diff --git a/app.js b/app.js
index 431857b..b64f69f 100644
--- a/app.js
+++ b/app.js
@@ -141,6 +141,10 @@ function addStaticDirectory(path, dir) {
   app.use(path, express.static(dir));
 }
 
+function getPid() {
+  return process.pid;
+}
+
 function getNodeId() {
   return Number(utils.getArgv('n'));
 }
@@ -171,5 +175,6 @@ exports.useMiddleware = useMiddleware;
 exports.registerDb = registerDb;
 exports.getDbConn = getDbConn;
 exports.addStaticDirectory = addStaticDirectory;
+exports.getNodeId = getPid;
 exports.getNodeId = getNodeId;
 exports.getInstanceId = getInstanceId;