Python + flask + uwsgi + gevent + nginx Environment Setup (non-blocking)

Flask is a miniature web development framework in Python. In debug mode or simple Uwsgi mode, flask is blocking mode, that is, only one request can be activated at a time, or the number of requests in the UWSGI open multi-process, in response to a known request; Here we use Uwsgi and gevent with Nginx to solve the flask blocking mode.

1. Environment

CentOS Linux release 7.0.1406 (Core)

Python 2.7.5

2. Installation Class Library

Yum install python-devel zlib-devel bzip2-devel pcre-devel openssl-devel ncurses-devel sqlite-devel readline-devel Tk-devel GCC

3. Download and install Python package management software pip

View Python version

[Email protected] ~]# Python-vpython 2.7.5

Download pip-7.1.0.tar.gz

wget https://pypi.python.org/packages/source/p/pip/pip-7.1.0.tar.gz#md5=d935ee9146074b1d3f26c5f0acfd120e

Unzip the installation

Tar zxf pip-7.1.0.tar.gzcd pip-7.1.0python setup.py install## prompts for the following information, without error, indicating successful installation installed/usr/lib/python2.7/ site-packages/pip-7.1.0-py2.7.eggprocessing dependencies for pip==7.1.0finished processing dependencies for pip== 7.1.0

Download setuptools-18.1.tar.gz

wget https://pypi.python.org/packages/source/s/setuptools/setuptools-18.1.tar.gz#md5=f72e87f34fbf07f299f6cb46256a0b06

Unzip the installation

Tar zxf setuptools-18.1.tar.gz cd Setuptools-18.1python setup.py install## prompts for the following information, without error, indicating successful installation installed/usr/lib/ python2.7/site-packages/setuptools-18.1-py2.7.eggprocessing Dependencies for setuptools==18.1finished processing Dependencies for setuptools==18.1

4. Install flask/uwsgi/gevent/ Nignx

Installing Flask

Pip install flask## prompts for the following information, without error, indicating successful installation successfully installed jinja2-2.8 MarkupSafe-0.23 Werkzeug-0.10.4 flask-0.10.1 itsdangerous-0.24

Installing Uwsgi

Pip install uwsgi## prompts for the following information, without error, indicating successful installation collecting Uwsgi Using cached uwsgi-2.0.11.1.tar.gzinstalling collected packages : Uwsgi Running setup.py Install for uwsgisuccessfully installed uwsgi-2.0.11.1

Installing Gevent

Pip install gevent## prompts the following information, without error, indicating successful installation Running setup.py install for Greenlet Running setup.py install for geventsucces Sfully installed gevent-1.0.2 greenlet-0.4.7

download and compile the installation Nginx

Useradd wwwwget Http://nginx.org/download/nginx-1.8.0.tar.gztar 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_modulemakemake Install

5. New Flask app File/data/wwwroot/myapp.py:

[[email protected] ~]# mkdir/data/wwwroot-p[[email protected] ~]# Cd/data/wwwroot/[[email protected] wwwroot]# cat Myap P.pyfrom flask Import Flaskapp = Flask (__name__) @app. Route ('/') def hello_world (): Return ' Hello world! ' if __name__ = = ' __main__ ': App.run ()

6, configuration Uwsgi and Gevent

(1) Configuring the Uwsgi.ini file Vim/usr/local/nginx/conf/uwsgi.ini

[uwsgi]    master = true    vhost = true     workers = 2    reload-mercy = 10     vacuum = true    max-requests = 1000     Limit-as = 6048    chmod-socket = 666    socket  = /tmp/uwsgi.sock    chdir = /data/wwwroot/        # #flask  app  Catalogue     module = myapp                ## flask app  name, which is our  myapp.py     callable = app    touch-reload  = /data/wwwroot/    pidfile = /var/run/uwsgi.pid     Daemonize = /usr/local/nginx/logs/uwsgi.log    gevent = 100         ##  join  GEVENT = 100&NBSP, non-blocking mode

(2) Configure cat/data/wwwroot/myapp.py again

# # Add the following two lines to the file header from gevent import Monkeymonkey.patch_all () from flask import Flaskapp = Flask (__name__) @app. Route ('/') def Hello_world (): Return ' Hello world! ' if __name__ = = ' __main__ ': App.run ()

(3) Start Uwsgi, of course, you can write your own startup script, where the test will not be written

/usr/bin/uwsgi--ini/usr/local/nginx/conf/uwsgi.ini

7. Configure Nginx

(1) Add configuration file cat/usr/local/nginx/conf/vhosts/uwsgi_flask.conf

server {Listen 80;server_name 192.168.1.105;index index.htm index.html;location/{include Uwsgi_params;uwsgi_pass Unix :/tmp/uwsgi.sock;}}

(2) Modify Nginx; add include vhosts/uwsgi_flask.conf;

(3) Start Nginx

Cd/usr/local/nginx/sbin/./nginx

8. Visit http://192.168.1.105

Well, the access is normal, if you want to test flask blocking mode and non-blocking mode, you can add multiple URLs in myapp.py, plus sleep;

Python + flask + uwsgi + gevent + nginx Environment Setup (non-blocking)