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()

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