4ac20ffc2b
add service mesh metrics remove unused circle yaml fix travis misconfiguration fix travis misconfiguration fix travis misconfiguration
116 lines
3.6 KiB
Go
116 lines
3.6 KiB
Go
/*
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Copyright 2018 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package webhook
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import (
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"context"
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admissionregistration "k8s.io/api/admissionregistration/v1beta1"
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corev1 "k8s.io/api/core/v1"
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apierrors "k8s.io/apimachinery/pkg/api/errors"
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"k8s.io/apimachinery/pkg/runtime"
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"sigs.k8s.io/controller-runtime/pkg/client"
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)
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type mutateFn func(current, desired *runtime.Object) error
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var serviceFn = func(current, desired *runtime.Object) error {
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typedC := (*current).(*corev1.Service)
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typedD := (*desired).(*corev1.Service)
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typedC.Spec.Selector = typedD.Spec.Selector
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return nil
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}
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var mutatingWebhookConfigFn = func(current, desired *runtime.Object) error {
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typedC := (*current).(*admissionregistration.MutatingWebhookConfiguration)
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typedD := (*desired).(*admissionregistration.MutatingWebhookConfiguration)
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typedC.Webhooks = typedD.Webhooks
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return nil
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}
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var validatingWebhookConfigFn = func(current, desired *runtime.Object) error {
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typedC := (*current).(*admissionregistration.ValidatingWebhookConfiguration)
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typedD := (*desired).(*admissionregistration.ValidatingWebhookConfiguration)
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typedC.Webhooks = typedD.Webhooks
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return nil
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}
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var genericFn = func(current, desired *runtime.Object) error {
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*current = *desired
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return nil
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}
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// createOrReplaceHelper creates the object if it doesn't exist;
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// otherwise, it will replace it.
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// When replacing, fn should know how to preserve existing fields in the object GET from the APIServer.
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// TODO: use the helper in #98 when it merges.
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func createOrReplaceHelper(c client.Client, obj runtime.Object, fn mutateFn) error {
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if obj == nil {
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return nil
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}
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err := c.Create(context.Background(), obj)
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if apierrors.IsAlreadyExists(err) {
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// TODO: retry mutiple times with backoff if necessary.
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existing := obj.DeepCopyObject()
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objectKey, err := client.ObjectKeyFromObject(obj)
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if err != nil {
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return err
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}
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err = c.Get(context.Background(), objectKey, existing)
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if err != nil {
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return err
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}
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err = fn(&existing, &obj)
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if err != nil {
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return err
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}
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return c.Update(context.Background(), existing)
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}
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return err
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}
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// createOrReplace creates the object if it doesn't exist;
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// otherwise, it will replace it.
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// When replacing, it knows how to preserve existing fields in the object GET from the APIServer.
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// It currently only support MutatingWebhookConfiguration, ValidatingWebhookConfiguration and Service.
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// For other kinds, it uses genericFn to replace the whole object.
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func createOrReplace(c client.Client, obj runtime.Object) error {
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if obj == nil {
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return nil
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}
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switch obj.(type) {
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case *admissionregistration.MutatingWebhookConfiguration:
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return createOrReplaceHelper(c, obj, mutatingWebhookConfigFn)
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case *admissionregistration.ValidatingWebhookConfiguration:
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return createOrReplaceHelper(c, obj, validatingWebhookConfigFn)
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case *corev1.Service:
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return createOrReplaceHelper(c, obj, serviceFn)
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default:
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return createOrReplaceHelper(c, obj, genericFn)
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}
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}
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func batchCreateOrReplace(c client.Client, objs ...runtime.Object) error {
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for i := range objs {
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err := createOrReplace(c, objs[i])
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if err != nil {
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return err
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}
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}
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return nil
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}
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