6b3a6e6b98
Instead of saying "Google Inc." (which is not always correct) say "The Kubernetes Authors", which is generic.
107 lines
3.2 KiB
Go
107 lines
3.2 KiB
Go
/*
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Copyright 2014 The Kubernetes Authors All rights reserved.
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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 autoprovision
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import (
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"io"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/admission"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/api/errors"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/api/latest"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/api/meta"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/client"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/client/cache"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/fields"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/labels"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/runtime"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/watch"
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)
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func init() {
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admission.RegisterPlugin("NamespaceAutoProvision", func(client client.Interface, config io.Reader) (admission.Interface, error) {
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return NewProvision(client), nil
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})
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}
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// provision is an implementation of admission.Interface.
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// It looks at all incoming requests in a namespace context, and if the namespace does not exist, it creates one.
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// It is useful in deployments that do not want to restrict creation of a namespace prior to its usage.
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type provision struct {
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client client.Interface
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store cache.Store
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}
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func (p *provision) Admit(a admission.Attributes) (err error) {
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// only handle create requests
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if a.GetOperation() != "CREATE" {
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return nil
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}
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defaultVersion, kind, err := latest.RESTMapper.VersionAndKindForResource(a.GetResource())
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if err != nil {
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return admission.NewForbidden(a, err)
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}
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mapping, err := latest.RESTMapper.RESTMapping(kind, defaultVersion)
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if err != nil {
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return admission.NewForbidden(a, err)
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}
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if mapping.Scope.Name() != meta.RESTScopeNameNamespace {
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return nil
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}
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namespace := &api.Namespace{
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ObjectMeta: api.ObjectMeta{
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Name: a.GetNamespace(),
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Namespace: "",
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},
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Status: api.NamespaceStatus{},
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}
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_, exists, err := p.store.Get(namespace)
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if err != nil {
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return admission.NewForbidden(a, err)
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}
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if exists {
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return nil
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}
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_, err = p.client.Namespaces().Create(namespace)
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if err != nil && !errors.IsAlreadyExists(err) {
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return admission.NewForbidden(a, err)
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}
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return nil
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}
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func NewProvision(c client.Interface) admission.Interface {
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store := cache.NewStore(cache.MetaNamespaceKeyFunc)
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reflector := cache.NewReflector(
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&cache.ListWatch{
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ListFunc: func() (runtime.Object, error) {
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return c.Namespaces().List(labels.Everything(), fields.Everything())
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},
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WatchFunc: func(resourceVersion string) (watch.Interface, error) {
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return c.Namespaces().Watch(labels.Everything(), fields.Everything(), resourceVersion)
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},
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},
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&api.Namespace{},
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store,
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0,
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)
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reflector.Run()
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return &provision{
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client: c,
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store: store,
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}
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}
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