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xmz7891
f4a146056f
用户早上撞上 Cloudflare Error 1033。查出来是设备**掉电重启**：
上次开机到重启之间没有任何日志落盘（直接断电的特征），
dmesg 里还有 "l13: voltage operation not allowed"。
重启本身不是软件问题，但**恢复太慢**：
Startup finished in 3.846s (kernel) + 2min 6.358s (userspace) = 2分10秒
那 2 分钟里浏览器看到的就是 1033。
根因：
这台机器 NetworkManager 和 systemd-networkd 同时在跑，
但 wlan0 归 NetworkManager 管。
NetworkManager-wait-online -> 开机 9 秒成功
systemd-networkd-wait-online -> 等一个不归它管的网络，
干等 2 分钟超时，然后 failed
network-online.target 要等**两个都完成**，
被那个失败的拖了整整 2 分钟，
relay / tunnel / net-tune 全跟着等。
修法：
1. mask 掉 systemd-networkd-wait-online（网络不归它管，只会拖后腿）
2. watchdog 首次检查从"开机后 2 分钟"提前到 45 秒
实测（重启验证过）：
修之前 Startup finished in 3.846s + 2min 6.358s = 2分10秒
修之后 Startup finished in 3.218s + 14.060s = 17.3秒
掉电重启后公网恢复时间：**24 秒**（快了 5 倍多）
配套加了 scripts/speed-up-boot.sh，换设备时直接跑一遍。
顺带确认重启后一切自动恢复：
三个服务 active + enabled ✓
keepalive 30/10/3、MTU 探测、MSS 钳制、slow_start=0 全部持久化 ✓
隧道 4 条连接 http2 ✓
官网 / 管理页 / 截图全部 200 ✓
96 lines
3.0 KiB
Python
96 lines
3.0 KiB
Python
# -*- coding: utf-8 -*-
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"""随身 WiFi（Debian）远程执行小工具。
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用法：
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python _build/devssh.py "命令" # 跑一条命令
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python _build/devssh.py --script 文件 # 跑一段脚本
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"""
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from __future__ import annotations
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import sys
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import time
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from pathlib import Path
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import paramiko
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# 随身 WiFi（Debian）的地址。
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#
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# 这台设备跟着教室网络走，地址会变：
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# 192.168.2.156 -> 192.168.10.105（换网络了）
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# 所以优先读环境变量 YKXMZ_DEV_HOST，没有才用下面的默认值。
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# 换网络时不用改代码：
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# $env:YKXMZ_DEV_HOST = "192.168.10.105"
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import os
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HOST = os.environ.get("YKXMZ_DEV_HOST", "192.168.10.105")
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USER = "root"
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PASSWORD = os.environ.get("YKXMZ_DEV_PASS", "1313144")
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# 旧地址留一份，方便回退或同时探测
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HOST_FALLBACKS = ("192.168.10.105", "192.168.2.156")
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def run(command: str, timeout: int = 600, quiet: bool = False) -> tuple:
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client = paramiko.SSHClient()
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client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
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client.connect(HOST, username=USER, password=PASSWORD, timeout=15,
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banner_timeout=20, auth_timeout=20,
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look_for_keys=False, allow_agent=False)
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try:
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_stdin, stdout, stderr = client.exec_command(command, timeout=timeout)
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out = stdout.read().decode("utf-8", "replace")
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err = stderr.read().decode("utf-8", "replace")
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code = stdout.channel.recv_exit_status()
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if not quiet:
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if out.strip():
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print(out.rstrip())
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if err.strip():
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print("[stderr] " + err.rstrip())
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return code, out, err
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finally:
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client.close()
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def upload(local: str, remote: str, mode: int = 0o644) -> None:
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client = paramiko.SSHClient()
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client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
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client.connect(HOST, username=USER, password=PASSWORD, timeout=15,
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look_for_keys=False, allow_agent=False)
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try:
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sftp = client.open_sftp()
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sftp.put(local, remote)
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sftp.chmod(remote, mode)
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sftp.close()
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print(f" 已上传 {Path(local).name} -> {remote}")
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finally:
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client.close()
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def download(remote: str, local: str) -> None:
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client = paramiko.SSHClient()
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client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
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client.connect(HOST, username=USER, password=PASSWORD, timeout=15,
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look_for_keys=False, allow_agent=False)
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try:
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sftp = client.open_sftp()
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sftp.get(remote, local)
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sftp.close()
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print(f" 已下载 {remote} -> {local}")
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finally:
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client.close()
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if __name__ == "__main__":
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if len(sys.argv) < 2:
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print(__doc__)
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sys.exit(1)
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if sys.argv[1] == "--script":
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run(Path(sys.argv[2]).read_text(encoding="utf-8"), timeout=600)
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else:
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args = sys.argv[1:]
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timeout = 600
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if args and args[0] == '--timeout':
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timeout = int(args[1])
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args = args[2:]
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run(" ".join(args), timeout=timeout)
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