$ sudo apt-get update
$ sudo apt-get install gunicorn

# filename：test.py
def app(environ, start_response):
"""Simplest possible application object"""
data = 'Hello, World!\n'
status = '200 OK'
response_headers = [
('Content-type','text/plain'),
('Content-Length', str(len(data)))
]
start_response(status, response_headers)
return iter([data])

# example.py
bind = "127.0.0.1:8000"
workers = 2

# gunicorn.py
import logging
import logging.handlers
from logging.handlers import WatchedFileHandler
import os
import multiprocessing
bind = '127.0.0.1:8000'   #绑定ip和端口号
backlog = 512        #监听队列
chdir = '/home/test/server/bin' #gunicorn要切换到的目的工作目录
timeout = 30   #超时
worker_class = 'gevent' #使用gevent模式，还可以使用sync 模式，默认的是sync模式
workers = multiprocessing.cpu_count() * 2 + 1  #进程数
threads = 2 #指定每个进程开启的线程数
loglevel = 'info' #日志级别，这个日志级别指的是错误日志的级别，而访问日志的级别无法设置
access_log_format = '%(t)s %(p)s %(h)s "%(r)s" %(s)s %(L)s %(b)s %(f)s" "%(a)s"'  #设置gunicorn访问日志格式，错误日志无法设置
"""
其每个选项的含义如下：
h     remote address
l     '-'
u     currently '-', may be user name in future releases
t     date of the request
r     status line (e.g. ``GET / HTTP/1.1``)
s     status
b     response length or '-'
f     referer
a     user agent
T     request time in seconds
D     request time in microseconds
L     request time in decimal seconds
p     process ID
"""
accesslog = "/home/test/server/log/gunicorn_access.log"   #访问日志文件
errorlog = "/home/test/server/log/gunicorn_error.log"    #错误日志文件