CODEWITHSUNDEEP
pythongoogle-app-engine
morfys
morfys

Reputation: 2425

How to dynamically change logging level of python app in Google App Engine?

If I have a python app running in Google App Engine, how can I dynamically change the app's logging level during runtime? The app's logging level is currently done via a logging config file.

One brute force way is to update the logging config file locally, and run 'appcfg.py -R update path_to_product'. But this will update all modified files.

Is there a better way to do this?

I looked at dictConfig and fileConfig. But using these methods would not update the logging configuration of running processes (especially those running on different app engine instances).

Upvotes: 2

Views: 4140

Answers (1)

ChrisC73
ChrisC73

Reputation: 1863

You can create a handler method and call it to dynamically set the log level at runtime.

eg:

    def logLevel(self, request):
        # ?value= NOTSET, DEBUG, INFO, WARN, ERROR, FATAL, CRITICAL
        value = request.value.upper() if request.value else None
        logging.info("Setting log level to: {}".format(value))
        logging.getLogger().setLevel(value)
        logging.debug("Test debug")
        logging.info("Test info")
        logging.warn("Test warn")
        logging.error("Test error")
        logging.critical("Test critical")

Specific loggers may also be targeted eg:

logging.getLogger('suds').setLevel(value)

(Note that in the GAE launcher 'debug' logs are not shown by default.)

Upvotes: 2

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