flask+uwsgi+nginx简单部署应用

• 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 
      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)