flask + uwsgi 生产环境

https://www.digitalocean.com/community/tutorials/how-to-deploy-flask-web-applications-using-uwsgi-behind-nginx-on-centos-6-4

http://vladikk.com/2013/09/12/serving-flask-with-nginx-on-ubuntu/

https://www.linode.com/docs/websites/nginx/wsgi-using-uwsgi-and-nginx-on-centos-5

https://zafiel.wingall.com/archives/7513

yum -y install nginx
rm -rf /etc/nginx/conf.d/default.conf

yum -y install python-devel python-pip python-virtualenv gcc

mkdir -p /opt/demo/app

virtualenv /opt/demo/venv
source /opt/demo/venv/bin/activate
pip install flask -i https://pypi.douban.com/simple
pip install uwsgi -i https://pypi.douban.com/simple

pip freeze
Flask==0.11.1
Jinja2==2.8
MarkupSafe==0.23
Werkzeug==0.11.11
click==6.6
itsdangerous==0.24
uWSGI==2.0.14

cat > /opt/demo/app/__init__.py << EOF
#!/usr/bin/python
# -*- coding: utf-8 -*-

from flask import Flask
app = Flask(__name__)

@app.route("/")
def hello():
    return "Hello World!"

if __name__ == "__main__":
    app.run(host='0.0.0.0', port=8000)
EOF

cat > /opt/demo/run.py << EOF
#!/usr/bin/python
# -*- coding: utf-8 -*-

from app import app

if __name__ == "__main__":
    app.run(host='0.0.0.0', port=8000)
EOF

python /opt/demo/run.py
 * Running on http://0.0.0.0:8000/ (Press CTRL+C to quit)

deactivate

cat > /etc/nginx/conf.d/demo.conf << EOF
server {
    listen      80;
    server_name localhost;
    charset     utf-8;
    client_max_body_size 100M;

    location / {
        try_files \$uri @demo;
    }

    location @demo {
        include uwsgi_params;
        uwsgi_pass unix:///tmp/demo_uwsgi.sock;
    }
}
EOF

/etc/init.d/nginx start && chkconfig nginx on

cat > /opt/demo/demo_uwsgi.ini << EOF
[uwsgi]
base = /opt/demo

app = run
module = %(app)
callable = app

virtualenv = %(base)/venv
pythonpath = %(base)

socket = /tmp/%n.sock
chmod-socket = 666

vacuum = true
daemonize = %(base)/%n.log

master = true
worker = 1
threads = 2
max-requests = 1000
EOF

cat > /etc/init.d/demo_uwsgi << EOF
#!/bin/bash
#
# bye-reader start script
#
# chkconfig: 345 99 1
# description: demo_uwsgi start script
# processname: demo_uwsgi
# pidfile: /var/run/demo_uwsgi.pid
#

# Source function library.
. /etc/init.d/functions

PROGNAME="demo_uwsgi"
PID="/var/run/\$PROGNAME.pid"
LOCK="/var/run/\$PROGNAME.lock"
RETVAL=0
PROG="/opt/demo/venv/bin/uwsgi"

[ -f \$PROG ] || exit 0

start() {
        echo -n "Starting \$PROGNAME: "
        daemon \$PROG --ini /opt/demo/\$PROGNAME.ini --uid nginx --gid nginx --pidfile \$PID
        echo
        [ \$RETVAL = 0 ] && touch \$LOCK
        return \$RETVAL
}

stop() {
        echo -n "Stopping \$PROGNAME: "
        killproc -p \$PID \$PROGNAME -INT
        RETVAL=\$?
        echo
        [ \$RETVAL = 0 ] && rm -f \$LOCK \$PID
}

show_status() {
        status \$PROGNAME
}

case "\$1" in
    start)
        start
        ;;
    stop)
        stop
        ;;
    restart)
        stop
        start
        ;;
    status)
        show_status
        ;;
    *)
        echo "Usage: \$PROGNAME {start|stop|restart|status}"
        RETVAL=2
        ;;
esac
exit \$RETVAL
EOF

chmod 755 /etc/init.d/demo_uwsgi
chkconfig --add demo_uwsgi
chkconfig demo_uwsgi on

/etc/init.d/demo_uwsgi start
Starting demoapp_uwsgi: [uWSGI] getting INI configuration from /opt/demoapp/demoapp_uwsgi.ini
                                                           [  OK  ]
ps aux|grep uwsgi
nginx     1856  1.9  1.5 219276 16084 ?        S    15:12   0:00 /opt/demo/venv/bin/uwsgi --ini /opt/demoapp/demo_uwsgi.ini --uid nginx --gid nginx --pidfile /var/run/demo_uwsgi.pid
nginx     1861  0.0  1.2 295056 12820 ?        Sl   15:12   0:00 /opt/demo/venv/bin/uwsgi --ini /opt/demoapp/demo_uwsgi.ini --uid nginx --gid nginx --pidfile /var/run/demo_uwsgi.pid
root      1864  0.0  0.0 103312   908 pts/0    S+   15:12   0:00 grep uwsgi