J'ai déployé mon application Flask selon les instructions de Comment servir des applications Flask avec uWSGI et Nginx sur Ubuntu 14.04. Elle peut être déployée avec succès à l'aide de l'exemple simple du didacticiel, mais cela ne fonctionne pas lors du remplacement du fichier d'entrée de l'application par mon. propre, et ce qui est étrange, c'est qu'il est utilisé directement dans l'environnement virtualenv

python wsgi.py

est possible, mais utilisez

uwsgi --socket 0.0.0.0:5000 --protocol=http -w wsgi

ne fonctionne pas, l'erreur est la suivante :

    dev@ubuntu:~/tests$ uwsgi --socket 0.0.0.0:5000 --protocol=http -w wsgi
    *** Starting uWSGI 2.0.12 (64bit) on [Sat Apr  9 16:11:05 2016] ***
    compiled with version: 4.8.2 on 08 April 2016 16:57:14
    os: Linux-3.13.0-32-generic #57-Ubuntu SMP Tue Jul 15 03:51:08 UTC 2014
    nodename: ubuntu
    machine: x86_64
    clock source: unix
    detected number of CPU cores: 4
    current working directory: /home/xiaoyi/tests
    detected binary path: /home/xiaoyi/tests/env/bin/uwsgi
    !!! no internal routing support, rebuild with pcre support !!!
    *** WARNING: you are running uWSGI without its master process manager ***
    your processes number limit is 7733
    your memory page size is 4096 bytes
    detected max file descriptor number: 1024
    lock engine: pthread robust mutexes
    thunder lock: disabled (you can enable it with --thunder-lock)
    uwsgi socket 0 bound to TCP address 0.0.0.0:5000 fd 3
    Python version: 2.7.6 (default, Jun 22 2015, 18:01:27)  [GCC 4.8.2]
    *** Python threads support is disabled. You can enable it with --enable-threads ***
    Python main interpreter initialized at 0xb98500
    your server socket listen backlog is limited to 100 connections
    your mercy for graceful operations on workers is 60 seconds
    mapped 72768 bytes (71 KB) for 1 cores
    *** Operational MODE: single process ***
    Traceback (most recent call last):
      File "./wsgi.py", line 17, in <module>
        app.run(host=os.getenv('IP', '0.0.0.0'), port = int(os.getenv('PORT',5000)))
      File "/home/xiaoyi/tests/env/local/lib/python2.7/site-packages/flask/app.py", line 772, in run
        run_simple(host, port, self, **options)
      File "/home/xiaoyi/tests/env/local/lib/python2.7/site-packages/werkzeug/serving.py", line 694, in run_simple
        inner()
      File "/home/xiaoyi/tests/env/local/lib/python2.7/site-packages/werkzeug/serving.py", line 656, in inner
        fd=fd)
      File "/home/xiaoyi/tests/env/local/lib/python2.7/site-packages/werkzeug/serving.py", line 550, in make_server
        passthrough_errors, ssl_context, fd=fd)
      File "/home/xiaoyi/tests/env/local/lib/python2.7/site-packages/werkzeug/serving.py", line 464, in __init__
        HTTPServer.__init__(self, (host, int(port)), handler)
      File "/usr/lib/python2.7/SocketServer.py", line 419, in __init__
        self.server_bind()
      File "/usr/lib/python2.7/BaseHTTPServer.py", line 108, in server_bind
        SocketServer.TCPServer.server_bind(self)
      File "/usr/lib/python2.7/SocketServer.py", line 430, in server_bind
        self.socket.bind(self.server_address)
      File "/usr/lib/python2.7/socket.py", line 224, in meth
        return getattr(self._sock,name)(*args)
    socket.error: [Errno 98] Address already in use
    unable to load app 0 (mountpoint='') (callable not found or import error)
    *** no app loaded. going in full dynamic mode ***
    *** uWSGI is running in multiple interpreter mode ***
    spawned uWSGI worker 1 (and the only) (pid: 13702, cores: 1)
    ^A--- no python application found, check your startup logs for errors ---
    [pid: 13702|app: -1|req: -1/1] 14.28.139.49 () {34 vars in 644 bytes} [Sat     Apr  9 16:12:50 2016] GET / => generated 21 bytes in 0 msecs (HTTP/1.1 500) 2 headers in 83 bytes (0 switches on core 0)

Bien que le message d'erreur ci-dessus indique que l'adresse a été utilisée, plusieurs adresses et ports qui occupent l'adresse et le port n'ont pas été ouverts. Je ne comprends pas cela au début, veuillez me donner quelques conseils !