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需要帮助弄清楚 SystemD 定时器如何从挂起状态唤醒

tag-icon • tag-icon bash python suspend systemd
需要帮助弄清楚 SystemD 定时器如何从挂起状态唤醒

我有一个 systemd 服务文件和计时器文件，它们可以唤醒笔记本电脑并运行一个 python 脚本。然后，当这些完成后，运行一个 bash 脚本，将其重新置于挂起状态。它目前唤醒笔记本电脑，然后过一会儿挂起。不确定为什么它会给出这样的错误。当手动运行 python 脚本时，从命令行运行良好。包括计时器和服务的状态。

环境：

WXFORECAST_PUSHOVER_APP_KEY=randomAPPKey
WXFORECAST_COORDINATES=31.02,-90.56
PUSHOVER_DEVICE=weather
PUSHOVER_USER_KEY=randomGroupKey

状态服务

● wxforecast.service - Send Weather Update
   Loaded: loaded (/etc/systemd/system/wxforecast.service; static; vendor preset: enabled)
   Active: failed (Result: exit-code) since Fri 2020-05-29 07:00:24 CDT; 3h 56min ago
  Process: 31417 ExecStopPost=/bin/bash /usr/local/bin/sus.sh (code=exited, status=0/SUCCESS)
  Process: 31287 ExecStart=/usr/bin/python3 /home/william/CODE/wxforecast/wxforecast.py (code=exited, status=1/FAILURE)
 Main PID: 31287 (code=exited, status=1/FAILURE)

May 29 07:00:24 william python3[31287]:   File "/usr/local/lib/python3.6/dist-packages/requests/sessions.py", line 646, in send
May 29 07:00:24 william python3[31287]:     r = adapter.send(request, **kwargs)
May 29 07:00:24 william python3[31287]:   File "/usr/local/lib/python3.6/dist-packages/requests/adapters.py", line 516, in send
May 29 07:00:24 william python3[31287]:     raise ConnectionError(e, request=request)
May 29 07:00:24 william python3[31287]: requests.exceptions.ConnectionError: HTTPSConnectionPool(host='api.weather.gov', port=443): Max retries exceeded with url: /points/35.0
May 29 07:00:24 william systemd[1]: wxforecast.service: Main process exited, code=exited, status=1/FAILURE
May 29 07:00:24 william sudo[31424]:     root : TTY=unknown ; PWD=/ ; USER=root ; COMMAND=/bin/systemctl suspend
May 29 07:00:24 william sudo[31424]: pam_unix(sudo:session): session opened for user root by (uid=0)
May 29 07:00:24 william sudo[31424]: pam_unix(sudo:session): session closed for user root
May 29 07:00:24 william systemd[1]: wxforecast.service: Failed with result 'exit-code'.

状态定时器

● wxforecast.timer - Send Weather Update
   Loaded: loaded (/etc/systemd/system/wxforecast.timer; enabled; vendor preset: enabled)
   Active: active (waiting) since Sun 2020-05-24 18:33:02 CDT; 4 days ago
  Trigger: Sat 2020-05-30 07:00:00 CDT; 20h left

sus.sh

/usr/bin/sudo /bin/systemctl suspend

wxforecast.py

## https://github.com/stacybrock/wxforecast

import os
import nwswx
import requests


(LAT, LON) = [c.strip() for c in os.getenv('WXFORECAST_COORDINATES',
                                           '39.0693,-94.6716').split(',')]

def main():
    nws = nwswx.WxAPI('[wxforecast] [email protected]')
    result = nws.point_forecast(LAT, LON, return_format=nwswx.formats.JSONLD)
    forecast = result['periods'][0]

    # create pushover notification
    title = f"{forecast['shortForecast']}"
    msg = f"""{forecast['detailedForecast']}
    Temp: {forecast['temperature']}°{forecast['temperatureUnit']}
    Wind: {forecast['windSpeed']} {forecast['windDirection']}
    Details: https://forecast.weather.gov/MapClick.php?lon={LON}&lat={LAT}
    """
    r = requests.post('https://api.pushover.net/1/messages.json', data = {
        'token': os.environ['WXFORECAST_PUSHOVER_APP_KEY'],
        'user': os.environ['PUSHOVER_USER_KEY'],
        'message': msg,
        'title': title,
        'device': os.environ['PUSHOVER_DEVICE']
    })


if __name__ == '__main__':
    main()

wxforecast.service

[Unit]
Description=Send Weather Update
Wants=network-online.target
After=network-online.target

[Service]
Type=simple
Environment="WXFORECAST_PUSHOVER_APP_KEY=RandomAppKEY"
Environment="WXFORECAST_COORDINATES=31.02,-90.56"
Environment="PUSHOVER_DEVICE=weather"
Environment="PUSHOVER_USER_KEY=randomUserGroupKey"
ExecStart=/usr/bin/python3 /home/william/CODE/wxforecast/wxforecast.py
ExecStopPost=/bin/bash /usr/local/bin/sus.sh
StandardError=journal

wxforecast.timer

[Unit]
Description=Send Weather Update

[Timer]
OnCalendar=*-*-* 07:00:00
Persistent=true
WakeSystem=true
Unit=wxforecast.service

[Install]
WantedBy=timers.target

附加信息：Xubuntu 18.04 桌面。所有相关文件都作为单独的文件包含在要点中。

Parsa Mousavi - 可能是因为 WIFI。也许我需要将 python 行移动到 shell 脚本并在运行 python 脚本之前添加 sleep 命令。我会尝试一下，明天早上再报告。这似乎是唯一的原因，因为我没有/永远不会接近任何一个月免费帐户的 7500 个 API 请求，因为这应该每天只运行一次。最近我的右腿膝盖以下截肢后，我真的很疲惫。所以显而易见的事情似乎并不像它们应该的那样明显。 :(

答案1

解决方法是 ping google 直到它响应。用下面的代码（在 Serverfault 上找到）替换了我添加的 sleep（可能可以与 vanilla ping 一起使用，但这是我选择的）：

sudo apt-get install fping

HOSTNAMES=google.com
while ! fping -q $HOSTNAMES ; do :; done

现在它会 ping google 直到 google 响应，然后运行 ​​shell 脚本中的下一个命令。

感谢大家朝着正确的方向努力。

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