Poolmgr API tweaks + convenient Start function

poolmgr/poolmgr.go

@@ -0,0 +1,65 @@
+/*
+Copyright 2016 The Fission Authors.
+
+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 poolmgr
+
+import (
+	"log"
+	"strings"
+
+	"k8s.io/client-go/1.4/kubernetes"
+	"k8s.io/client-go/1.4/rest"
+
+	controllerclient "github.com/platform9/fission/controller/client"
+)
+
+// Get a kubernetes client using the pod's service account.  This only
+// works when we're running inside a kubernetes cluster.
+func getKubernetesClient() (*kubernetes.Clientset, error) {
+	// creates the in-cluster config
+	config, err := rest.InClusterConfig()
+	if err != nil {
+		log.Printf("Error getting kubernetes client config: %v", err)
+		return nil, err
+	}
+
+	// creates the clientset
+	clientset, err := kubernetes.NewForConfig(config)
+	if err != nil {
+		log.Printf("Error getting kubernetes client: %v", err)
+		return nil, err
+	}
+
+	return clientset, nil
+}
+
+func StartPoolmgr(controllerUrl string, namespace string, port int) error {
+	controllerUrl = strings.TrimSuffix(controllerUrl, "/")
+	controllerClient := controllerclient.MakeClient(controllerUrl)
+
+	kubernetesClient, err := getKubernetesClient()
+	if err != nil {
+		log.Printf("Failed to get kubernetes client: %v", err)
+		return err
+	}
+
+	gpm := MakeGenericPoolManager(controllerUrl, kubernetesClient, namespace)
+
+	api := MakeAPI(gpm, controllerClient)
+	go api.Serve(port)
+
+	return nil
+}