Configuring UPS Service
2 minute read.
Last Modified 2022-06-08 12:29 EDTTrueNAS uses NUT (Network UPS Tools) to provide UPS support. When the TrueNAS system is connected to a UPS device, configure the UPS service by going to Services, finding the UPS entry, and clicking edit icon.
See UPS Screen for more information on UPS settings.
Some UPS models can be unresponsive with the default polling frequency.
This shows in TrueNAS logs as a recurring error like libusb_get_interrupt: Unknown error
.
If this log error occurs, decrease the polling frequency by adding an entry to Auxiliary Parameters (ups.conf): pollinterval = 10
.
The default polling frequency is two seconds.
upsc(8) can get status variables like the current charge and input voltage from the UPS daemon.
Run this command from the Shell using the syntax upsc ups@localhost
.
The upsc(8) manual page has other usage examples.
upscmd(8) can send commands directly to the UPS, assuming the hardware supports sending the command. Only users with administrative rights can use this command. These users are created in the Extra Users field.
See UPS screen for more information on setting up a UPS.