Python:远程服务器宕机后自动重新连接ssh隧道

import paramiko
import time

def reconnect_ssh_tunnel(hostname, username, password, ssh_port, remote_port, local_port):
    while True:
        try:
            # 创建SSH客户端对象
            client = paramiko.SSHClient()
            # 自动添加远程主机的SSH密钥
            client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
            # 连接远程服务器
            client.connect(hostname, port=ssh_port, username=username, password=password)
            
            # 检查SSH隧道是否仍然有效
            transport = client.get_transport()
            if transport is None or not transport.is_active():
                # 如果SSH隧道无效，则重新建立SSH隧道
                transport = client.get_transport()
                channel = transport.open_channel("forwarded-tcpip", dest_addr=(hostname, remote_port), src_addr=("", local_port))
                print("重新建立SSH隧道成功")
            
            # 保持SSH连接，防止自动断开
            while True:
                time.sleep(60)
            
        except paramiko.AuthenticationException:
            print("SSH连接认证失败")
            break
        except paramiko.SSHException as e:
            print("SSH连接异常:", str(e))
            time.sleep(60)
        except Exception as e:
            print("其他异常:", str(e))
            break

# 示例用法
reconnect_ssh_tunnel("远程服务器IP", "用户名", "密码", 22, 8888, 9999)