Nginx passenger integration mode always require Passengerfile.json file? – CentOS

I’ve followed this installation guide to setup nginx and passenger integration mode:

https://www.phusionpassenger.com/library/install/nginx/install/oss/el7/

I’m aware that “Passenger in its Nginx integration mode is to be configured via the Nginx configuration file. There is no configuration file that is specific to Passenger only” => No Passengerfile.json in root application directory.

But after configured passenger.conf and virtual host config and started nginx, the errors occurred:

2019/05/29 09:13:22 [alert] 16126#0: *3 Error opening ‘/home/deploy/my-app/current/Passengerfile.json’ for reading: Permission denied (errno=13); This error means that the Nginx worker process (PID 16126, running as UID 997) does not have permission to access this file

I’ve tried to give permissions to nginx worker process following this instruction: https://www.phusionpassenger.com/library/admin/nginx/troubleshooting/ruby/#upon-accessing-the-web-app-nginx-reports-a-permission-denied-error

But can’t solve the problem.

My passenger.conf inside /etc/nginx/conf.d

passenger.conf
# To enable the Phusion Passenger application server (www.phusionpassenger.com),
# install the following package:
#
#   yum install passenger
#
# Then uncomment these options:

passenger_root /usr/share/ruby/vendor_ruby/phusion_passenger/locations.ini;
passenger_ruby /home/deploy/.rbenv/shims/ruby;
passenger_instance_registry_dir /var/run/passenger-instreg;

My app configuration file:

server {
  listen 80;
  listen [::]:80;

  server_name myapp.com;
  root /home/deploy/my-app/current/public;

  passenger_enabled on;
  passenger_ruby /home/deploy/.rbenv/shims/ruby;
  rails_env production;

  location /cable {
    passenger_app_group_name myapp_websocket;
    passenger_force_max_concurrent_requests_per_process 0;
  }

  # Allow uploads up to 100MB in size
  client_max_body_size 100m;

  location ~ ^/(assets|packs|uploads) {
    expires max;
    gzip_static on;
  }
}

passenger-memory-stats

---------- Nginx processes -----------
PID    PPID   VMSize    Private  Name
--------------------------------------
16121  1      113.5 MB  0.6 MB   nginx: master process /usr/sbin/nginx
16125  16121  113.7 MB  0.8 MB   nginx: worker process
16126  16121  113.7 MB  0.8 MB   nginx: worker process
### Processes: 3
### Total private dirty RSS: 2.13 MB

----- Passenger processes -----
PID    VMSize    Private  Name
-------------------------------
16109  355.0 MB  2.1 MB   Passenger watchdog
16112  923.4 MB  4.0 MB   Passenger core
### Processes: 2
### Total private dirty RSS: 6.11 MB

passenger-config restart-app /home/deploy/my-app

There are no Phusion Passenger-served applications running whose paths begin with '/home/deploy/my-app'.

Thanks in advance!