Don't start application until all components were initialized

server.ts

@@ -58,7 +58,11 @@ import { initDatabaseModels } from './server/initializers/database'
 import { migrate } from './server/initializers/migrator'
 migrate()
   .then(() => initDatabaseModels(false))
-  .then(() => onDatabaseInitDone())
+  .then(() => startApplication())
+  .catch(err => {
+    logger.error('Cannot start application.', { err })
+    process.exit(-1)
+  })
 
 // ----------- PeerTube modules -----------
 import { installApplication } from './server/initializers'
@@ -179,17 +183,16 @@ app.use(function (err, req, res, next) {
 
 // ----------- Run -----------
 
-function onDatabaseInitDone () {
+async function startApplication () {
   const port = CONFIG.LISTEN.PORT
 
-  installApplication()
-    .then(() => {
-      // ----------- Make the server listening -----------
-      server.listen(port, () => {
-        // Emailer initialization and then job queue initialization
+  await installApplication()
+
+  // Email initialization
   Emailer.Instance.init()
-        Emailer.Instance.checkConnectionOrDie()
-          .then(() => JobQueue.Instance.init())
+  await Emailer.Instance.checkConnectionOrDie()
+
+  await JobQueue.Instance.init()
 
   // Caches initializations
   VideosPreviewCache.Instance.init(CONFIG.CACHE.PREVIEWS.SIZE)
@@ -201,8 +204,8 @@ function onDatabaseInitDone () {
   // Redis initialization
   Redis.Instance.init()
 
+  // Make server listening
+  server.listen(port)
   logger.info('Server listening on port %d', port)
   logger.info('Web server: %s', CONFIG.WEBSERVER.URL)
-      })
-    })
 }

server/lib/emailer.ts

@@ -60,6 +60,8 @@ class Emailer {
   async checkConnectionOrDie () {
     if (!this.transporter) return
 
+    logger.info('Testing SMTP server...')
+
     try {
       const success = await this.transporter.verify()
       if (success !== true) this.dieOnConnectionFailure()