hook := range relevantHooks {
+		t := time.Now()
+		err := a.callAttrMutatingHook(ctx, hook, attr)
+		admissionmetrics.Metrics.ObserveWebhook(time.Since(t), err != nil, attr.Attributes, "admit", hook.Name)
+		if err == nil {
+			continue
+		}
+
+		ignoreClientCallFailures := hook.FailurePolicy != nil && *hook.FailurePolicy == v1beta1.Ignore
+		if callErr, ok := err.(*webhook.ErrCallingWebhook); ok {
+			if ignoreClientCallFailures {
+				klog.Warningf("Failed calling webhook, failing open %v: %v", hook.Name, callErr)
+				utilruntime.HandleError(callErr)
+				continue
+			}
+			klog.Warningf("Failed calling webhook, failing closed %v: %v", hook.Name, err)
+		}
+		return apierrors.NewInternalError(err)
+	}
+
+	// convert attr.VersionedObject to the internal version in the underlying admission.Attributes
+	if attr.VersionedObject != nil {
+		return a.plugin.scheme.Convert(attr.VersionedObject, attr.Attributes.GetObject(), nil)
+	}
+	return nil
+}
+
+// note that callAttrMutatingHook updates attr
+func (a *mutatingDispatcher) callAttrMutatingHook(ctx context.Context, h *v1beta1.Webhook, attr *generic.VersionedAttributes) error {
+	if attr.IsDryRun() {
+		if h.SideEffects == nil {
+			return &webhook.ErrCallingWebhook{WebhookName: h.Name, Reason: fmt.Errorf("Webhook SideEffects is nil")}
+		}
+		if !(*h.SideEffects == v1beta1.SideEffectClassNone || *h.SideEffects == v1beta1.SideEffectClassNoneOnDryRun) {
+			return webhookerrors.NewDryRunUnsupportedErr(h.Name)
+		}
+	}
+
+	// Make the webhook request
+	request := request.CreateAdmissionReview(attr)
+	client, err := a.cm.HookClient(util.HookClientConfigForWebhook(h))
+	if err != nil {
+		return &webhook.ErrCallingWebhook{WebhookName: h.Name, Reason: err}
+	}
+	response := &admissionv1beta1.AdmissionReview{}
+	if err := client.Post().Context(ctx).Body(&request).Do().Into(response); err != nil {
+		return &webhook.ErrCallingWebhook{WebhookName: h.Name, Reason: err}
+	}
+
+	if response.Response == nil {
+		return &webhook.ErrCallingWebhook{WebhookName: h.Name, Reason: fmt.Errorf("Webhook response was absent")}
+	}
+
+	for k, v := range response.Response.AuditAnnotations {
+		key := h.Name + "/" + k
+		if err := attr.AddAnnotation(key, v); err != nil {
+			klog.Warningf("Failed to set admission audit annotation %s to %s for mutating webhook %s: %v", key, v, h.Name, err)
+		}
+	}
+
+	if !response.Response.Allowed {
+		return webhookerrors.ToStatusErr(h.Name, response.Response.Result)
+	}
+
+	patchJS := response.Response.Patch
+	if len(patchJS) == 0 {
+		return nil
+	}
+	patchObj, err := jsonpatch.DecodePatch(patchJS)
+	if err != nil {
+		return apierrors.NewInternalError(err)
+	}
+	if len(patchObj) == 0 {
+		return nil
+	}
+
+	// if a non-empty patch was provided, and we have no object we can apply it to (e.g. a DELETE admission operation), error
+	if attr.VersionedObject == nil {
+		return apierrors.NewInternalError(fmt.Errorf("admission webhook %q attempted to modify the object, which is not supported for this operation", h.Name))
+	}
+
+	objJS, err := runtime.Encode(a.plugin.jsonSerializer, attr.VersionedObject)
+	if err != nil {
+		return apierrors.NewInternalError(err)
+	}
+	patchedJS, err := patchObj.Apply(objJS)
+	if err != nil {
+		return apierrors.NewInternalError(err)
+	}
+
+	var newVersionedObject runtime.Object
+	if _, ok := attr.VersionedObject.(*unstructured.Unstructured); ok {
+		// Custom Resources don't have corresponding Go struct's.
+		// They are represented as Unstructured.
+		newVersionedObject = &unstructured.Unstructured{}
+	} else {
+		newVersionedObject, err = a.plugin.scheme.New(attr.GetKind())
+		if err != nil {
+			return apierrors.NewInternalError(err)
+		}
+	}
+	// TODO: if we have multiple mutating webhooks, we can remember the json
+	// instead of encoding and decoding for each one.
+	if _, _, err := a.plugin.jsonSerializer.Decode(patchedJS, nil, newVersionedObject); err != nil {
+		return apierrors.NewInternalError(err)
+	}
+	attr.VersionedObject = newVersionedObject
+	a.plugin.scheme.Default(attr.VersionedObject)
+	return nil
+}

