TK-Student: October 2013

This post includes how to install nginx, uwsgi, flask and python environment.

Some Tools Installation

yum -y groupinstall "Development tools"
yum -y install gcc ncurses-devel zlib-devel bzip2-devel openssl-devel make

Python Installation

cd /var/tmp
wget http://www.python.org/ftp/python/2.7.5/Python-2.7.5.tgz
tar zxvf Python-2.7.5taz
cd Python-2.7.5
./configure --with-threads --enable-shared
make && make altinstall

Python check (check your python installation)

cd /var/tmp
python2.7 (after this command if you enter the python console that means your python installation is successful, otherwise maybe you will encounter "python2.7: error while loading shared libraries: libpython2.7.so.1.0: cannot open shared object file: No such file or directory")
vi /etc/ld.so.conf (add /usr/local/lib into this document)
/sbin/ldconfig
/sbin/ldconfig -v
python2.7 (double check again, this time you can enter the python console)

Pip Installation

cd /var/tmp
wget http://python-distribute.org/distribute_setup.py
python2.7 distribute_setup.py
wget https://raw.github.com/pypa/pip/master/contrib/get-pip.py
python2.7 get-pip.py

Virtualenvwrapper Installation

pip-2.7 install virtualenvwrapper

Create User for nginx

groupadd nginx
useradd -g nginx nginx
passwd nginx
su nginx
vi ~/.bashrc (change to nginx user and add the following two lines)

export VIRTUALENVWRAPPER_PYTHON=/usr/local/bin/python2.7
source /usr/local/bin/virtualenvwrapper.sh 2 >/dev/null

source ~/.bashrc #reload this file

Create Virtualenv and uwsgi installation

su nginx

mkvirtualenv -p /usr/local/bin/python2.7 env27

workon env27 ##change to env27

pip-2.7 install uwsgi # install uwsgi

Nginx Installation

su root
yum -y install pcre-devel
cd /var/tmp
wget http://nginx.org/download/nginx-1.2.3.tar.gz
su nginx # change to nginx
tar xvfz nginx-1.2.3.tar.gz
cd nginx-1.2.3
./configure --user=nginx --group=nginx --prefix=/home/nginx/SAgent --with-http_ssl_module --with-http_gzip_static_module --with-http_stub_status_module
make && make install

Create some folders for webapps:

mkdir /home/nginx/SAgent/sites-available
mkdir /home/nginx/SAgent/sites-enabled
mkdir /home/nginx/SAgent/webapps
mkdir /home/nginx/SAgent/uwsgi
mkdir /home/nginx/SAgent/uwsgi/conf
mkdir /home/nginx/SAgent/uwsgi/logs
mkdir /home/nginx/SAgent/uwsgi/run/

Create nginx as service:

sudo vi /etc/init.d/nginx (put the following content in this new file)

#!/bin/sh
#
# nginx - this script starts and stops the nginx daemin
#
# chkconfig: 2345 80 25
# description: Startup script for nginx webserver. Place in /etc/init.d and
# For CentOS/Redhat run: 'chkconfig --add nginx'
# processname: nginx
# config: /home/nginx/SAgent/conf/nginx.conf
# pidfile: /home/nginx/SAgent/logs/nginx.pid

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

# Source networking configuration.
. /etc/sysconfig/network

# Check that networking is up.
[ "$NETWORKING" = "no" ] && exit 0

nginx="/home/nginx/SAgent/sbin/nginx"
prog=$(basename $nginx)

