Django on Twisted with Prometheus

__main__.py

"""
Support for running `python -m myapp`.
"""

from myapp.wsgi import main

if __name__ == "__main__":
    main()

wsgi.py

import os

from django.conf import settings
from django.core.wsgi import get_wsgi_application

os.environ.setdefault("DJANGO_SETTINGS_MODULE", "myapp.settings")

# This application object is used by any WSGI server configured to use this
# file. This includes Django's development server, if the WSGI_APPLICATION
# setting points here.
application = get_wsgi_application()

def main():
    import sys
    from twisted import logger
    from twisted.internet import reactor
    from twisted.internet.endpoints import TCP4ServerEndpoint
    from twisted.python import threadpool
    from twisted.web.http import proxiedLogFormatter
    from twisted.web.server import Site
    from twisted.web.wsgi import WSGIResource
    from prometheus_client.twisted import MetricsResource

    observers = [logger.textFileLogObserver(sys.stdout)]
    logger.globalLogBeginner.beginLoggingTo(observers)
    logger.Logger().info('myapp starting on :8000')

    pool = threadpool.ThreadPool()
    reactor.callWhenRunning(pool.start)
    django_resource = WSGIResource(reactor, pool, application)
    django_site = Site(django_resource, logFormatter=proxiedLogFormatter)
    django_endpoint = TCP4ServerEndpoint(reactor, 8000)
    django_endpoint.listen(django_site)
    metrics_resource = MetricsResource()
    metrics_site = Site(metrics_resource)
    metrics_endpoint = TCP4ServerEndpoint(reactor, 9000)
    metrics_endpoint.listen(metrics_site)
    reactor.run()
    pool.stop()


if __name__ == '__main__':
    main()