App Engine won't start instances in standard environment

[Tamás Kovács]

Hi All,

I have a simple Symfony PHP app deployed to appending in standard environment, but when I look at the website I get a 500 HTTP error. On the App Engine dashboard I see that there are no instances started for that version and in the logs I see these messages:

A 2020-03-15T12:16:47.001250Z nginx: configuration file /etc/nginx/nginx.conf test failed 

A 2020-03-15T12:16:46.999878Z nginx: [emerg] open() "/run/nginx.pid" failed (30: Read-only file system) 

A 2020-03-15T12:16:46.999429Z nginx: the configuration file /etc/nginx/nginx.conf syntax is ok 

A 2020-03-15T12:16:46.931140Z nginx: [warn] the "user" directive makes sense only if the master process runs with super-user privileges, ignored in /etc/nginx/nginx.conf:20 

A 2020-03-15T12:16:46.859958Z + /usr/sbin/nginx -t -c /etc/nginx/nginx.conf 

A 2020-03-15T12:16:46.857172Z Moving user supplied config files... 

A 2020-03-15T12:16:46.834045Z + /bin/bash /build-scripts/move-config-files.sh 

I 2020-03-15T12:16:46.360772Z GET 500 0 B 1.1 s Chrome 80 / GET 500 0 B 1.1 s Chrome 80 5e6e1cae00ff058144e2808c030001707e696e766573746d656e742d63616c63756c61746f722d303100016d6173746572000100

The funny thing is that this only occurs when I deploy my app through Cloud Build (using a Github trigger). When I deploy it by hand using the gcloud app deploy command it works fine. I also managed to get it running in flex environment.

Does anyone know what is going on here? What am I doing wrong?

Thank you!

[David (Cloud Platform Support)]

Hello,

I believe this could be related to authentication issues. I came to this theory when you mentioned that If you deploy it manually, it works properly but if you do it through triggers, it does not. Please make sure that whatever authentication your application is doing is being properly handled (not looking for a key in a local path).