在自動化測試場景里, 有時需要在代碼里獲取遠(yuǎn)程服務(wù)器的某些數(shù)據(jù), 或執(zhí)行一些查詢命令,如獲取Linux系統(tǒng)版本號 獲取CPU及內(nèi)存的占用等, 本章記錄一下使用paramiko模塊SSH連接服務(wù)器的方法

pip3 install paramiko2. 代碼

#!/usr/bin/env python# coding=utf-8'''# :author: Terry Li# :url: https://blog.csdn.net/qq_42183962# :copyright: © 2020-present Terry Li# :motto: I believe that the God rewards the diligent.'''import paramikoclass cfg:host = '192.168.2.2'user = 'root'password = '123456'class sshChannel:def __init__(self, cfg_obj, timeout_s=5, port=22):self._cfg = cfg_objself.ssh_connect_timeout = timeout_sself.port = portself.ssh = self.connect_server()def connect_server(self):ssh_cli = paramiko.SSHClient()key = paramiko.AutoAddPolicy()ssh_cli.set_missing_host_key_policy(key)try:ssh_cli.connect(self._cfg.host, port=self.port, username=self._cfg.user, password=self._cfg.password,timeout=self.ssh_connect_timeout)except paramiko.ssh_exception.SSHException:print('連接{}失敗, 請檢查配置或重試'.format(self._cfg.host))ssh_cli.close()return ssh_clidef execute_cmd(self, cmd):''':param cmd: 單個命令:return: 服務(wù)器的輸出信息'''stdin, stdout, stderr = self.ssh.exec_command(cmd)self.ssh.close()return stdout.read().decode(’utf-8’)def execute_cmd_list(self, cmd_list):''':param cmd: 命令列表:return: 服務(wù)器的輸出信息的列表'''out_list = list(map(self.execute_cmd, cmd_list))return out_listdef test_get_sys_version(self):sys_version = self.execute_cmd('lsb_release -rd')print(sys_version)def test_get_sys_disk_free_and_memory_free(self):sys_info = self.execute_cmd_list(['df -h -BG /', 'free -m'])print(sys_info)if __name__ == ’__main__’:server = sshChannel(cfg)server.test_get_sys_version()server.test_get_sys_disk_free_and_memory_free()

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