TrueNAS shuts down UPS when NUT initiates powerdown

[gordon19284]

I have my TrueNAS SCALE system connected to an APC Back-UPS Pro 1500VA. I have my UPS connected to TrueNAS via USB, and I have NUT (The UPS service) configured to shut down the server 90 seconds after the UPS goes on battery power. There is a "Power Off UPS" setting. I do not have it checked. Nevertheless, whenever my UPS goes on battery power, after 90 seconds the server shuts down as expected, but also sends the shutoff signal to the UPS, powering it down completely and cutting power to all the less power-hungry devices like my router that I want to stay up.

This is the exact behavior described in this post from 2015: NUT Powers off UPS. In upsmon.conf, I see the following:

Code:

SHUTDOWNCMD "/sbin/shutdown -P now"
POWERDOWNFLAG /etc/nokillpower

UPS.conf:

Code:

[ups]
    driver = usbhid-ups
    port = auto
    desc = ""

TrueNAS-SCALE-22.02.1

Any idea how I can get TrueNAS to stop shutting down my UPS?

 

[gordon19284]

Deleting the line entire POWERDOWNFLAG /etc/nokillpower and restarting NUT fixes this.

If the "Power Off UPS" setting is On, this line changes to /etc/killpower, and for off it's /etc/nokillpower. However, it doesn't seem to matter. Simply the presence of POWERDOWNFLAG causes the UPS to be sent the shutdown command.

Unfortunately, any manual edits to upsmon.conf are reverted whenever the system reboots.

 

[Samuel Tai]

There's no need to manually edit upsmon.conf. There's a convenient check box in the UPS service for this:

Just navigate to Services->UPS, and click the pencil icon to edit the NUT configuration.

 

[gordon19284]

There's no need to manually edit upsmon.conf. There's a convenient check box in the UPS service for this:

View attachment 55340

Just navigate to Services->UPS, and click the pencil icon to edit the NUT configuration.

Hi Samuel, thanks for the reply. In my initial post, I indicate that changing this setting does not fix the issue. No matter whether it's checked or not, the UPS gets powered down:

If the "Power Off UPS" setting is On, this line changes to /etc/killpower, and for off it's /etc/nokillpower. However, it doesn't seem to matter. Simply the presence of POWERDOWNFLAG causes the UPS to be sent the shutdown command.

 

[Samuel Tai]

OK, this warrants a bug report.

 

[gordon19284]

I now have the following shell script running at startup to fix this issue, as well as the issue from TrueNAS-SCALE-22.02.1: Incorrect permissions for Network UPS Tools config files break all UPS functionality. This just copies over a custom upsmon.conf that has the POWERDOWNFLAG line removed.

Code:

#!/bin/bash

/usr/bin/chown root:nut /etc/nut/*
cp /mnt/users/serveradmin/upsmon.conf /etc/nut/upsmon.conf
systemctl restart nut-server.service