Add "componentstatus" to API for easier cluster health check.

pkg/client/componentstatuses.go

@@ -0,0 +1,63 @@
+/*
+Copyright 2015 Google Inc. All rights reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package client
+
+import (
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/fields"
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/labels"
+)
+
+type ComponentStatusesInterface interface {
+	ComponentStatuses() ComponentStatusInterface
+}
+
+// ComponentStatusInterface contains methods to retrieve ComponentStatus
+type ComponentStatusInterface interface {
+	List(label labels.Selector, field fields.Selector) (*api.ComponentStatusList, error)
+	Get(name string) (*api.ComponentStatus, error)
+
+	// TODO: It'd be nice to have watch support at some point
+	//Watch(label labels.Selector, field fields.Selector, resourceVersion string) (watch.Interface, error)
+}
+
+// componentStatuses implements ComponentStatusesInterface
+type componentStatuses struct {
+	client *Client
+}
+
+func newComponentStatuses(c *Client) *componentStatuses {
+	return &componentStatuses{c}
+}
+
+func (c *componentStatuses) List(label labels.Selector, field fields.Selector) (result *api.ComponentStatusList, err error) {
+	result = &api.ComponentStatusList{}
+	err = c.client.Get().
+		Resource("componentStatuses").
+		LabelsSelectorParam(label).
+		FieldsSelectorParam(field).
+		Do().
+		Into(result)
+
+	return result, err
+}
+
+func (c *componentStatuses) Get(name string) (result *api.ComponentStatus, err error) {
+	result = &api.ComponentStatus{}
+	err = c.client.Get().Resource("componentStatuses").Name(name).Do().Into(result)
+	return
+}