Flask是Python中一个微型的Web开发框架。在debug 模式 或 单纯的 uwsgi模式下,flask是阻塞模式的,也就是说一次只能效应一个请求,或者在uwsgi 开启多进程,响应已知的请求个数;我们这里使用 uwsgi 和 gevent 配合nginx 解决flask的阻塞模式。
1、环境
CentOS Linux release 7.0.1406 (Core)
Python 2.7.5
2、安装类库
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yum install python-devel zlib-devel bzip2-devel pcre-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gcc |
3、下载并安装python 包管理软件 pip
查看python 版本
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[root@localhost ~]# python -V Python 2.7.5 |
下载 pip-7.1.0.tar.gz
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wget https://pypi.python.org/packages/source/p/pip/pip-7.1.0.tar.gz#md5=d935ee9146074b1d3f26c5f0acfd120e |
解压安装
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tar zxf pip-7.1.0.tar.gz cd pip-7.1.0 python setup.py install ## 提示下列信息,,且无报错,说明安装成功 Installed /usr/lib/python2.7/site-packages/pip-7.1.0-py2.7.egg Processing dependencies for pip==7.1.0 Finished processing dependencies for pip==7.1.0 |
下载 setuptools-18.1.tar.gz
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wget https://pypi.python.org/packages/source/s/setuptools/setuptools-18.1.tar.gz#md5=f72e87f34fbf07f299f6cb46256a0b06 ## 解压安装 tar zxf setuptools-18.1.tar.gz cd setuptools-18.1 python setup.py install ## 提示下列信息,,且无报错,说明安装成功 Installed /usr/lib/python2.7/site-packages/setuptools-18.1-py2.7.egg Processing dependencies for setuptools==18.1 Finished processing dependencies for setuptools==18.1 |
4、安装 flask / uwsgi / gevent / nignx
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### 安装 flask pip install flask ## 提示下列信息,,且无报错,说明安装成功 Successfully installed Jinja2-2.8 MarkupSafe-0.23 Werkzeug-0.10.4 flask-0.10.1 itsdangerous-0.24 ### 安装uwsgi pip install uwsgi ## 提示下列信息,,且无报错,说明安装成功 Collecting uwsgi Using cached uwsgi-2.0.11.1.tar.gz Installing collected packages: uwsgi Running setup.py install for uwsgi Successfully installed uwsgi-2.0.11.1 ### 安装gevent pip install gevent ## 提示下列信息,,且无报错,说明安装成功 Running setup.py install for greenlet Running setup.py install for gevent Successfully installed gevent-1.0.2 greenlet-0.4.7 ### 下载 并 编译安装nginx useradd www wget http://nginx.org/download/nginx-1.8.0.tar.gz tar zxf nginx-1.8.0.tar.gz cd nginx-1.8.0 ./configure --prefix=/usr/local/nginx --user=www --group=www --with-http_stub_status_module --with-http_ssl_module make make install |
5、 新建flask app 文件 /data/wwwroot/myapp.py
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[root@localhost ~]# mkdir /data/wwwroot -p [root@localhost ~]# cd /data/wwwroot/ [root@localhost wwwroot]# cat myapp.py from flask import Flask app = Flask(__name__) @app.route('/') def hello_world(): return 'Hello World!' if __name__ == '__main__': app.run() |
6、配置 uWSGI 及 gevent
(1)配置 uwsgi.ini 文件 vim /usr/local/nginx/conf/uwsgi.ini
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[uwsgi] chmod-socket = 666 socket = /tmp/uwsgi.sock master = true pidfile = /var/run/uwsgi.pid processes = 4 workers = 1 pythonpath = /data/wwwroot ##flask app 目录 pythonpath = /data/ callable = app profiler= true memory-report=true enable-threads = true logdate=true limit-as=6048 daemonize=/data/wwwroot/uwsgi_sapublish.log gevent = 100 ## 加入 gevent = 100 ,非阻塞模式 |
(2) 再次配置 cat /data/wwwroot/myapp.py
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## 在文件头加入下面两行 from gevent import monkey monkey.patch_all() from flask import Flask app = Flask(__name__) @app.route('/') def hello_world(): return 'Hello World!' if __name__ == '__main__': app.run() |
(3)启动 uwsgi ,当然你可以自己写个启动脚本,这里测试就不写了
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/usr/bin/uwsgi --ini /usr/local/nginx/conf/uwsgi.ini |
7、配置nginx
(1)添加配置文件 cat /usr/local/nginx/conf/vhosts/uwsgi_flask.conf
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server { listen 8082 default_server; server_name 192.168.1.105 ; location / { #uwsgi_pass 127.0.0.1:5000; include uwsgi_params; uwsgi_pass unix:/tmp/uwsgi.sock; uwsgi_param UWSGI_CHDIR /data/wwwroot/; uwsgi_param UWSGI_SCRIPT myapp; ### myapp.py app文件名称 access_log /data/wwwroot/app_access.log; } } |
(2)修改nginx ;加入include vhosts/uwsgi_flask.conf;
(3)启动nginx
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cd /usr/local/nginx/sbin/ ./nginx |
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