我正在编写一些 python 代码来登录到包含虚拟应用程序 (VTA) 的白盒设备。将安装两个不同的 VTA，代码将登录到物理设备，然后使用 virsh 控制台（VTA 的名称）登录到 VTA。
我遇到的问题是退出一个 VTA，然后 virsh 控制台进入另一个。exit 命令只是让我再次进入登录提示，但不会退出控制台连接。
为此，我必须发送一个“control + ]”才能跳出控制台。我一直在网上搜索以尝试找到解决方案，但我发现的唯一选择是发送并“退出”，然后是“\x1b”。但是，这实际上并没有跳出控制台窗口。相反，它结束了我不想要的会话。
有没有办法在 python 中发送“Control + ]”？
以下是一些显示步骤的代码：
from paramiko import SSHClient, AutoAddPolicy
import time
import re
import os
import sys
import progressbar
import stat
def create_connection(host):
username = ''
password = ''
port = 22
connection_info = {
'port': port,
'username': username,
'password': password
}
client = SSHClient()
client.set_missing_host_key_policy(AutoAddPolicy())
client.connect(host, timeout=10, auth_timeout=10, **connection_info)
ssh_session = client.invoke_shell()
ssh_session.settimeout(10.0)
return ssh_session
def send_commands(ssh_session, commands, sleep_time=1):
for command in commands:
ssh_session.send(command)
time.sleep(sleep_time)
output = ssh_session.recv(1048576)
decoded_output = output.decode()
return decoded_output
console_commands = [
'virsh console vw-vta\n',
'\n',
'\n', # Place the username of the VTA here
'\n' # Place the password of the VTA here
]
show_mgmt_commands = [
'ifconfig ens2 | grep Bcast\n'
]
exit_console = [
'exit\n'
'\x1b'
]
validate_commands = [
'virsh list\n'
]
def validation():
host = input('What is the IP address? ')
print('\n')
print(f'\033[1;33m--< Checking {host} for a valid VTA >------------\033[0m')
try:
ssh_session = create_connection(host)
except Exception as l:
print(f"\033[1;31mCannot connect to {host}!\033[0m")
return
validate = send_commands(ssh_session, validate_commands)
if 'y1564' in validate:
print(f"\033[1;32mThere is a Y1564 VTA running! Obtaining information...\033[0m")
ssh_session = create_connection(host)
console = send_commands(ssh_session, console_commands)
try:
show_mgmt = send_commands(ssh_session, show_mgmt_commands, sleep_time=2)
except Exception as e:
print(f"\033[1;31mCouldn't reach the console on " f"\033[1;33m{host}\033[0m"f"\033[1;31m. This VTA will need to be rebuilt.\033[0m")
if 'Login incorrect' in show_mgmt:
print(f"\033[1;31m--< Begin ERROR MESSAGE >------------\033[0m")
print(show_mgmt)
print(f"\033[1;31m--< End ERROR MESSAGE >------------\033[0m")
print(f"\033[1;31mThis VTA has the incorrect password!\033[0m")
print(f'{host},VTA Password Error', file=f)
exit = send_commands(ssh_session, exit_console)
return
else:
try:
mgmt = show_mgmt.split('addr:')[1].split(" ")[0]
except Exception as g:
print(f"\033[1;31mThis VTA is corrupt and will need to be rebuilt!\033[0m")
exit = send_commands(ssh_session, exit_console)
return
print("Y1564 VTA IP: ", mgmt)
exit = send_commands(ssh_session, exit_console)
else:
print("\033[1;33mThere is NOT a Y1564 VTA running on \033[0m"f"\033[1;34m {host}\033[0m")
ssh_session.close()
if __name__ == '__main__':
full_check()
当这个函数完成时，代码的第二部分调用一个类似的函数。但是它失败了，因为之前的函数没有断开控制台连接。当代码仍在前一个 VTA 中时，它会尝试为下一个函数发送命令。
这是一个显示它在做什么的输出：
What is the IP address? 1.1.1.1
--< Checking 1.1.1.1 for a valid VTA >------------
There is a Y1564 VTA running! Obtaining information...
Y1564 VTA IP: 10.10.10.10
exit
logout
--< Checking 1.1.1.1 for a valid VTA >------------
Ubuntu 16.04.6 LTS y1564 ttyS0
y1564 login:
virsh list
Password:
There is NOT a VTA running on 1.1.1.1
上面的输出表明，当 exit 命令运行并后跟 \x1b 时，它没有正确退出，而是尝试从下一部分发送“virsh list”命令。