Merge pull request #15 from sharelatex/ho-profiler

add google profiler

libraries/metrics/metrics.coffee

@@ -1,4 +1,3 @@
-
 prom = require('prom-client')
 Register = require('prom-client').register
 collectDefaultMetrics = prom.collectDefaultMetrics
@@ -20,6 +19,8 @@ module.exports = Metrics =
 		appname = _name
 		collectDefaultMetrics({ timeout: 5000, prefix: Metrics.buildPromKey()})
 
+		logger = require("logger-sharelatex")
+
 		logger.log("ENABLE_TRACE_AGENT set to #{process.env['ENABLE_TRACE_AGENT']}")
 		if process.env['ENABLE_TRACE_AGENT'] == "true"
 			logger.log("starting google trace agent")
@@ -34,12 +35,24 @@ module.exports = Metrics =
 			logger.log("starting google debug agent")
 			debugAgent = require('@google-cloud/debug-agent')
 			debugAgent.start({
+				allowExpressions: true,
 				serviceContext: {
-					allowExpressions: true,
 					service: appname,
 					version: process.env['BUILD_VERSION']
 				}
 			})
+
+		logger.log("ENABLE_PROFILE_AGENT set to #{process.env['ENABLE_PROFILE_AGENT']}")
+		if process.env['ENABLE_PROFILE_AGENT'] == "true"
+			logger.log("starting google profile agent")
+			profiler = require('@google-cloud/profiler')
+			profiler.start({
+				serviceContext: {
+					service: appname,
+					version: process.env['BUILD_VERSION']
+				}
+			})
+
 		Metrics.inc("process_startup")
 
 	registerDestructor: (func) ->

libraries/metrics/package.json

@@ -1,6 +1,6 @@
 {
   "name": "metrics-sharelatex",
-  "version": "2.0.11",
+  "version": "2.0.12",
   "description": "A drop-in metrics and monitoring module for node.js apps",
   "repository": {
     "type": "git",
@@ -12,6 +12,7 @@
     "prom-client": "^11.1.3",
     "underscore": "~1.6.0",
     "@google-cloud/debug-agent": "^3.0.0",
+    "@google-cloud/profiler": "^0.2.3",
     "@google-cloud/trace-agent": "^3.2.0"
   },
   "devDependencies": {