Feature request per pod (#1946)

This feature enables routing more than one request to a pod at the same time. This is the first draft of the work and might involve more optimizations later.

pkg/executor/executor.go

@@ -238,7 +238,7 @@ func serveMetric(logger *zap.Logger) {
 // StartExecutor Starts executor and the executor components such as Poolmgr,
 // deploymgr and potential future executor types
 func StartExecutor(logger *zap.Logger, functionNamespace string, envBuilderNamespace string, port int) error {
-	fissionClient, kubernetesClient, _, err := crd.MakeFissionClient()
+	fissionClient, kubernetesClient, _, metricsClient, err := crd.MakeFissionClient()
 	if err != nil {
 		return errors.Wrap(err, "failed to get kubernetes client")
 	}
@@ -259,7 +259,7 @@ func StartExecutor(logger *zap.Logger, functionNamespace string, envBuilderNames
 
 	gpm := poolmgr.MakeGenericPoolManager(
 		logger,
-		fissionClient, kubernetesClient,
+		fissionClient, kubernetesClient, metricsClient,
 		functionNamespace, fetcherConfig, executorInstanceID)
 
 	ndm := newdeploy.MakeNewDeploy(