1，创建虚拟环境： mkvirtualenv flask_uwsgi_demo

2，安装flask ： pip install flask

3，安装和配置uwsgi：pip install uwsgi

vim uwsgi.ini

[uwsgi]
#使用nginx连接时使用
socket=0.0.0.0:10000
#这个必须写，不然会报找不到application
callable = app    
#项目目录绝对路径
chdir=/project/flask_demo
#指定flask运行的文件，是一个相对路径
wsgi-file =flask_uwsgi_demo.py   
#指定解释器目录，每一个虚拟环境的python目录不同，用which python查看
home=/root/Envs/flask_uwsgi_demo
processes=4
threads=2
master=True
pidfile=uwsgi.pid

4，配置nginx： vi /etc/nginx/nginx.conf

server {
    listen       80;
    server_name  10.0.0.11;  #（注意不带斜杠，加引号）
    location /index {
        include uwsgi_params; 
        uwsgi_pass  10.0.0.11:10000;
        }
    }

5，编写flask：vim flask_uwsgi_demo.py

from flask import Flask

app = Flask(__name__)

@app.route("/index")
def helloWorld():
    return "Hello World"

if __name__ == '__main__':
    app.run(host='0.0.0.0', port=10000)

6，启动uwsgi，启动nginx，访问

(flask_uwsgi_demo) [root@slave flask_demo]# uwsgi --ini uwsgi.ini 

[root@slave project]# /usr/sbin/nginx    #如果是重启，加上-s reload

10.0.0.11/index

7，目录结构

[root@slave project]# tree
├── flask_demo
    ├── flask_uwsgi_demo.py
    ├── __pycache__
    │   └── flask_uwsgi_demo.cpython-34.pyc
    ├── uwsgi.ini
    └── uwsgi.pid

8，启动uwsgi报错

以下报错，没有进入虚拟环境，或者uwsgi.ini配置错误，没找对环境

*** Operational MODE: preforking+threaded ***
Traceback (most recent call last):
  File "./flask_uwsgi_demo.py", line 1, in <module>
    from flask import Flask
ImportError: No module named 'flask'
unable to load app 0 (mountpoint='') (callable not found or import error)

以下报错，没有找到app，主要是配置文件错误，我添加了callable = app，问题解决

*** Operational MODE: preforking+threaded ***
unable to find "application" callable in file flask_uwsgi_demo.py
unable to load app 0 (mountpoint='') (callable not found or import error)
*** no app loaded. going in full dynamic mode ***
uWSGI running as root, you can use --uid/--gid/--chroot options

以下正确

*** Operational MODE: preforking+threaded ***
WSGI app 0 (mountpoint='') ready in 0 seconds on interpreter 0x121ff90 pid: 13743 (default app)