不要着急

先来看问题一，报错信息

gunicorn.errors.HaltServer: <HaltServer 'Worker failed to boot.' 3>

启动gunicorn报错：

# gunicorn -b :9008 -w 2 webserver:app
2013-12-10 09:12:58 [29701] [INFO] Starting gunicorn 0.14.3
2013-12-10 09:12:58 [29701] [INFO] Listening at: http://0.0.0.0:9008 (29701)
2013-12-10 09:12:58 [29701] [INFO] Using worker: sync
2013-12-10 09:12:58 [29704] [INFO] Booting worker with pid: 29704
2013-12-10 09:12:58 [29705] [INFO] Booting worker with pid: 29705
2013-12-10 09:12:58 [29704] [INFO] Worker exiting (pid: 29704)
2013-12-10 09:12:58 [29705] [INFO] Worker exiting (pid: 29705)
Traceback (most recent call last):
  File "/root/.virtualenvs/py268/bin/gunicorn", line 8, in <module>
    load_entry_point('gunicorn==0.14.3', 'console_scripts', 'gunicorn')()
  File "/root/.virtualenvs/py268/lib/python2.6/site-packages/gunicorn/app/wsgiapp.py", line 32, in run
    WSGIApplication("%prog [OPTIONS] APP_MODULE").run()
  File "/root/.virtualenvs/py268/lib/python2.6/site-packages/gunicorn/app/base.py", line 129, in run
    Arbiter(self).run()
  File "/root/.virtualenvs/py268/lib/python2.6/site-packages/gunicorn/arbiter.py", line 184, in run
    self.halt(reason=inst.reason, exit_status=inst.exit_status)
  File "/root/.virtualenvs/py268/lib/python2.6/site-packages/gunicorn/arbiter.py", line 279, in halt
    self.stop()
  File "/root/.virtualenvs/py268/lib/python2.6/site-packages/gunicorn/arbiter.py", line 327, in stop
    self.reap_workers()
  File "/root/.virtualenvs/py268/lib/python2.6/site-packages/gunicorn/arbiter.py", line 413, in reap_workers
    raise HaltServer(reason, self.WORKER_BOOT_ERROR)
gunicorn.errors.HaltServer: <HaltServer 'Worker failed to boot.' 3>

这时会发现是python2.6在运行gunicorn

先卸载掉所有python版本下的gunicorn

apt-get remove gunicorn 

pip uninstall gunicorn 

pip3 uninstall gunicorn 

安装gunicorn3

apt-get install gunicorn3 

解决！