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我正在尝试为多个设备运行以下脚本，并且根据以下脚本它仅适用于最后一个设备。

请您验证以下脚本，因为我需要使用 for 循环语句执行两个设备输出。

from netmiko import ConnectHandler 
from getpass import getpass

password= getpass()

RTR_01 = {

         'device_type': 'cisco_ios',
         'host': '10.10.10.10',
         'username': 'admin',
         'password': password,
}

RTR_02 = { 'device_type': 'cisco_ios', 
           'host': '10.10.10.11', 
           'username': 'admin', 
           'password': password, }

device_list = [RTR_01,RTR_02] 

for device in device_list: print('Connecting to the device :' + device ['host']) 

net_connect = ConnectHandler(**device)

output = net_connect.send_command('show ip interface brief')
print(output)
output = net_connect.send_command('show version')
print(output)
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2 回答 2

1

我现在如何 100% 正确工作。我尝试过net_connect.disconnect()使用适当的缩进，但它不起作用，因为一旦你退出循环的缩进，它就会自动退出。问题虽然很愚蠢，但我仍然连接到实际设备并且收到一个我忽略的错误，抱怨无法创建/var/home/myusername/.ssh

我需要做的就是在循环的最后发出以下命令：

net_connect.write_channel('exit\n')

例如愚蠢的错误和浪费了很多时间，但教训很有价值！也许它可以帮助这里的其他人。

于 2021-08-21T19:37:01.740 回答
0

您需要这些行在 for 循环中缩进

net_connect = ConnectHandler(**device)

output = net_connect.send_command('show ip interface brief')
print(output)
output = net_connect.send_command('show version')
print(output)

您的代码应如下所示：

from getpass import getpass

from netmiko import ConnectHandler

password = getpass()

RTR_01 = {
    "device_type": "cisco_ios",
    "host": "10.10.10.10",
    "username": "admin",
    "password": password,
}

RTR_02 = {
    "device_type": "cisco_ios",
    "host": "10.10.10.11",
    "username": "admin",
    "password": password,
}

device_list = [RTR_01, RTR_02]

for device in device_list:
    print("Connecting to the device :" + device["host"])

    net_connect = ConnectHandler(**device)

    output = net_connect.send_command("show ip interface brief")
    print(output)
    output = net_connect.send_command("show version")
    print(output)

    net_connect.disconnect() # to clear the vty line when done

这是你的代码的一个更好的版本，它做同样的事情：

from getpass import getpass

from netmiko import ConnectHandler

password = getpass()

ipaddrs = ["10.10.10.10", "10.10.10.11"]

# A list comprehension
devices = [
    {
        "device_type": "cisco_ios",
        "host": ip,
        "username": "admin",
        "password": password,
    }
    for ip in ipaddrs
]

for device in devices:
    print(f'Connecting to the device: {device["host"]}')

    with ConnectHandler(**device) as net_connect:  # Using Context Manager
        intf_brief = net_connect.send_command(
            "show ip interface brief"
        )  # Inside the connection
        facts = net_connect.send_command("show version")  # Inside the connection

        # Notice here I didn't call the `net_connect.disconnect()`
        # because the `with` statement automatically disconnects the session.

    # On this indentation level (4 spaces), the connection is terminated
    print(intf_brief)
    print(facts)

输出 (intf_brief和facts) 在连接外部打印，因为不再需要会话来打印任何收集的值。

于 2021-08-02T19:01:44.150 回答