【Python运维脚本】Python监控CPU情况

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#!/usr/bin/env python# -*- coding=utf-8 -*-#Using GPL v2.7#Author: leexide@126.com#Python监控CPU情况"""1、实现原理：通过SNMP协议获取系统信息，再进行相应的计算和格式化，最后输出结果2、特别注意：被监控的机器上需要支持snmp。yum install -y net-snmp*安装"""#!/usr/bin/pythonimport osdef getAllitems(host, oid):        sn1 = os.popen('snmpwalk -v 2c -c public ' + host + ' ' + oid + '|grep Raw|grep Cpu|grep -v Kernel').read().split('\n')[:-1]        return sn1                                                                def getDate(host):        items = getAllitems(host, '.1.3.6.1.4.1.2021.11')                                                                        date = []        rate = []        cpu_total = 0        #us = us+ni, sy = sy + irq + sirq        for item in items:                float_item = float(item.split(' ')[3])                cpu_total += float_item                if item == items[0]:                        date.append(float(item.split(' ')[3]) + float(items[1].split(' ')[3]))                elif item == item[2]:                        date.append(float(item.split(' ')[3] + items[5].split(' ')[3] + items[6].split(' ')[3]))                else:                        date.append(float_item)                                                                        #calculate cpu usage percentage        for item in date:                rate.append((item/cpu_total)*100)                                                                        mean = ['%us','%ni','%sy','%id','%wa','%cpu_irq','%cpu_sIRQ']                                                                        #calculate cpu usage percentage        result = map(None,rate,mean)        return result                                                                if __name__ == '__main__':        hosts = ['192.168.10.1','192.168.10.2']        for host in hosts:                print '==========' + host + '=========='                result = getDate(host)                print 'Cpu(s)',                #print result                for i in range(5):                        print ' %.2f%s' % (result[i][0],result[i][1]),                print                print
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