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进一步阅读

tag-icon • tag-icon systemd watchdog
进一步阅读

我正在尝试启用该watchdog服务（在 Raspbian Jessie 上）。

我已经安装watchdog并（希望）配置它。 sudo systemctl start watchdog似乎启动就OK了

systemctl status watchdog.service显示它正在运行：-

● watchdog.service - watchdog daemon
   Loaded: loaded (/lib/systemd/system/watchdog.service; static)
   Active: active (running) since Mon 2017-02-20 15:52:46 AEDT; 22s ago
  Process: 1828 ExecStart=/bin/sh -c [ $run_watchdog != 1 ] || exec /usr/sbin/watchdog $watchdog_options (code=exited, status=0/SUCCESS)
  Process: 1824 ExecStartPre=/bin/sh -c [ -z "${watchdog_module}" ] || [ "${watchdog_module}" = "none" ] || /sbin/modprobe $watchdog_module (code=exited, status=0/SUCCESS)
 Main PID: 1831 (watchdog)
   CGroup: /system.slice/watchdog.service
           └─1831 /usr/sbin/watchdog

当我尝试启用它时，sudo systemctl enable watchdog我得到了这个奇怪的输出

Synchronizing state for watchdog.service with sysvinit using update-rc.d...
Executing /usr/sbin/update-rc.d watchdog defaults
Executing /usr/sbin/update-rc.d watchdog enable
The unit files have no [Install] section. They are not meant to be enabled
using systemctl.
Possible reasons for having this kind of units are:
1) A unit may be statically enabled by being symlinked from another unit's
   .wants/ or .requires/ directory.
2) A unit's purpose may be to act as a helper for some other unit which has
   a requirement dependency on it.
3) A unit may be started when needed via activation (socket, path, timer,
   D-Bus, udev, scripted systemctl call, ...).

systemctl list-units |尝试sudo update-rc.d watchdog enable似乎都没有成功grep 看门狗

cat /lib/systemd/system/watchdog.service确实没有 [Install] 部分

[Unit]
Description=watchdog daemon
Conflicts=wd_keepalive.service
After=multi-user.target
OnFailure=wd_keepalive.service

[Service]
Type=forking
EnvironmentFile=/etc/default/watchdog
ExecStartPre=/bin/sh -c '[ -z "${watchdog_module}" ] || [ "${watchdog_module}" = "none" ] || /sbin/modprobe $watchdog_module
ExecStart=/bin/sh -c '[ $run_watchdog != 1 ] || exec /usr/sbin/watchdog $watchdog_options'
ExecStopPost=/bin/sh -c '[ $run_wd_keepalive != 1 ] || false'

[Install]

我如何调试它，并让看门狗在启动时运行

我添加了以下内容/lib/systemd/system/watchdog.service

[Install]
WantedBy=multi-user.target

watchdog现在开始。我需要测试以确保它有效！

答案1

这是 Debian 的一个已知错误。Debian 看门狗包的 systemd 集成经历了几轮，变化很大。正如您所发现的，作为 Debian 8 发布的看门狗包实际上是不起作用的。预发布测试没有发现这一点。

该错误已在该包的 5.15-1 版本中得到修复，同时还修复了错误的服务单元语法（也可以在您的服务单元中看到）。该版本在 Debian 8 向后移植中不可用，尽管已经提出了两个请求（显然被忽略）。

进一步阅读

答案2

对于armbian，您可以手动安装更新包：

wget http://ftp.debian.org/debian/pool/main/w/watchdog/watchdog_5.15-2_armhf.deb
dpkg -i watchdog_5.15-2_armhf.deb
systemctl enable watchdog

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