Python + Pexpect远程监控服务器

导言：性能测试少不了监控服务器一些性能指标，上一家公司运维部已经用zabbix进行了监控，在性能测试时，直接去查看就好，python大屌丝也能监控呀

Python的Pexpect详解：http://blog.csdn.net/sdustliyang/article/details/23373485

闲来无聊玩了下：

# -*- coding:utf-8 -*-import pexpectimport reimport timeimport threading# 主方法def ssh_command(user, host, password, command):    ssh_new_key = 'Are you sure you want to continue connecting'    child = pexpect.spawn('ssh -l %s %s %s' % (user, host, command))    i = child.expect([pexpect.TIMEOUT, ssh_new_key, 'password: '])    if i == 0:        print 'ERROR!'        print 'SSH could not login. Here is what SSH said:'        print child.before, child.after        return None    if i == 1:        child.sendline('yes')        child.expect('password: ')        i = child.expect([pexpect.TIMEOUT, 'password: '])        if i == 0:            print 'ERROR!'            print 'SSH could not login. Here is what SSH said:'            print child.before, child.after            return None    child.sendline(password)    return child# memdef mem_info():    print time.strftime("%Y-%m-%d %H:%M:%S", time.localtime())    child = ssh_command("root", "120.24.239.214", "******", "cat /proc/meminfo")    child.expect(pexpect.EOF)    mem = child.before    mem_values = re.findall("(\d+)\ kB", mem)    MemTotal = mem_values[0]    MemFree = mem_values[1]    Buffers = mem_values[2]    Cached = mem_values[3]    SwapTotal = mem_values[13]    SwapFree = mem_values[14]    if int(SwapTotal) == 0:        print u"交换内存总共为：0"    else:        Rate_Swap = 100 - 100*int(SwapFree)/float(SwapTotal)        print u"交换内存利用率：", Rate_Swap    Free_Mem = int(MemFree) + int(Buffers) + int(Cached)    Used_Mem = int(MemTotal) - Free_Mem    Rate_Mem = 100*Used_Mem/float(MemTotal)    print u"内存利用率：", str("%.2f" % Rate_Mem), "%"# iodef vm_stat_info():    print time.strftime("%Y-%m-%d %H:%M:%S", time.localtime())    child = ssh_command("root", "120.24.239.214", "******", "vmstat 1 2 | tail -n 1")    child.expect(pexpect.EOF)    vmstat_info = child.before.strip().split()    processes_waiting = vmstat_info[0]    processes_sleep = vmstat_info[1]    io_bi = vmstat_info[8]    io_bo = vmstat_info[9]    system_interrupt = vmstat_info[10]    system_context_switch = vmstat_info[11]    cpu_user = vmstat_info[12]    cpu_sys = vmstat_info[13]    cpu_idle = vmstat_info[14]    cpu_wait = vmstat_info[15]    print "processes_waiting:", processes_waiting    print "processes_sleep:", processes_sleep    print "io_bi:", io_bi    print "io_bo:", io_bo    print "system_interrupt:", system_interrupt    print "system_context_switch:", system_context_switch    print "cpu_user:", cpu_user    print "cpu_sys:", cpu_sys    print "cpu_idle:", cpu_idle    print "cpu_wait:", cpu_wait# cpudef cpu_info():    print time.strftime("%Y-%m-%d %H:%M:%S", time.localtime())    child = ssh_command("root", "120.24.239.214", "******", "cat /proc/cpuinfo")    child.expect(pexpect.EOF)    cpuinfo = child.before    cpu_num = re.findall('processor.*?(\d+)', cpuinfo)[-1]    cpu_num = str(int(cpu_num) + 1)    print u"CPU数目：", cpu_numif __name__ == '__main__':    try:        threads = []        t1 = threading.Thread(target=mem_info)        threads.append(t1)        t2 = threading.Thread(target=vm_stat_info)        threads.append(t2)        t3 = threading.Thread(target=cpu_info)        threads.append(t3)        for n in range(len(threads)):            threads[n].start()    except Exception, e:        print str(e)

总结：

pexpect + django应该可以做一个监控网站，类似zabbix一样

本人利用Bootstrap + EasyUI + Django开发网站：http://www.xuyangting.com/ 欢迎来访

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