NGINX_CONF_FILE="/home/nginx/SAgent/conf/nginx.conf"
lockfile=/var/lock/subsys/nginx

start() {
[ -x $nginx ] || exit 5
[ -f $NGINX_CONF_FILE ] || exit 6
echo -n $"Starting $prog: "
daemon $nginx -c $NGINX_CONF_FILE
retval=$?
echo
[ $retval -eq 0 ] && touch $lockfile
return $retval
}

stop() {
echo -n $"Stopping $prog: "
killproc $prog -QUIT
retval=$?
echo
[ $retval -eq 0 ] && rm -f $lockfile
return $retval
}

restart() {
configtest || return $?
stop
sleep 1
start
}

reload() {
configtest || return $?
echo -n $"Reloading $prog: "
killproc $nginx -HUP
RETVAL=$?
echo
}
force_reload() {
restart
}

configtest() {
$nginx -t -c $NGINX_CONF_FILE
}

rh_status() {
status $prog
}

rh_status_q() {
rh_status >/dev/null 2>&1
}

case "$1" in
start)
rh_status_q && exit 0
$1
;;
stop)
rh_status_q || exit 0
$1
;;
restart|configtest)
$1
;;
reload)
rh_status_q || exit 7
$1
;;
force-reload)
force_reload
;;
status)
rh_status
;;
condrestart|try-restart)
rh_status_q || exit 0
;;
*)
echo $"Usage: $0 {start|stop|status|restart|condrestart|try-restart|reload|force-reload|configtest}"
exit 2
esac

sudo chmod +x /etc/init.d/nginx
sudo /sbin/chkconfig nginx on
sudo /sbin/chkconfig --list nginx # check

Create uwsgi as service:

sudo vi /etc/init.d/uwsgi # put the following content in this new file

#!/bin/sh
#
# uwsgi - This script starts and stops all configured uwsgi applications
#
# chkconfig: 2345 80 25
# description: uWSGI is a program to run applications adhering to the
# Web Server Gateway Interface.
# processname: uwsgi
# config: /etc/sysconfig/uwsgi

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

# Source networking configuration.
. /etc/sysconfig/network

# Check that networking is up.
[ "$NETWORKING" = "no" ] && exit 0

# initialize python virtualenv
VIRT_ENV=env27 #env33 #env27 #env3.21
PY_VER=2.7 #3.3 #2.7 #3.2
PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin
WORKON_HOME=/home/nginx/.virtualenvs
VIRTUALENVWRAPPER_PYTHON=/usr/local/bin/python$PY_VER
. /usr/local/bin/virtualenvwrapper.sh 2> /dev/null
workon $VIRT_ENV

uwsgi=`which uwsgi`
prog=$(basename "$uwsgi")
UWSGI_ROOT="/home/nginx/SAgent/uwsgi"
UWSGI_CONF_DIR="$UWSGI_ROOT/conf"
UWSGI_LOG_FILE="$UWSGI_ROOT/uwsgi.log"
UWSGI_PID_FILE="/var/run/uwsgi.pid"
# force to all vassals
export UWSGI_VASSAL_HOME="$WORKON_HOME/$VIRT_ENV"
UWSGI_ARGS="--emperor $UWSGI_CONF_DIR --binary-path $uwsgi"

start() {
[ -x $uwsgi ] || exit 5
[ -d $UWSGI_CONF_DIR ] || exit 6
echo -n $"Starting $prog: "
daemon --pidfile="$UWSGI_PID_FILE" $uwsgi $UWSGI_ARGS --pidfile $UWSGI_PID_FILE --daemonize $UWSGI_LOG_FILE
retval=$?
echo
return $retval
}

stop() {
echo -n $"Stopping $prog: "
killproc -p "$UWSGI_PID_FILE" $prog
retval=$?
echo
return $retval
}

restart() {
stop
sleep 1
start
}
reload() {
echo -n $"Reloading $prog: "
killproc -p "$UWSGI_PID_FILE" "$prog" -HUP
retval=$?
echo
return $retval
}
force_reload() {
restart
}

rh_status() {
status -p "$UWSGI_PID_FILE" "$prog"
}

rh_status_q() {
rh_status >/dev/null 2>&1
}

case "$1" in
start)
rh_status_q && exit 0
$1
;;
stop)
rh_status_q || exit 0
$1
;;
restart)
$1
;;
reload)
rh_status_q || exit 7
$1
;;
force-reload)
force_reload
;;
status)
rh_status
;;
*)
echo $"Usage: $0 {start|stop|status|restart|reload|force-reload}"
exit 2
esac

sudo chmod +x /etc/init.d/uwsgi
sudo /sbin/chkconfig uwsgi on
sudo /sbin/chkconfig --list uwsgi # check

