50fd47258d
The metadata client uses protobuf and returns only a subset of object data (the metadata) which allows operations that act only on objects generically to work much faster. Use the metadata client in the namespace controller to reduce the amount of work the namespace controller has to do in large namespaces.
90 lines
2.5 KiB
Go
90 lines
2.5 KiB
Go
/*
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Copyright 2016 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 services
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import (
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"time"
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"k8s.io/api/core/v1"
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"k8s.io/client-go/informers"
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clientset "k8s.io/client-go/kubernetes"
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"k8s.io/client-go/metadata"
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restclient "k8s.io/client-go/rest"
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namespacecontroller "k8s.io/kubernetes/pkg/controller/namespace"
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)
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const (
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// ncName is the name of namespace controller
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ncName = "namespace-controller"
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// ncResyncPeriod is resync period of the namespace controller
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ncResyncPeriod = 5 * time.Minute
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// ncConcurrency is concurrency of the namespace controller
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ncConcurrency = 2
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)
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// NamespaceController is a server which manages namespace controller.
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type NamespaceController struct {
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host string
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stopCh chan struct{}
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}
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// NewNamespaceController creates a new namespace controller.
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func NewNamespaceController(host string) *NamespaceController {
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return &NamespaceController{host: host, stopCh: make(chan struct{})}
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}
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// Start starts the namespace controller.
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func (n *NamespaceController) Start() error {
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config := restclient.AddUserAgent(&restclient.Config{Host: n.host}, ncName)
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// the namespace cleanup controller is very chatty. It makes lots of discovery calls and then it makes lots of delete calls.
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config.QPS = 50
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config.Burst = 200
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client, err := clientset.NewForConfig(config)
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if err != nil {
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return err
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}
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metadataClient, err := metadata.NewForConfig(config)
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if err != nil {
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return err
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}
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discoverResourcesFn := client.Discovery().ServerPreferredNamespacedResources
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informerFactory := informers.NewSharedInformerFactory(client, ncResyncPeriod)
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nc := namespacecontroller.NewNamespaceController(
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client,
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metadataClient,
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discoverResourcesFn,
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informerFactory.Core().V1().Namespaces(),
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ncResyncPeriod, v1.FinalizerKubernetes,
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)
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informerFactory.Start(n.stopCh)
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go nc.Run(ncConcurrency, n.stopCh)
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return nil
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}
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// Stop stops the namespace controller.
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func (n *NamespaceController) Stop() error {
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close(n.stopCh)
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return nil
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}
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// Name returns the name of namespace controller.
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func (n *NamespaceController) Name() string {
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return ncName
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}
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