用Python的Flask框架结合MySQL写一个内存监控程序

#!/usr/bin/env python
#coding=utf-8
import inspect
import time
import urllib, urllib2
import json
import socket
class mon:
 def __init__(self):
  self.data = {}
 def getTime(self):
  return str(int(time.time()) + 8 * 3600)
 def getHost(self):
  return socket.gethostname()
 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
  else:
   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.readline().split()[1])
    C = int(mem_open.readline().split()[1])
    return (F+B+C)/1024
  else:
   with open('/proc/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，用XXX作为key，getXXX()的返回值作为value，构造字典
  for fun in inspect.getmembers(self, predicate=inspect.ismethod):
   if fun[0][:3] == 'get':
    self.data[fun[0][3:]] = fun[1]()
  return self.data
if __name__ == "__main__":
 while True:
  m = mon()
  data = m.runAllGet()
  print data
  req = urllib2.Request("http://test.361way.com:8888", json.dumps(data), {'Content-Type': 'application/json'})
  f = urllib2.urlopen(req)
  response = f.read()
  print response
  f.close()
  time.sleep(60)

nohup python moniItems.py >/dev/null 2>&1 & 在被监控主机上运行，如果出于实验目的，想尽快的看到展示效果，可以将time.sleep(60) 改为time.sleep(2) ，这样每2秒就会取一次数据写入数据库。

访问 http://test.361way.com:8888 就可以看到我们的监控数据了：效果图如下

highcharts支持将按时间拖动，也支持按指定时间段查看。并且查看到的图片可以直接保存为png、jpg或pdf、csv等格式查看。