Flask + mod_wsgi automatic reload on source code change

Question

Does anyone know how to make a mod_wsgi automatically reload a Flask app when any of the modules changes? I\'ve tried WSGIScriptReloading On, but n

Answer 1

I think it's a very realistic situation to want to reload source code automatically in production. Think of an environment where sources are deployed per version and a 'production' symlink points to one of those versions. Whenever you want release a newer version, you just point the symlink to another path. But apache and mod_wsgi still collect the files from the symlinked directory and therefor need to have a reloading mechanism in place based on timestamps, size or w/e. Sure, one application might not be a problem, but what about hosting 15-20 applications that are all undergoing active development? Not automatically reloading sources is a pure loss in such a situation compared to restarting apache every single time.

Back to the question: if the framework you're using (in this case flask) does not have a plugin or tool in place for automatic source code reloading, then the two options described by Graham and Malphas are your best options. Either trigger the wsgi process to restart or implement a monitoring system.