Refactor Kubelet config sources for clarity

Create a new "Pod" concept which can identify pods from
many config sources.

pkg/kubelet/types.go

@@ -0,0 +1,60 @@
+/*
+Copyright 2014 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 kubelet
+
+import (
+	"fmt"
+
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
+)
+
+// Pod represents the structure of a pod on the Kubelet, distinct from the apiserver
+// representation of a Pod.
+type Pod struct {
+	Namespace string
+	Name      string
+	Manifest  api.ContainerManifest
+}
+
+// PodOperation defines what changes will be made on a pod configuration.
+type PodOperation int
+
+const (
+	// This is the current pod configuration
+	SET PodOperation = iota
+	// Pods with the given ids are new to this source
+	ADD
+	// Pods with the given ids have been removed from this source
+	REMOVE
+	// Pods with the given ids have been updated in this source
+	UPDATE
+)
+
+// PodUpdate defines an operation sent on the channel. You can add or remove single services by
+// sending an array of size one and Op == ADD|REMOVE (with REMOVE, only the ID is required).
+// For setting the state of the system to a given state for this source configuration, set
+// Pods as desired and Op to SET, which will reset the system state to that specified in this
+// operation for this source channel. To remove all pods, set Pods to empty array and Op to SET.
+type PodUpdate struct {
+	Pods []Pod
+	Op   PodOperation
+}
+
+//GetPodFullName returns a name that full identifies a pod across all config sources.
+func GetPodFullName(pod *Pod) string {
+	return fmt.Sprintf("%s.%s", pod.Name, pod.Namespace)
+}