Hi Pierre-Francois,
> I am running 6 RPI4s with fedora 37. K3S is powering this cluster and it
> is working well :)
>
> But from time to time, 1 RPI is randomly hanging.
>
> I am thinking about implementing a watchdog :
>
> - software based, using embeded linux kernel
If the RPi itself is locking up I'm not sure how a SW based approach
would work, how would it trigger if the kernel isn't working? Also not
sure what you mean here but "embeded linux kernel", care to explain
some more?
> - hardware based such as https://www.omzlo.com/articles/the-piwatcher
The RPI4 already has a HW watchdog onboard, the driver is bcm2835_wdt,
maybe you could start by investigating the use of the Linux watchfog
stack with that. systemd has support for HW WDTs and we enable all the
pieces in Fedora already, I suspect that will be a good start for you.
>
> Do you have any experience on one of theses two solutions ? Do you have
> alternatives ?
>
>
> By the way your job is fantastic and it is a great pleasure to be able
> to run F37 on aarch64 so easily !
>
>
> Thanks a lot
>
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