A simple monitoring system written by Python

There are many open-source monitoring systems on the market: Cacti, Nagios, Zabbix. Don't feel like I need to, why not do it yourself

Two hours with Python hand-off a simple monitoring system, to share with you, I hope to be able to inspire you

First Database Build table

Create a database "Falcon" with the following statement:

CREATE TABLE ' stat ' (' id ' int (one) unsigned not NULL auto_increment, ' host ' varchar () DEFAULT NULL, ' mem_free ' int (11) Default NULL, ' Mem_usage ' int (one) default null, ' Mem_total ' int (one) default null, ' LOAD_AVG ' varchar (+) default NULL, ' t IME ' bigint (one) default NULL, PRIMARY key (' ID '), key ' host ' (' Host ' (255))) Engine=innodb auto_increment=0 default CHARSET =utf8;

First we design a Web service that implements the following functions:

1. Complete the Monitoring page display
2. Accept post-submitted data
3. Provide JSON data get interface

The directory structure is as follows:

Web├──flask_web.py└──templates└──mon.html[/code]flask_web.py[code]import mysqldb as Mysqlimport jsonfrom flask Impor T Flask, request, Render_templateapp = Flask (__name__) db = Mysql.connect (user= "reboot", passwd= "reboot123", \ db= "Falco n ", charset=" UTF8 ") Db.autocommit (True) c = db.cursor () @app. Route ("/", methods=[" GET "," POST "]) def hello (): sql =" "if re Quest.method = = "POST": data = Request.json Try:sql = "INSERT into ' stat ' (' Host ', ' Mem_free ', ' mem_usage ', ' mem_ Total ', ' load_avg ', ' time ') VALUES ('%s ', '%d ', '%d ', '%d ', '%s ', '%d ') "% (data[' Host '], data[' Memfree '], data[' memusage ') , data[' Memtotal '], data[' loadavg '], int (data[' time '))) ret = c.execute (sql) except MySQL. Integrityerror:pass return "OK" Else:return render_template ("mon.html") @app. Route ("/data", methods=["GET"]) d EF GetData (): C.execute ("Select ' Time ', ' mem_usage ' from ' stat '") ones = [[i[0]*1000, i[1]] for i in C.fetchall ()] Retur N "%s" (%s); "% (Request.args.get (' callback '), JSON.DUmps (ones)) if __name__ = = "__main__": App.run (host= "0.0.0.0", port=8888, Debug=true) 

This template page is an example of the Highstock I copied, mon.html

For the sake of simplicity, we only show mem_usage information on the page.

Jb51.net      
 
      Highstock Example                  

The Web presentation page is complete and running:

Python flask_web.py listening on port 8888

We need to make an agent to collect the data and upload the database

moniitems.py

#!/usr/bin/env pythonimport inspectimport timeimport urllib, urllib2import jsonimport socketclass mon:def __init__ (self ): Self.data = {} def getTime (self): return str (int. (Time.time ()) + 8 * 3600) def gethost (self): return SOCKET.G      Ethostname () def getloadavg (self): with open ('/proc/loadavg ') as Load_open:a = Load_open.read (). Split () [: 3] Return ', '. Join (a) def getmemtotal (self): with open ('/proc/meminfo ') as mem_open:a = Int (Mem_open.readline (). Split () [1]) return a/1024 def getmemusage (self, nobuffercache=true): If Nobuffercache:with open ('/proc/        Meminfo ') as Mem_open:t = Int (Mem_open.readline (). Split () [1]) F = Int (Mem_open.readline (). Split () [1]) B = Int (Mem_open.readline (). Split () [1]) C = Int (Mem_open.readline (). Split () [1]) return (T-F-B-C)/1024 E Lse:with open ('/proc/meminfo ') as mem_open:a = Int (Mem_open.readline (). Split () [1])-Int (Mem_open.readline () . Split () [1]) return a/1024 def getmemfree (self, nobuffercache=true): If Nobuffercache:with open ('/proc/meminfo ') as Mem_open: T = Int (Mem_open.readline (). Split () [1]) F = Int (Mem_open.readline (). Split () [1]) B = Int (mem_open.read Line (). Split () [1]) C = Int (Mem_open.readline (). Split () [1]) return (f+b+c)/1024 Else:with open ('/pro    C/meminfo ') as Mem_open:mem_open.readline () a = Int (Mem_open.readline (). Split () [1]) return a/1024  def runallget (self): #自动获取mon类里的所有getXXX方法, with the return value of XXX as key,getxxx () as value, constructs the dictionary for fun in Inspect.getmembers (self, Predicate=inspect.ismethod): if fun[0][:3] = = ' Get ': self.data[fun[0][3:]] = fun[1] () return Self.dataif _ _name__ = = "__main__": While true:m = Mon () data = M.runallget () print data req = Urllib2. Request ("http://jb51.net:8888", Json.dumps (data), {' Content-type ': ' Application/json '}) F = Urllib2.urlopen (req) Res Ponse = F.read () print response f.clOSE () time.sleep nohup python moniitems.py >/dev/null 2>&1 & Running Up 

Visit http://jb51.net:8888 to see our monitoring data: the following