Flask webframework installation

cd /var/tmp
wget http://pypi.python.org/packages/source/F/Flask/Flask-0.10.tar.gz
tar zxvf Flask-0.10.tar.gz
cd Flask-0.10
python2.7 setup.py install

Create demo application

mkdir /home/nginx/DemoAgent/sites-available/demo
mkdir /home/nginx/DemoAgent/webapps/demo
vim /home/nginx/DemoAgent/webapps/demo/demo.py # add the following python code in demo.py

from flask import Flask

app = Flask(__name__)

@app.route("/")

def hello():

return "Hello World!"

if __name__ == "__main__":

app.run()

python2.7 demo.py # check 127.0.0.1:5000, you can see the hello world.

Some configurations for nginx and uwsgi

ln -s /home/nginx/DemoAgent/sites-available/demo /home/nginx/DemoAgent/sites-enabled/demo # create symbolic link
vi /home/nginx/DemoAgent/uwsgi/conf/demo.ini # the ini file must has the same name as webapps folder. e.g., demo, add the following content into demo.ini

[uwsgi]
processes = 1
master = true
limit-as = 1024
reload-on-as = 512
reload-on-rss = 256
memory-report = true
socket = /home/nginx/DemoAgent/uwsgi/run/%n.sock
logto = /home/nginx/DemoAgent/uwsgi/logs/%n.log
manage-script-name = 1
auto-procname = true
enable-threads = 5
procanme-prefix-spaced = %n
chdir = /home/nginx/DemoAgent/webapps/%n
mount = /%n=/home/nginx/DemoAgent/webapps/%n/demo.py
callable = app

vim /home/nginx/DemoAgent/conf/nginx.conf # in {http{server}} section, modify location section content

location /demo {

set $app demo;

include uwsgi_params;

uwsgi_param SCRIPT_NAME "/${app}";

uwsgi_param UWSGI_SCRIPT index;

uwsgi_param UWSGI_MODULE index;

uwsgi_param UWSGI_PYHOME "${document_root}/${app}";

uwsgi_param UWSGI_CHDIR "${document_root}/${app}";

uwsgi_pass unix:/home/nginx/DemoAgent/uwsgi/run/${app}.sock;

}

service nginx start
service uwsgi start

URL: 127.0.0.1/demo # you can see the Hello World responded from demo.py

TK-Student

Friday, October 4, 2013

Python framework Flask+Nginx+UWSGI on virtualenv

This post includes how to install nginx, uwsgi, flask and python environment.

Some Tools Installation

Python Installation

Python check (check your python installation)

Pip Installation

Virtualenvwrapper Installation

pip-2.7 install virtualenvwrapper

Create User for nginx

Create Virtualenv and uwsgi installation

su nginx

mkvirtualenv -p /usr/local/bin/python2.7 env27

workon env27 ##change to env27

pip-2.7 install uwsgi # install uwsgi

Nginx Installation

Create some folders for webapps:

Create nginx as service:

Create uwsgi as service:

Flask webframework installation

Create demo application

Some configurations for nginx and uwsgi

Friday, October 4, 2013

Python framework Flask+Nginx+UWSGI on virtualenv

This post includes how to install nginx, uwsgi, flask and python environment.

Some Tools Installation

Python Installation

Python check (check your python installation)

Pip Installation

Virtualenvwrapper Installation

pip-2.7 install virtualenvwrapper

Create User for nginx

Create Virtualenv and uwsgi installation

su nginx mkvirtualenv -p /usr/local/bin/python2.7 env27 workon env27 ##change to env27 pip-2.7 install uwsgi # install uwsgi

Nginx Installation

Create some folders for webapps:

Create nginx as service:

Create uwsgi as service:

Flask webframework installation

Create demo application

Some configurations for nginx and uwsgi

su nginx

mkvirtualenv -p /usr/local/bin/python2.7 env27

workon env27 ##change to env27

pip-2.7 install uwsgi # install uwsgi