python supervisor demo deployment

I did a demo about how to deploy other python apps served by a 'supervisord' daemon processor on github.

Here is the link. http://github.com/xros/supervisord_start_all

There are serveral torando apps there.

Here's a brife introduction of one of the tornado apps.

demo.py

would look like this:

#!/usr/bin/env python
#coding=utf-8
# 从2014年4月2日开始维护
"""主要用于测试supervisord 的内容

"""
import uuid
import hashlib
import json
import base64
import torndb
import MySQLdb
import tornado.ioloop
import tornado.web
import tornado.httpserver
from tornado.options import define, options
# This is vital for JSON dumps the method: __default
from datetime import date, datetime, timedelta
import logging

# define 完成后，同时生成一个options里面的属性，在下面方便 torndb.Connection
define("port", default=8000, help="run on the given port", type=int)
define("mysql_host", default="127.0.0.1:3306", help="database host")
define("mysql_database", default="mysql", help="database name")
define("mysql_user", default="root", help="database user")
define("mysql_password", default="", help="database password")
define("secret", default="secret_pass", help="secret key")

db = torndb.Connection(
        host=options.mysql_host, database=options.mysql_database,
        user=options.mysql_user, password=options.mysql_password,time_zone="+8:00")

def get_token():
    """
    Generate a hash that can be used as an application secret
    """
    hash = hashlib.sha1(str(uuid.uuid1()))
    hash.update(options.secret)
    return hash.hexdigest()

def __default(obj):
    if isinstance(obj, datetime):
        return obj.strftime('%Y-%m-%d %H:%M:%S')
    elif isinstance(obj, date):
        return obj.strftime('%Y-%m-%d')
    else:
        raise TypeError('%r is not JSON serializable' % obj)

def json_dumps(s):
    """

    """
    return json.dumps(s,ensure_ascii=False,default=__default)

def get_now():
    # 得到现在的时间，例如：
    # '2013-12-31 12:29:54'
    # 上海在东八区
    #local_time = datetime.now() + timedelta(hours=8)
    local_time = datetime.now()
    ISOTIMEFORMAT = '%Y-%m-%d %X'
    return local_time.strftime(ISOTIMEFORMAT)

class BaseHandler(tornado.web.RequestHandler):
    # set the header for json
    def initialize(self):
        self.set_header("Content-Type", "application/json; charset=UTF-8")
    @property
    def db(self):
        if not hasattr(self, "_db"):
            self._db = torndb.Connection(
                        host=options.mysql_host, database=options.mysql_database,
                        user=options.mysql_user, password=options.mysql_password,time_zone="+8:00")
        return self._db
    def write_error(self, status_code, **kwargs):
        if status_code==500:
            ret = {"ret":"","msg":u"系统出错！！"}
            self.write(json_dumps(ret))
            return
        else:
            super(BaseHandler, self).write_error(status_code, **kwargs)

class TestPage1Handler(BaseHandler):
    def get(self, *args, **kwargs):
        ret = {'msg':'', 'ret':""}
        try:
            sql1 = "SELECT User FROM user WHERE Host='127.0.0.1'"
            db_username = self.db.get(sql1)
        except Exception as e:
            ret = {'msg':'Database error', 'ret':""}
            self.write(json_dumps(ret))
            return
        else:
            ret['result'] = {"test":"okay"}
            ret['result'].update({'db_username': db_username['User']})
            logging.info('A request to test page 1')
        self.write(json_dumps(ret))
        return

class TestPage2Handler(BaseHandler):
    def get(self, *args, **kwargs):
        ret = {'msg':'', 'ret':""}
        logging.info('A request to test page 2')
        self.write(json_dumps(ret))
        return

class Application(tornado.web.Application):
    def __init__(self):
        handlers = [
            # 测试 torndb 效率
            (r"/testpage1", TestPage1Handler),                           # 测试
            (r"/testpage2", TestPage2Handler),                           # 测试

            #(r"/update/dealer/profile", UpdateProfileHandler)
            #(r"")
        ]

        settings = dict(
            cookie_secret="__TODO:_GENERATE_YOUR_OWN_RANDOM_VALUE_HERE__",
            debug=True,
        )
        tornado.web.Application.__init__(self, handlers, **settings)

def main():
    tornado.options.parse_command_line()
    http_server = tornado.httpserver.HTTPServer(Application(),no_keep_alive=True)
    http_server.listen(options.port)
    tornado.ioloop.IOLoop.instance().start()

if __name__ == "__main__":
    main()

About how to start those apps.

Just need this:

1) download the demo package to '/var/opt'

2) run '$ sudo ./start_daemon.sh

[ Notice ] The file 'daemon.conf' which contains many things about those apps' setting options should be edited every time new apps are added.

For more information, please go to visit http://github.com/xros/supervisord_start_all