无法在heroku上部署节点应用程序。 仅显示欢迎消息

Question

heroku日志

 2018-04-20T20:45:50.151330+00:00 app[api]: Enable Logplex by user ghsklat2378123@gmail.com
 2018-04-20T20:45:50.059558+00:00 app[api]: Release v1 created by user ghsklat2378123@gmail.com
 2018-04-20T20:45:50.059558+00:00 app[api]: Initial release by user ghsklat2378123@gmail.com
 2018-04-20T20:45:50.151330+00:00 app[api]: Release v2 created by user ghsklat2378123@gmail.com
 2018-04-20T20:46:48.000000+00:00 app[api]: Build started by user ghsklat2378123@gmail.com
 2018-04-20T20:46:58.098188+00:00 app[api]: Deploy 2b289e67 by user ghsklat2378123@gmail.com
 2018-04-20T20:46:58.098188+00:00 app[api]: Release v3 created by user ghsklat2378123@gmail.com
 2018-04-20T20:46:48.000000+00:00 app[api]: Build succeeded
 2018-04-20T20:46:58.115335+00:00 app[api]: Scaled to web@1:Free by user ghsklat2378123@gmail.com
 2018-04-20T20:47:00.895268+00:00 heroku[web.1]: Starting process with command `npm start`
 2018-04-20T20:47:03.518908+00:00 app[web.1]: 
 2018-04-20T20:47:03.518933+00:00 app[web.1]: > node server.js
 2018-04-20T20:47:03.518931+00:00 app[web.1]: > stywqrrd@1.0.0 start /app
 2018-04-20T20:47:03.518935+00:00 app[web.1]: 
 2018-04-20T20:47:03.875652+00:00 app[web.1]: Express server listening on port 3000
 2018-04-20T20:48:01.013365+00:00 heroku[web.1]: Error R10 (Boot timeout) -> Web process failed to bind to $PORT within 60 seconds of launch
 2018-04-20T20:48:01.013866+00:00 heroku[web.1]: Stopping process with SIGKILL
 2018-04-20T20:48:01.152301+00:00 heroku[web.1]: State changed from starting to crashed
 2018-04-20T20:48:01.155261+00:00 heroku[web.1]: State changed from crashed to starting
 2018-04-20T20:48:01.132422+00:00 heroku[web.1]: Process exited with status 137
 2018-04-20T20:48:02.894892+00:00 heroku[web.1]: Starting process with command `npm start`
 2018-04-20T20:48:05.106690+00:00 app[web.1]: 
 2018-04-20T20:48:05.106708+00:00 app[web.1]: > sstywqrrd@1.0.0 start /app
 2018-04-20T20:48:05.106710+00:00 app[web.1]: > node server.js
 2018-04-20T20:48:05.106712+00:00 app[web.1]: 
 2018-04-20T20:48:05.295340+00:00 app[web.1]: Express server listening on port 3000

这是我无法部署的非常简单的节点应用程序。 当我获得链接时，它将显示： heroku welcome to you new app. Refer to documentation if you need help deploying heroku welcome to you new app. Refer to documentation if you need help deploying 。 日志不显示任何错误（所有日志均显示为蓝色）。 我该如何解决？

克隆仓库，然后执行git init，git add，git commit

heroku create
heroku git:remote -a safe-forest-59278
heroku apps:create myappName
git push heroku master

Answer 1

根据对帐单

Error R10 (Boot timeout) -> Web process failed to bind to $PORT
within 60 seconds of launch

这仅表示您尝试连接的端口由于某种原因不可用。

而且最有可能您正在指定端口，例如

port = 3000

您应该将此行更改为

port = process.env.PORT || 3000

这将让heroku服务器为您的服务器分配一个可用端口以进行监听。

发生这种情况的原因是，大多数情况下是因为您在开发应用程序时指定了端口，所以这些端口很少有机会在生产中可用并打开。