From 6e86182e19b168fe7375ab0f07db09c6a780d36a Mon Sep 17 00:00:00 2001
From: Soam Vasani <soamvasani@platform9.com>
Date: Tue, 1 Nov 2016 18:14:23 -0700
Subject: [PATCH] Poolmgr API tweaks + convenient Start function

---
 poolmgr/api.go     | 11 ++++----
 poolmgr/poolmgr.go | 65 ++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 70 insertions(+), 6 deletions(-)
 create mode 100644 poolmgr/poolmgr.go

diff --git a/poolmgr/api.go b/poolmgr/api.go
index d457650d..7928168f 100644
--- a/poolmgr/api.go
+++ b/poolmgr/api.go
@@ -58,7 +58,7 @@ func MakeAPI(gpm *GenericPoolManager, controller *controllerclient.Client) *API
 	}
 }
 
-func (api *API) lookupApi(w http.ResponseWriter, r *http.Request) {
+func (api *API) getServiceForFunctionApi(w http.ResponseWriter, r *http.Request) {
 	body, err := ioutil.ReadAll(r.Body)
 	if err != nil {
 		http.Error(w, "Failed to read request", 500)
@@ -73,15 +73,14 @@ func (api *API) lookupApi(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	serviceUrl, err := api.lookup(&m)
+	serviceName, err := api.getServiceForFunction(&m)
 	if err != nil {
 		code, msg := fission.GetHTTPError(err)
 		log.Printf("Error: %v: %v", code, msg)
 		http.Error(w, msg, code)
 	}
 
-	// return serviceUrl
-	w.Write([]byte(serviceUrl))
+	w.Write([]byte(serviceName))
 }
 
 func (api *API) getFunctionEnv(m *fission.Metadata) (*fission.Environment, error) {
@@ -112,7 +111,7 @@ func (api *API) getFunctionEnv(m *fission.Metadata) (*fission.Environment, error
 	return env, nil
 }
 
-func (api *API) lookup(m *fission.Metadata) (string, error) {
+func (api *API) getServiceForFunction(m *fission.Metadata) (string, error) {
 	// Check function -> svc map
 	result, err := api.functionService.Get(m)
 	if err == nil {
@@ -153,7 +152,7 @@ func (api *API) lookup(m *fission.Metadata) (string, error) {
 
 func (api *API) Serve(port int) {
 	r := mux.NewRouter()
-	r.HandleFunc("/v1/lookup", api.lookupApi).Methods("GET")
+	r.HandleFunc("/v1/getServiceForFunction", api.getServiceForFunctionApi).Methods("POST")
 
 	address := fmt.Sprintf(":%v", port)
 	log.Printf("starting poolmgr at port %v", port)
diff --git a/poolmgr/poolmgr.go b/poolmgr/poolmgr.go
new file mode 100644
index 00000000..6ac3ba4b
--- /dev/null
+++ b/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
+}