python--paramiko模块

paramiko模块提供了ssh及sft进行远程登录服务器执行命令和上传下载文件的功能。这是一个第三方的软件包，使用之前需要安装

paramiko远程密码连接

import paramiko

#创建一个ssh对象
client = paramiko.SSHClient()

client.set_missing_host_key_policy(paramiko.AutoAddPolicy)

#连接服务器
client.connect(
    hostname='172.25.254.36',
    username='root',
    password='redhat'

)

#执行操作
stdin, stdout, stderr = client.exec_command('hostname')

#获取命令的执行结果
print(stdout.read().decode('utf-8'))

#关闭连接
client.close()

批量远程密码连接

from paramiko.ssh_exception import NoValidConnectionsError, AuthenticationException
def connect(cmd, hostname, user, password):
    import paramiko
    # ssh [email protected]
    # 创建一个ssh对象;
    client = paramiko.SSHClient()
    # 2. 解决问题:如果之前没有；连接过的ip, 会出现
    # Are you sure you want to continue connecting (yes/no)? yes
    # 自动选择yes
    client.set_missing_host_key_policy(paramiko.AutoAddPolicy())

    try:
        # 3. 连接服务器
        client.connect(
            hostname=hostname,
            username=user,
            password=password
        )
    except NoValidConnectionsError as e:
        return  "主机%s连接失败" %(hostname)
    except AuthenticationException as e:
        return "主机%s密码错误" % (hostname)
except Exception as e:
    return  "未知错误: ", e
else:
    # 4. 执行操作
    stdin, stdout, stderr = client.exec_command('hostname')
    # 5. 获取命令的执行结果;
    res = stdout.read().decode('utf-8')
    # 6. 关闭连接
    client.close()

    return  res


if __name__ == '__main__':
    with open('doc/hosts.txt') as f:
        for line in f:
            # 172.25.254.1:root:westos
            hostname, username, password = line.split(":")
            res = connect('hostname', hostname, username, password )
            print(hostname.center(50, '*'))
            print("主机名:", res)

在文本中随便写入一些用户进行测试

paramiko基于公钥和私钥连接

目标:
1). 172.25.254.3 - host3
172.25.254.4 - host4
2). host4实现无密码连接host3？

 *****host3操作: 生成公钥和私钥， 并发送私钥给host4
          993  ssh-keygen
          994  cd  /root/.ssh/
          995  ls
          996  ssh-copy-id  -i  id_rsa.pub [email protected]
          997  scp id_rsa [email protected]:/home/kiosk/.ssh/


*****host4操作：
a). shell命令检测是否可以成功?
ssh [email protected]

b). 代码实现:
    import paramiko
    # ssh [email protected]
    # 创建一个ssh对象;
    client = paramiko.SSHClient()


    # 实例化一个私钥对象
    private_key = paramiko.RSAKey.from_private_key_file('/home/kiosk/.ssh/id_rsa')
    # 2. 解决问题:如果之前没有；连接过的ip, 会出现
    # Are you sure you want to continue connecting (yes/no)? yes
    # 自动选择yes
    client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
    # 3. 连接服务器
    client.connect(
        hostname='172.25.254.36',
        username='root',
        pkey= private_key ,

    )
    # 4. 执行操作
    stdin, stdout, stderr = client.exec_command('hostname')
    # 5. 获取命令的执行结果;
    print(stdout.read().decode('utf-8'))
    # 6. 关闭连接
    client.close()