mirror of
https://github.com/optim-enterprises-bv/kubernetes.git
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123 lines
3.7 KiB
Go
123 lines
3.7 KiB
Go
/*
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Copyright 2014 Google Inc. 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 network
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import (
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"fmt"
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"strings"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/client"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/kubelet/dockertools"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/util"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/util/errors"
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"github.com/golang/glog"
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)
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const DefaultPluginName = "kubernetes.io/no-op"
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// Plugin is an interface to network plugins for the kubelet
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type NetworkPlugin interface {
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// Init initializes the plugin. This will be called exactly once
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// before any other methods are called.
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Init(host Host) error
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// Name returns the plugin's name. This will be used when searching
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// for a plugin by name, e.g.
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Name() string
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// SetUpPod is the method called after the infra container of
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// the pod has been created but before the other containers of the
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// pod are launched.
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SetUpPod(namespace string, name string, podInfraContainerID dockertools.DockerID) error
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// TearDownPod is the method called before a pod's infra container will be deleted
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TearDownPod(namespace string, name string, podInfraContainerID dockertools.DockerID) error
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}
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// Host is an interface that plugins can use to access the kubelet.
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type Host interface {
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// Get the pod structure by its name, namespace
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GetPodByName(namespace, name string) (*api.Pod, bool)
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// GetKubeClient returns a client interface
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GetKubeClient() client.Interface
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}
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// InitNetworkPlugin inits the plugin that matches networkPluginName. Plugins must have unique names.
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func InitNetworkPlugin(plugins []NetworkPlugin, networkPluginName string, host Host) (NetworkPlugin, error) {
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if networkPluginName == "" {
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// default to the no_op plugin
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plug := &noopNetworkPlugin{}
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return plug, nil
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}
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pluginMap := map[string]NetworkPlugin{}
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allErrs := []error{}
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for _, plugin := range plugins {
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name := plugin.Name()
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if !util.IsQualifiedName(name) {
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allErrs = append(allErrs, fmt.Errorf("network plugin has invalid name: %#v", plugin))
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continue
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}
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if _, found := pluginMap[name]; found {
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allErrs = append(allErrs, fmt.Errorf("network plugin %q was registered more than once", name))
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continue
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}
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pluginMap[name] = plugin
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}
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chosenPlugin := pluginMap[networkPluginName]
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if chosenPlugin != nil {
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err := chosenPlugin.Init(host)
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if err != nil {
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allErrs = append(allErrs, fmt.Errorf("Network plugin %q failed init: %v", networkPluginName, err))
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} else {
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glog.V(1).Infof("Loaded network plugin %q", networkPluginName)
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}
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} else {
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allErrs = append(allErrs, fmt.Errorf("Network plugin %q not found.", networkPluginName))
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}
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return chosenPlugin, errors.NewAggregate(allErrs)
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}
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func UnescapePluginName(in string) string {
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return strings.Replace(in, "~", "/", -1)
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}
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type noopNetworkPlugin struct {
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}
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func (plugin *noopNetworkPlugin) Init(host Host) error {
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return nil
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}
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func (plugin *noopNetworkPlugin) Name() string {
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return DefaultPluginName
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}
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func (plugin *noopNetworkPlugin) SetUpPod(namespace string, name string, id dockertools.DockerID) error {
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return nil
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}
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func (plugin *noopNetworkPlugin) TearDownPod(namespace string, name string, id dockertools.DockerID) error {
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return nil
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}
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