Forced Power-Cycle with Back-UPS BX500MI

[alphakilo59]

Hello,

let me 1st leave a few words on myself. I'm retired, was working in networking-business for some 30 years and have some experience in IT/OSs/programming from that.

I recently bought 2 new APC-devices, one listed in subject to replace an existing without any steering-capabilities.

Target is to protect 2 Proxmox PVEs I'm using NUT-server and client for that via the USB-port to the UPS.

Generally the shutdown works well and likely (tests are time-consuming) also the recovery once the UPS shuts down the outputs and power gets back.

To achieve that I use:

...

shutdowncritical)
/usr/bin/upscmd -u <username> -p <password> apc@localhost load.off.delay 180
/usr/bin/upscmd -u <username> -p <password> apc@localhost shutdown.reboot
/usr/sbin/upsmon -c fsd

...

The other options have no action besides logging and I removed the lines for logger.

If battery.charge gets below battery.charge.low, the NUT-server starts forcing the clients to shut the Proxmox-guest-SW and the PVEs shut down well - all as expected.

If now the power comes back (perhaps before above 180s passed), the UPS keeps the output power untouched and due to that these servers stay down. I hoped that "load.off.delay 180" is sth the UPS remembers regardless of input, but if the NUT-server is responsible for that - that's already down then.

Am I missing sth? Should this be doable at all? What else would be needed to achieve a power-cycle, once the shutdown was triggered on clients.

Kind Regards,

Andreas