Add in redis health check

services/real-time/app.coffee

@@ -38,6 +38,16 @@ io.configure ->
 	#io.enable('browser client gzip')
 	io.set('transports', ['websocket', 'flashsocket', 'htmlfile', 'xhr-polling', 'jsonp-polling'])
 	io.set('log level', 1)
+
+app.get "/status", (req, res, next) ->
+	res.send "real-time-sharelatex is alive"
+	
+redisCheck = redis.activeHealthCheckRedis(Settings.redis.web)
+app.get "/health_check/redis", (req, res, next) ->
+	if redisCheck.isAlive()
+		res.send 200
+	else
+		res.send 500
 	
 Router = require "./app/js/Router"
 Router.configure(app, io, sessionSockets)

services/real-time/app/coffee/Router.coffee

@@ -20,9 +20,6 @@ module.exports = Router =
 		app.get "/clients", HttpController.getConnectedClients
 		app.get "/clients/:client_id", HttpController.getConnectedClient
 		
-		app.get "/status", (req, res, next) ->
-			res.send "real-time-sharelatex is alive"
-		
 		session.on 'connection', (error, client, session) ->
 			if error?
 				logger.err err: error, "error when client connected"

services/real-time/package.json

@@ -15,7 +15,7 @@
     "express-session": "^1.9.1",
     "logger-sharelatex": "git+https://github.com/sharelatex/logger-sharelatex.git#v1.0.0",
     "metrics-sharelatex": "git+https://github.com/sharelatex/metrics-sharelatex.git#v1.0.0",
-    "redis-sharelatex": "~0.0.4",
+    "redis-sharelatex": "0.0.9",
     "session.socket.io": "^0.1.6",
     "settings-sharelatex": "git+https://github.com/sharelatex/settings-sharelatex.git#v1.0.0",
     "socket.io": "0.9.16",