134 lines
4.3 KiB
Go
134 lines
4.3 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 registry
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import (
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"fmt"
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"time"
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"code.google.com/p/go-uuid/uuid"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/apiserver"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/labels"
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)
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// ControllerRegistryStorage is an implementation of RESTStorage for the api server.
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type ControllerRegistryStorage struct {
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registry ControllerRegistry
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podRegistry PodRegistry
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// Period in between polls when waiting for a controller to complete
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pollPeriod time.Duration
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}
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func NewControllerRegistryStorage(registry ControllerRegistry, podRegistry PodRegistry) apiserver.RESTStorage {
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return &ControllerRegistryStorage{
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registry: registry,
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podRegistry: podRegistry,
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pollPeriod: time.Second * 10,
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}
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}
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// List obtains a list of ReplicationControllers that match selector.
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func (storage *ControllerRegistryStorage) List(selector labels.Selector) (interface{}, error) {
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result := api.ReplicationControllerList{}
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controllers, err := storage.registry.ListControllers()
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if err == nil {
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for _, controller := range controllers {
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if selector.Matches(labels.Set(controller.Labels)) {
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result.Items = append(result.Items, controller)
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}
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}
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}
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return result, err
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}
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// Get obtains the ReplicationController specified by its id.
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func (storage *ControllerRegistryStorage) Get(id string) (interface{}, error) {
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controller, err := storage.registry.GetController(id)
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if err != nil {
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return nil, err
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}
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return controller, err
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}
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// Delete asynchronously deletes the ReplicationController specified by its id.
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func (storage *ControllerRegistryStorage) Delete(id string) (<-chan interface{}, error) {
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return apiserver.MakeAsync(func() (interface{}, error) {
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return api.Status{Status: api.StatusSuccess}, storage.registry.DeleteController(id)
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}), nil
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}
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// Extract deserializes user provided data into an api.ReplicationController.
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func (storage *ControllerRegistryStorage) Extract(body []byte) (interface{}, error) {
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result := api.ReplicationController{}
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err := api.DecodeInto(body, &result)
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return result, err
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}
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// Create registers a given new ReplicationController instance to storage.registry.
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func (storage *ControllerRegistryStorage) Create(obj interface{}) (<-chan interface{}, error) {
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controller, ok := obj.(api.ReplicationController)
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if !ok {
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return nil, fmt.Errorf("not a replication controller: %#v", obj)
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}
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if len(controller.ID) == 0 {
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controller.ID = uuid.NewUUID().String()
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}
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// Pod Manifest ID should be assigned by the pod API
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controller.DesiredState.PodTemplate.DesiredState.Manifest.ID = ""
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return apiserver.MakeAsync(func() (interface{}, error) {
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err := storage.registry.CreateController(controller)
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if err != nil {
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return nil, err
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}
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return storage.waitForController(controller)
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}), nil
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}
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// Update replaces a given ReplicationController instance with an existing instance in storage.registry.
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func (storage *ControllerRegistryStorage) Update(obj interface{}) (<-chan interface{}, error) {
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controller, ok := obj.(api.ReplicationController)
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if !ok {
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return nil, fmt.Errorf("not a replication controller: %#v", obj)
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}
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if len(controller.ID) == 0 {
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return nil, fmt.Errorf("ID should not be empty: %#v", controller)
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}
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return apiserver.MakeAsync(func() (interface{}, error) {
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err := storage.registry.UpdateController(controller)
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if err != nil {
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return nil, err
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}
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return storage.waitForController(controller)
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}), nil
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}
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func (storage *ControllerRegistryStorage) waitForController(ctrl api.ReplicationController) (interface{}, error) {
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for {
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pods, err := storage.podRegistry.ListPods(labels.Set(ctrl.DesiredState.ReplicaSelector).AsSelector())
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if err != nil {
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return ctrl, err
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}
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if len(pods) == ctrl.DesiredState.Replicas {
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break
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}
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time.Sleep(storage.pollPeriod)
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}
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return ctrl, nil
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}
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