deploy.py

import sys
import os
import socket
import multiprocessing

APP_NAME = 'zwiki'
APP_URL = 'www.zwiki.duckdns.org'
APP_PORT = 8013

mainIP = [(s.connect(('8.8.8.8', 80)), s.getsockname()[0], s.close()) for s in [socket.socket(socket.AF_INET, socket.SOCK_DGRAM)]][0][1]
curDir = os.getcwd()
workers = multiprocessing.cpu_count() * 2 + 1
workers = 1
init_conf = """
# This should be placed in /etc/init.d directory
# start with
# sudo /etc/init.d/%(appname)s start
# stop with
# sudo /etc/init.d/%(appname)s start

dir="%(dir)s"
user="nobody"
cmd="gunicorn -b %(ip)s:%(port)s -w %(workers)s -t 600 app:app"

name=`basename $0`
pid_file="/var/run/$name.pid"
stdout_log="/var/log/$name.log"
stderr_log="/var/log/$name.err"

get_pid() {
    cat "$pid_file"
}

is_running() {
    [ -f "$pid_file" ] && ps `get_pid` > /dev/null 2>&1
}

case "$1" in
    start)
    if is_running; then
        echo "Already started"
    else
        echo "Starting $name"
        cd "$dir"
        sudo -u "$user" $cmd >> "$stdout_log" 2>> "$stderr_log" &
        echo $! > "$pid_file"
        if ! is_running; then
            echo "Unable to start, see $stdout_log and $stderr_log"
            exit 1
        fi
    fi
    ;;
    stop)
    if is_running; then
        echo -n "Stopping $name.."
        kill `get_pid`
        for i in {1..10}
        do
            if ! is_running; then
                break
            fi

            echo -n "."
            sleep 1
        done
        echo

        if is_running; then
            echo "Not stopped; may still be shutting down or shutdown may have failed"
            exit 1
        else
            echo "Stopped"
            if [ -f "$pid_file" ]; then
                rm "$pid_file"
            fi
        fi
    else
        echo "Not running"
    fi
    ;;
    restart)
    $0 stop
    if is_running; then
        echo "Unable to stop, will not attempt to start"
        exit 1
    fi
    $0 start
    ;;
    status)
    if is_running; then
        echo "Running"
    else
        echo "Stopped"
        exit 1
    fi
    ;;
    *)
    echo "Usage: $0 {start|stop|restart|status}"
    exit 1
    ;;
esac

exit 0
""" % {'port':APP_PORT,'dir':curDir,'appname':APP_NAME.replace(' ',''),'ip':mainIP, 'workers':str(workers)}


nginx_block = """
server {
	# SERVER BLOCK FOR %(appname)s
	listen   80; ## listen for ipv4; this line is default and implied

	root %(dir)s;
	index index.html index.htm;

	access_log /etc/nginx/logs/access-%(appname)s.log;
	error_log /etc/nginx/logs/error-%(appname)s.log;

	server_name %(url)s;

	location / {
		proxy_pass http://%(ip)s:%(port)s;
		proxy_redirect off;
		proxy_set_header X-Real-IP $remote_addr;
		proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
		#proxy_set_header Host $http_host;
		proxy_set_header X-NginX-Proxy true;
	}

}
""" % {'port':APP_PORT,'dir':curDir,'appname':APP_NAME.replace(' ',''),'url':APP_URL + ' ' + APP_URL.replace('www.',''),'ip':mainIP}

####################


print 'generating init.d configuration file'
with open('/etc/init.d/'+APP_NAME,'w') as f:
	f.write(init_conf)
os.system('chmod +x /etc/init.d/'+APP_NAME)

os.system('/etc/init.d/' + APP_NAME + ' restart')
	
print 'generating nginx server block'
with open('/etc/nginx/sites-available/'+APP_NAME,'w') as f:
	f.write(nginx_block)

os.system('mkdir /etc/nginx/logs/')
os.system('rm /etc/nginx/sites-enabled/%(app)s' % {'app':APP_NAME})
print('ln -s /etc/nginx/sites-available/%(app)s /etc/nginx/sites-enabled/%(app)s' % {'app':APP_NAME})
os.system('ln -s /etc/nginx/sites-available/%(app)s /etc/nginx/sites-enabled/%(app)s' % {'app':APP_NAME})

os.system('/etc/init.d/nginx reload && service nginx restart')

print "-"*30
print "To activate:"
print '/etc/init.d/' + APP_NAME + ' [start|stop|restart]'
print 'Currently running on ' + str(mainIP) + ':'+str(APP_PORT)
print "-"*30