python執行shell獲取硬件參數寫入mysql的方法

2019-11-25 18:03:00

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本文實例講述了python執行shell獲取硬件參數寫入mysql的方法。分享給大家供大家參考。具體分析如下：

最近要獲取服務器各種參數，包括cpu、內存、磁盤、型號等信息。試用了Hyperic HQ、Nagios和Snmp，它們功能都挺強大的，但是于需求不是太符，亦或者太heavy。

于是乎想到用python執行shell獲取這些信息，python執行shell腳本有以下三種方法：

1. os.system()

復制代碼代碼如下:

os.system('ls')
#返回結果0或者1，不能得到命令的輸出

2. os.popen()

復制代碼代碼如下:

output = os.popen('ls')
print output.read()
#打印出的是命令輸出，但是得不到執行的返回值

3. commands.getstatusoutput()

復制代碼代碼如下:

(status, output) = commands.getstatusoutput('ls')
print status, output
#打印出返回值和命令輸出

可以根據需要選取其中一種方法，以下是python執行shell獲取硬件參數寫入mysql，并定期更新的程序：

復制代碼代碼如下:

'''
Created on Dec 10, 2014

@author: liufei
'''
#coding=utf-8
import time, sched, os, string
from datetime import datetime
import MySQLdb

s = sched.scheduler(time.time,time.sleep)

def event_func():
    try:
        #主機名
        name = os.popen(""" hostname """).read()
        #cpu數目
        cpu_num = os.popen(""" cat /proc/cpuinfo | grep processor | wc -l """).read()
        #內存大小
        mem = os.popen(""" free | grep Mem | awk '{print $2}' """).read()
        #機器品牌
        brand = os.popen(""" dmidecode | grep 'Vendor' | head -1 | awk -F: '{print $2}' """).read()
        #型號
        model = os.popen(""" dmidecode | grep 'Product Name' | head -1 | awk -F: '{print $2}' """).read()
        #磁盤大小
        storage = os.popen(""" fdisk -l | grep 'Disk /dev/sd' | awk 'BEGIN{sum=0}{sum=sum+$3}END{print sum}' """).read()
        #mac地址
        mac = os.popen(""" ifconfig -a | grep HWaddr | head -1 | awk '{print $5}' """).read()

        name = name.replace("/n","").lstrip()
        cpu_num = cpu_num.replace("/n","").lstrip()
        memory_gb = round(string.atof(mem.replace("/n","").lstrip())/1000.0/1000.0, 1)
        brand = brand.replace("/n","").lstrip()
        model = model.replace("/n","").lstrip()
        storage_gb = storage.replace("/n","").lstrip()
        mac = mac.replace("/n","").lstrip()

        print name
        print cpu_num
        print memory_gb
        print storage_gb
        print brand
        print model
        print mac

        conn=MySQLdb.connect(host='xx.xx.xx.xx',user='USERNAME',passwd='PASSWORD',db='DBNAME',port=3306)
        cur=conn.cursor()
        cur.execute('select mac from servers where mac=%s',mac)
        data = cur.fetchone()

        if data is None:
            value = [name, brand, model, memory_gb, storage_gb, cpu_num, mac, datetime.now(), datetime.now()]
            cur.execute("insert into servers(name, brand, model, memory_gb, storage_gb, cpu_num, mac, created_at, updated_at) values(%s, %s, %s, %s, %s, %s, %s, %s, %s)",value)
        else:
            value1 = [name, brand, model, memory_gb, storage_gb, cpu_num, datetime.now(), mac]
            cur.execute("update servers set name=%s,brand=%s,model=%s,memory_gb=%s,storage_gb=%s,cpu_num=%s, updated_at=%s where mac=%s",value1)

        conn.commit()
        cur.close()
        conn.close()

    except MySQLdb.Error,e:
        print "Mysql Error %d: %s" % (e.args[0], e.args[1])

def perform(inc):
    s.enter(inc,0,perform,(inc,))
    event_func()

def mymain(inc=10):
    s.enter(0,0,perform,(inc,))
    s.run()

if __name__ == "__main__":
    mymain()