102 lines
3.0 KiB
Go
102 lines
3.0 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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/*
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Package admission provides implementation for admission webhook and methods to implement admission webhook handlers.
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The following snippet is an example implementation of mutating handler.
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type Mutator struct {
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client client.Client
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decoder types.Decoder
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}
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func (m *Mutator) mutatePodsFn(ctx context.Context, pod *corev1.Pod) error {
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// your logic to mutate the passed-in pod.
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}
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func (m *Mutator) Handle(ctx context.Context, req types.Request) types.Response {
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pod := &corev1.Pod{}
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err := m.decoder.Decode(req, pod)
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if err != nil {
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return admission.ErrorResponse(http.StatusBadRequest, err)
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}
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// Do deepcopy before actually mutate the object.
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copy := pod.DeepCopy()
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err = m.mutatePodsFn(ctx, copy)
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if err != nil {
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return admission.ErrorResponse(http.StatusInternalServerError, err)
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}
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return admission.PatchResponse(pod, copy)
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}
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// InjectClient is called by the Manager and provides a client.Client to the Mutator instance.
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func (m *Mutator) InjectClient(c client.Client) error {
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h.client = c
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return nil
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}
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// InjectDecoder is called by the Manager and provides a types.Decoder to the Mutator instance.
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func (m *Mutator) InjectDecoder(d types.Decoder) error {
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h.decoder = d
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return nil
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}
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The following snippet is an example implementation of validating handler.
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type Handler struct {
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client client.Client
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decoder types.Decoder
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}
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func (v *Validator) validatePodsFn(ctx context.Context, pod *corev1.Pod) (bool, string, error) {
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// your business logic
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}
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func (v *Validator) Handle(ctx context.Context, req types.Request) types.Response {
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pod := &corev1.Pod{}
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err := h.decoder.Decode(req, pod)
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if err != nil {
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return admission.ErrorResponse(http.StatusBadRequest, err)
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}
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allowed, reason, err := h.validatePodsFn(ctx, pod)
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if err != nil {
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return admission.ErrorResponse(http.StatusInternalServerError, err)
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}
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return admission.ValidationResponse(allowed, reason)
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}
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// InjectClient is called by the Manager and provides a client.Client to the Validator instance.
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func (v *Validator) InjectClient(c client.Client) error {
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h.client = c
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return nil
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}
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// InjectDecoder is called by the Manager and provides a types.Decoder to the Validator instance.
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func (v *Validator) InjectDecoder(d types.Decoder) error {
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h.decoder = d
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return nil
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}
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*/
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package admission
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import (
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logf "sigs.k8s.io/controller-runtime/pkg/runtime/log"
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)
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var log = logf.KBLog.WithName("admission")
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