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
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