python 监测内存和cpu的使用率实例

我就废话不多说了，直接上代码吧！

import paramiko
import pymysql
import time

linux = ['192.168.0.179']
def connectHost(ip, uname='shenyuming', passwd='ajiongqqq'):
 ssh = paramiko.SSHClient()
 ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
 ssh.connect(ip, username=uname, password=passwd,port=22)
 return ssh
def MainCheck():
 try:
   while True:
     time.sleep(1)
     for a in range(len(linux)):
       ssh = connectHost(linux[a])
       # 查询主机名称
       cmd = 'hostname'
       stdin, stdout, stderr = ssh.exec_command(cmd)
       host_name = stdout.readlines()
       host_name = host_name[0]
       # 查看当前时间
       csj = 'date +％T'
       stdin, stdout, stderr = ssh.exec_command(csj)
       curr_time = stdout.readlines()
       curr_time = curr_time[0]

# 查看cpu使用率，并将信息写入到数据库中(取三次平均值)
       cpu = "vmstat 1 3|sed '1d'|sed '1d'|awk '{print $15}'"
       stdin, stdout, stderr = ssh.exec_command(cpu)
       cpu = stdout.readlines()
       cpu_usage = str(round((100 - (int(cpu[0]) + int(cpu[1]) + int(cpu[2])) / 3), 2)) + '％'

# 查看内存使用率，并将信息写入到数据库中

mem = "cat /proc/meminfo|sed -n '1,4p'|awk '{print $2}'"
       stdin, stdout, stderr = ssh.exec_command(mem)
       mem = stdout.readlines()
       mem_total = round(int(mem[0]) / 1024)
       mem_total_free = round(int(mem[1]) / 1024) + round(int(mem[2]) / 1024) + round(int(mem[3]) / 1024)
       mem_usage = str(round(((mem_total - mem_total_free) / mem_total) * 100, 2)) + "％"

sql = "insert into memory_and_cpu values('％s','％s','％s','％s')" ％ (
       host_name, curr_time, cpu_usage, mem_usage)
       db = connectDB()
       sqlDML(sql, db)
 except:
   print("连接服务器 ％s 异常" ％ (linux[a]))

def connectDB(dbname='test11'):
 if dbname == 'test11':
   db = pymysql.connect("localhost", "root", "shen123", "test11")
   return db
def sqlDML(sql, db):
 cr = db.cursor()
 cr.execute(sql)
 db.commit()
 cr.close()

#
if __name__ == '__main__':

MainCheck()

来源：https://blog.csdn.net/weixin_41896508/article/details/80859128