Debugging Edxapp

/edx/var/log/supervisor/lms-stderr.log
/edx/var/log/supervisor/cms-stderr.log

Startup error messages and debug output from the running LMS django process
- If you're getting a startup error, look here 

/edx/var/log/supervisor/supervisord.log

Debug output from the supervisor task manager
- If you make changes to the supervisor task definitions, look here.

/edx/var/log/lms/edx.log
/edx/var/log/cms/edx.log

Request logs and errors from the LMS
- If you're getting a 500 error on a certain request, look here. 

/edx/var/log/nginx/error.log

Errors from nginx proxy server that front-ends both the LMS and CMS.
- Mostly access or configuration related errors. If you're getting a 4xx or 5xx error, look here

/edx/var/log/nginx/access.log

Access logs for all requests to the server.
- If you want to see apache style logs for every request your server is getting, look here. 

/edx/app/edxapp/lms.env.json
/edx/app/edxapp/cms.env.json

Most configuration parameters for the app.
- Feature flags
- backend server locations
- theme related settings

JSON

/edx/app/edxapp/lms.auth.json
/edx/app/edxapp/cms.auth.json

Authentication parameters for the app
-  API Keys
- Database passwords
-  occasional settings that are paired with authentication

JSON

/edx/app/supervisor/conf.d/lms.conf
/edx/app/supervisor/conf.d/cms.conf

Supervisor task manager configuration for apps
- Environment variables are here
-  Startup commands for the apps.

supervisor config

/edx/app/supervisor/pre_supervisor_checks.py

Migration check commands

Python