近期研究nagios，特意写了检测cpu负载的python脚本（有借鉴网上资料），顺道练练python脚本，以下采用2种方法获取cpu负载。
1、读取cpu负载文件：
#!/usr/bin/env python
#-*- coding:utf-8 -*-
'''cpu负载检测 for nagios'''
import sys
def check_load():
loadf=open('/proc/loadavg','r')
allavg=loadf.readline()
load5avg=float(allavg.split()[0])
load10avg=float(allavg.split()[1])
load15avg=float(allavg.split()[2])
loadf.close()
print load5avg
n=0
cpunf=open('/proc/cpuinfo','r')
for i in cpunf.readlines():
if i.split(':')[0].strip() == 'processor':
n+=1
cpunf.close()
if load5avg > n:
print "critical - load average:%.2f,%.2f,%.2f" %(load5avg,load10avg,load15avg)
sys.exit(2)
else:
print "OK - load average:%.2f,%.2f,%.2f" %(load5avg,load10avg,load15avg)
sys.exit(0)
if __name__ == '__main__':
check_load()
2、调用python的os模块获取cpu负载：
#!/usr/bin/env python
#-*- coding:utf-8 -*-
'''cpu负载检测 for nagios'''
import os,sys
def check_load():
(d1,d2,d3)=os.getloadavg()
print d1
n=0
cpunf=open('/proc/cpuinfo','r')
for i in cpunf.readlines():
if i.split(':')[0].strip() == 'processor':
n+=1
cpunf.close()
if d1 > n:
print "critical - load average:%.2f,%.2f,%.2f" %(d1,d2,d3)
sys.exit(2)
else:
print "OK - load average:%.2f,%.2f,%.2f" %(d1,d2,d3)
sys.exit(0)
if __name__ == '__main__':
check_load()
备注：2种方法效果一样，脚本很简单，有好方法的大神，开源出来，互相学习！
