通过paramiko模块在远程主机上执行命令

安装paramiko模块

/usr/local/python36/bin/pip3 install paramiko

1、获取cpu使用率

#!/usr/bin/python
#coding=utf8
#target: get the cpu's used of remote linux system

import paramiko

def getlinux(ssh):
    # get the result of executing command
    stdin, stdout, stderr = ssh.exec_command(r"sar 2 3|awk 'END{print (100-$NF)*100}'")
    # judge if there is any error
    err = stderr.readlines()
    if len(err) > 0:
        return err
    else:
        stdout_content = stdout.readlines()
    result = stdout_content
    if len(result) == 0:
        print("there is something wrong when executing sar command")
    else:
        return round(float(result[0].strip()),2)

if __name__ == '__main__':
    # create ssh object
    ssh = paramiko.SSHClient()
    # connect target host by ssh
    ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
    ssh.connect(hostname="192.168.223.136",port=22,username="root",password="redhat")
    # get the result of target host
    result = getlinux(ssh)
    # close ssh connection
    ssh.close()
    print(str(result)+"%s used")

2、获取内存使用率

#!/usr/bin/python
#coding=utf8
#target: get the memory's used of linux system

import paramiko

def getlinux(ssh):
    # executing command 
    stdin, stdout, stderr = ssh.exec_command(r"free -m|awk 'NR==2{print (($3 - $6 - $7)/$2)*100}'")
    err = stderr.readlines()
    if len(err) > 0:
        return err
    else:
        stdout_content = stdout.readlines()
    result = stdout_content
    if len(result) == 0:
        print("there is something wrong when executing free -m")
    else:
        return round(float(result[0].strip()),2)

if __name__ == '__main__':
    # create ssh object
    ssh = paramiko.SSHClient()
    # connect target host by ssh
    ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
    ssh.connect(hostname="192.168.223.136",port=22,username="root",password="redhat")
    result = getlinux(ssh)
    ssh.close()
    print(str(result)+"% used")

 3、获取磁盘使用率：

#!/usr/bin/python
#coding=utf8
#target: get the used of disk 

import paramiko

def getlinux(ssh):
    stdin, stdout, stderr = ssh.exec_command(r"df -h|awk 'NR > 1{if($1==$NF){print $1}else{print $0}}'")
    err = stderr.readlines()
    if len(err) > 0:
        return err
    else:
        stdout_content = stdout.readlines()
    result = stdout_content
    if len(result) == 0:
        print("there is something wrong when executing command")
    else:
        return result


if __name__ == '__main__':
    ssh = paramiko.SSHClient()
    ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
    ssh.connect(hostname="192.168.223.136",port=22,username="root",password="redhat")
    result = getlinux(ssh)
    ssh.close()
    for i in result:
        print("the used of %s has used %s" % (i.strip().split()[5],i.strip().split()[4]))