[Nut-upsuser] Apple Mac slave

Charles Lepple clepple at gmail.com
Thu Jun 8 13:09:28 UTC 2017

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


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.

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