[Nut-upsuser] Apple Mac slave

Charles Lepple
Thu, 08 Jun 2017 13:09:28 -0000

On Jun 7, 2017, at 1:14 PM, Roger Price wrote:
>
> 2. On the NAS, use command
>
>   upsrw -s battery.charge.low=80 -u upsmaster -s sekret UPS

Robbie,

The "upsrw" command contacts upsd, so it sounds like you should be
able to add a user to upsd.users on the NAS, and then run something like this on
the Mac:

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

Per http://networkupstools.org/docs/man/upsd.users.html , the
"upsmaster" user would need at least "actions = SET". You
will need to reload upsd after changing upsd.users.

If the UPS is not turning itself off after the NAS goes into safe mode, it might
be possible to do this from the Mac. You probably have something like this in
the Mac's upsmon.conf:

   SHUTDOWNCMD "/sbin/shutdown -h +0"

You could add an UPS shutdown command before the Mac shutdown command:

   upscmd -u upsmaster -s sekret UPS at synology shutdown.stayoff

but you would need to be sure that the UPS shutdown delay is long enough to
allow the NAS to go into safe mode. (This is why it is recommended that the
master (the NAS in your case) initiate the UPS shutdown.) Also, you would need
to configure that NUT user to allow instant commands in upsd.users as well as
upsrw access.