[Nut-upsuser] Apple Mac slave

Robbie van der Walle
Wed, 07 Jun 2017 19:42:52 -0000

> I see upsd and the first upsmon are running as "root".  They are
often run as user "nut" or "upsd?.

Apparently Synology has implemented it standard like this.

Upsmon.conf on the Synology NAS:

RUN_AS_USER root

I suppose this needs to be changed from a security point of view.


> I don't know the Synology NAS, but I guess that unless it is shutdown
completely, it will still draw power.  Will the safe-mode drain the UPS
completely, leading to a crash?

Good question and I don?t know the answer yet.

This is what I can find about safe-mode means that all services are stopped and
volumes (unmounted). So I quess it is not completely shut down and wil draw
still power.

I have to examine this.


> Out of curiosity, when you shut down the NAS, do you run the command
> "upsdrvctl shutdown" ?  Do you see or hear anything to suggest
that the delayed UPS shutdown has happened?

I don?t know where to search to answer this. The delayed UPS shutdown means that
Synology NAS will turn off the UPS after the delay?


ups.delay.shutdown Interval to wait after shutdown with delay command (seconds).
Shutdown of what?  I don?t know what is means.


> Now for the Mac: You will need to have upsmon running on the Mac
> with a MONITOR declaration of the form
>
>   MONITOR UPS at NAS 1 <upsmaster> <password> slave
>
> Setting "slave" says that upsmon on the Mac is to shutdown the
Mac as soon as LB is detected in the NAS.

On the Mac I have in upsmon.conf

MONITOR ups@<ip address> 1 <user> <password> slave

2. On the NAS, use command

  upsrw -s battery.charge.low=80 -u upsmaster -s sekret UPS

to set the low limit very high during testing.  This will speed up your testing.
You can reset it to something else later.

When I run this command:

upsc ups at localhost:



battery.charge.low: 10


The commando upsrw cannot be found on the Synology NAS?



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