I'm in trouble with watchdog :(

Is there any way to register application into systemd watchdog at runtime?

Does linux watchdog only use for system reset or it can be use for application reset?


Systemd's watchdog can be mainly used for 3 different actions:

  • hardware reset (leveraging the CPU hardware watchdog exposed at /dev/watchdog). This is enabled by the RuntimeWatchdogSec= option in /etc/systemd/system.conf
  • application reset, as long as this is foreseen in the systemd unit definition
  • system reset as a fallback measure in response to multiple unsuccessful application resets. Also defined in the systemd unit

example unit file:

Description=My Little Daemon


The example is taken from: http://0pointer.de/blog/projects/watchdog.html, which gives a pretty complete overview of what and how you can use the watchdog service.


The Linux watchdog daemon should be used for system reset jobs, though it can also run a "repair binary" on persistent errors that could be used to fix or restart a process. Generally speaking, to monitor daemon processes and restart them you should use the init/upstart/systemd supported methods as already answered and keep the watchdog operation for the most serious "only a reboot is likely to fix things" situations.

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