vendor/k8s.io/apiserver/pkg/admission/plugin/webhook/mutating/doc.go

@@ -0,0 +1,19 @@
+/*
+Copyright 2017 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 mutating makes calls to mutating webhooks during the admission
+// process.
+package mutating // import "k8s.io/apiserver/pkg/admission/plugin/webhook/mutating"

vendor/k8s.io/apiserver/pkg/admission/plugin/webhook/mutating/plugin.go

@@ -0,0 +1,96 @@
+/*
+Copyright 2017 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 mutating
+
+import (
+	"fmt"
+	"io"
+
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/apimachinery/pkg/runtime/serializer/json"
+	"k8s.io/apiserver/pkg/admission"
+	"k8s.io/apiserver/pkg/admission/configuration"
+	"k8s.io/apiserver/pkg/admission/plugin/webhook/generic"
+)
+
+const (
+	// PluginName indicates the name of admission plug-in
+	PluginName = "MutatingAdmissionWebhook"
+)
+
+// Register registers a plugin
+func Register(plugins *admission.Plugins) {
+	plugins.Register(PluginName, func(configFile io.Reader) (admission.Interface, error) {
+		plugin, err := NewMutatingWebhook(configFile)
+		if err != nil {
+			return nil, err
+		}
+
+		return plugin, nil
+	})
+}
+
+// Plugin is an implementation of admission.Interface.
+type Plugin struct {
+	*generic.Webhook
+
+	scheme         *runtime.Scheme
+	jsonSerializer *json.Serializer
+}
+
+var _ admission.MutationInterface = &Plugin{}
+
+// NewMutatingWebhook returns a generic admission webhook plugin.
+func NewMutatingWebhook(configFile io.Reader) (*Plugin, error) {
+	handler := admission.NewHandler(admission.Connect, admission.Create, admission.Delete, admission.Update)
+	p := &Plugin{}
+	var err error
+	p.Webhook, err = generic.NewWebhook(handler, configFile, configuration.NewMutatingWebhookConfigurationManager, newMutatingDispatcher(p))
+	if err != nil {
+		return nil, err
+	}
+
+	return p, nil
+}
+
+// SetScheme sets a serializer(NegotiatedSerializer) which is derived from the scheme
+func (a *Plugin) SetScheme(scheme *runtime.Scheme) {
+	a.Webhook.SetScheme(scheme)
+	if scheme != nil {
+		a.scheme = scheme
+		a.jsonSerializer = json.NewSerializer(json.DefaultMetaFactory, scheme, scheme, false)
+	}
+}
+
+// ValidateInitialization implements the InitializationValidator interface.
+func (a *Plugin) ValidateInitialization() error {
+	if err := a.Webhook.ValidateInitialization(); err != nil {
+		return err
+	}
+	if a.scheme == nil {
+		return fmt.Errorf("scheme is not properly setup")
+	}
+	if a.jsonSerializer == nil {
+		return fmt.Errorf("jsonSerializer is not properly setup")
+	}
+	return nil
+}
+
+// Admit makes an admission decision based on the request attributes.
+func (a *Plugin) Admit(attr admission.Attributes) error {
+	return a.Webhook.Dispatch(attr)
+}