Archives bigger than 256K size need env variable for uploading (#697)

For archives bigger than 256K, the Storage service was called from the client side, this needed few environment variables to be set. This change uses port forwarding to achieve the same and does not need environment variables to be set.

controller/api.go

@@ -35,6 +35,15 @@ import (
 	"github.com/fission/fission/fission/logdb"
 )
 
+var podNamespace string
+
+func init() {
+	podNamespace = os.Getenv("POD_NAMESPACE")
+	if podNamespace == "" {
+		podNamespace = "fission"
+	}
+}
+
 type (
 	API struct {
 		fissionClient     *crd.FissionClient
@@ -167,6 +176,18 @@ func (api *API) HealthHandler(w http.ResponseWriter, r *http.Request) {
 	w.WriteHeader(http.StatusOK)
 }
 
+func (api *API) GetSvcName(w http.ResponseWriter, r *http.Request) {
+	appLabelSelector := "application=" + r.URL.Query().Get("application")
+	services, err := api.kubernetesClient.CoreV1().Services(podNamespace).List(metav1.ListOptions{
+		LabelSelector: appLabelSelector,
+	})
+	if err != nil || len(services.Items) > 1 || len(services.Items) == 0 {
+		api.respondWithError(w, err)
+	}
+	service := services.Items[0]
+	fmt.Fprintf(w, service.Name+"."+podNamespace)
+}
+
 func (api *API) Serve(port int) {
 	r := mux.NewRouter()
 	r.HandleFunc("/healthz", api.HealthHandler).Methods("GET")
@@ -223,6 +244,7 @@ func (api *API) Serve(port int) {
 	r.HandleFunc("/proxy/storage/v1/archive", api.StorageServiceProxy)
 	r.HandleFunc("/proxy/logs/{function}", api.FunctionPodLogs).Methods("POST")
 	r.HandleFunc("/proxy/workflows-apiserver/{path:.*}", api.WorkflowApiserverProxy)
+	r.HandleFunc("/proxy/svcname", api.GetSvcName).Queries("application", "").Methods("GET")
 
 	address := fmt.Sprintf(":%v", port)