python怎样利用paramiko执行服务器命令

@staticmethod
  def connect(ip, server_user, server_port, server_path):
    """
    连接服务器

    :param :
    :return:
    """
    ssh = paramiko.SSHClient()
    private_key = paramiko.RSAKey.from_private_key_file('{}.ssh/id_rsa'.format(server_path))
    ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
    try:
      ssh.connect(ip, port=server_port, username=server_user, pkey=private_key, timeout=5, allow_agent=True)
      return ssh
    except Exception as e:
      app.logger.info('connect_error info is {}'.format(e.__repr__()))

      return {
        'result': 1,
        'ip': ip,
        'msg': e.__repr__(),
      }

def fabric_run_cmd(self, ip, server_user, server_port, server_path, cmd):
    """
    批量在服务器执行命令

    :return:
    """
    conn = self.connect(ip, server_user, server_port, server_path)
    try:
      if type(conn) == dict:
        return conn
      else:
        stdin, stdout, stderr = conn.exec_command(cmd)
        app.logger.info('fabric_run_cmd_stdout info is {}'.format(stdout.readlines()))
        app.logger.info('fabric_run_cmd_stderr info is {}'.format(stderr.readlines()))
        channel = stdout.channel
        status = channel.recv_exit_status()
        conn.close()
        app.logger.info('fabric_run_cmd_status info is {}'.format(status))
        if status == 0:
          return {
            'ip': ip,
            'msg': '执行成功',
            'result': 0
          }
        else:
          return {
            'ip': ip,
            'msg': stderr.readlines(),
            'result': 1
          }
    except Exception as e:
      app.logger.info('fabric_run_cmd_error info is {}'.format(e.__repr__()))
      return {
        'ip': ip,
        'msg': e.__repr__(),
        'result': 1
      }

def fabric_put_file(self, ip, src_file, dst_file, server_user, server_port, server_path):
    """
    发送文件到服务器

    :return:
    """
    conn = self.connect(ip, server_user, server_port, server_path)
    if type(conn) == dict:
      return conn
    else:
      try:
        ftp = conn.open_sftp()
        ftp.put(dst_file, src_file) # 发送文件之前先判断有没有目标文件夹 如果没有现在服务器上创建文件夹
        ftp.close() # 在此判断文件是否发送成功
        return {
          'ip': ip,
          'msg': '上传成功',
          'result': 0
        }
      except Exception as e:
        app.logger.info('fabric_put_file_error info is {}'.format(e.__repr__()))
        return {
          'ip': ip,
          'msg': e.__repr__(),
          'result': 1
        }