Ping a device that isn't on a UPS. Answer from cjc4096 on reddit.com
Proxmox
forum.proxmox.com › home › forums › proxmox backup server › proxmox backup: installation and configuration
Proxmox UPS and Power Loss | Proxmox Support Forum
December 28, 2021 - It can monitor a attached UPS for the power and battery status and you can then tell it to shutdown your host when only x% of battery is left. A shutdown will automatically gracefully stop your VMs.
Proxmox
forum.proxmox.com › home › forums › proxmox virtual environment › proxmox ve: installation and configuration
Shutdown UPS with nut | Proxmox Support Forum
February 6, 2024 - upscmd -u upsmon -p xxx idr600 shutdown.return the ups shuts down and restarts when the energy is back. But this is already after 5 seconds. So I am not able to shutdown in this time.
Proxmox home server : UPS & remote management
The best NUT server tutorial. https://www.youtube.com/watch?v=vyBP7wpN72c This will absolutely get you on the right track to setup what you want. More on reddit.com
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July 17, 2023UPS shutdown | Proxmox Support Forum
HowTo Shut down when electricity is down AND Boot up when electricity is back I have a UPS connected to Synology NAS What to set up in ProxMox to achieve this? Is it enough to just enter the... More on forum.proxmox.com
Creative ways to Shut Down a Proxmox host on UPS without USB battery monitoring?
Ping a device that isn't on a UPS. More on reddit.com
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November 22, 2024UPS APC to shutdown VMs? | Proxmox Support Forum
Hi, I was wondering if someone else has accomplished with apcupsd to shutdown the vms after certain amount of battery. Or should i go with NUT? Currently got it working great with apcupsd but wanted to know if its possible to shutdown the vms? Thank you More on forum.proxmox.com
Videos
15:05
Proxmox/Home Assistant Battery Backup with Cyberpower/NUT - YouTube
15:03
Saving Power in my Homelab with Auto-Shutdown for Proxmox Backup ...
15:38
Proxmox-NUT Homelab HOWTO - Step 5 : Install NUT UPS / Configure ...
10:15
Proxmox Back-Ups, Restorations, and a Work Around - YouTube
GitHub
github.com › jordanmack › proxmox-ups-shutdown
GitHub - jordanmack/proxmox-ups-shutdown: A script for managing graceful shutdowns of virtual machines in Proxmox during power failures using NUT (Network UPS Tools) and UPS (Uninterruptible Power Supply). Features configurable wait times and force shutdown options. · GitHub
A script for managing graceful shutdowns of virtual machines in Proxmox during power failures using NUT (Network UPS Tools) and UPS (Uninterruptible Power Supply). Features configurable wait times and force shutdown options. - jordanmack/proxmox-ups-shutdown
Author jordanmack
Reddit
reddit.com › r/proxmox › proxmox home server : ups & remote management
r/Proxmox on Reddit: Proxmox home server : UPS & remote management
July 17, 2023 -
Hi,
I have a Proxmox server (6.3-2) at home running a couple of VMs.
I would like to install a UPS (Uninterruptible Power Supply) able to :
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Stop properly the Proxmox server when the power goes off
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Restart the Proxmox server when the power comes back.
I guess, I need a UPS (APC vs EATON vs other ?), and I think (but not sure if it can do what I want) I also need another server (e.g. Raspberry Pi) running NUT (https://networkupstools.org/ ) .
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Is that correct ?
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What are your advices to achieve this ?
Many thanks for your help
Top answer 1 of 5
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The best NUT server tutorial. https://www.youtube.com/watch?v=vyBP7wpN72c This will absolutely get you on the right track to setup what you want.
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Disclaimer: I work at Eaton. Generally, Network UPS Tools (NUT) seems like it could help here. I made a script that simplifies NUT install: https://github.com/dzomaya/NUTandRpi Should work with other vendor's UPSes, but obviously I have a preference on which one you should use! Techno Tim has used the script too (he made the really good YouTube post on NUT config others have mentioned): https://technotim.live/posts/new-ups-rack/ Ping me if you have questions.
HardTechnology Blog
blog.hardtechnology.net › post › proxmox-nut
Configure Proxmox for Automatic Shutdown with your SNMP UPS with nut - HardTechnology Blog
November 2, 2025 - Proxmox doesn’t have a built in method to trigger safe shutdown from a UPS (Uninteruptable Power Supply).
KREAWEB
kreaweb.be › diy-home-server-2021-software-proxmox-ups
DIY HOME SERVER 2021 - Software - PROXMOX - NUT UPS Monitoring | KREAWEB
February 1, 2025 - ... Now you can test if your system shuts down gracefully. In Proxmox, select your PVE node → Shell. ... Your system should shut down all its subsystems and then shutdown itself.
Proxmox
forum.proxmox.com › home › forums › proxmox virtual environment › proxmox ve: installation and configuration
UPS shutdown | Proxmox Support Forum
December 4, 2020 - if you have a proxmox backup Server and PVE on the same hardware ! connect from the PBS to the PVE and shut down there pve will shut down the VM first ... I started over after I manually deleted all nut config files and reinstalled nut.
Bachelor Tech
bachelor-tech.com › home › 1. automated proxmox ups shutdown process – goals & installation
1. Automated Proxmox UPS Shutdown Process - Goals & Installation - Bachelor Tech
October 28, 2025 - Monitors your UPS and triggers shutdowns at dynamic battery levels. Gracefully shuts down multiple Proxmox hosts in a staggered, controlled-chaos-free order.
Reddit
reddit.com › r/homelab › creative ways to shut down a proxmox host on ups without usb battery monitoring?
r/homelab on Reddit: Creative ways to Shut Down a Proxmox host on UPS without USB battery monitoring?
November 22, 2024 -
Howdy folks. I have a situation where I have a Proxmox host I have setup is connected to a UPS, but that UPS for some reason does not have a data interface at all (I guess it was cheap). I was thinking of setting up a crontab command that runs every 5 minutes, and if a smart network switch that is NOT connected to the UPS isn't responding for more than 1 minute, it initiates a shutdown of my Proxmox host (as it would only be unresponsive if power goes out).
Has anyone done something like this? Just wondering what options I have. Would rather not buy extra equipment or replace the UPS if avoidable as it was only just purchased recently. Suggestions appreciated.
Top answer 1 of 17
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Ping a device that isn't on a UPS.
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If your system has a serial port, you can wire one of the non data pins to a 5 volt power supply not on the ups. You can check the state of that pin to detect when the power is out. You could plug a USB drive into an externally powered USB hub. The USB device will go away when the power goes out.
Technical Notes
luispa.com › posts › proxmox and ups: graceful shutdown
Proxmox and UPS: Graceful Shutdown | Technical Notes
July 25, 2025 - Note that nut is the one in charge, ... View script /usr/local/sbin/nut-shutdown-master.sh ... Settings > Devices & Services > “Network UPS Tool (NUT)”....
Proxmox
forum.proxmox.com › home › forums › proxmox virtual environment › proxmox ve: installation and configuration
UPS APC to shutdown VMs? | Proxmox Support Forum
May 28, 2019 - Successfully tested the setup on my ProxMox server with the UPS Network Management Card 2. ... Click to expand... No. Like I said before, you can have a server with usb connection to a APC battery. The if this server have network, then any other server (hw or virtual with network access ) can use the APC info (power on/off, battery level) to shutdown.
GitHub
gist.github.com › steffenba › 8c582d8ffcdf7d2f2cb939564d564a8b
Proxmox: Shutdown via NUT with a NAS as UPS master · GitHub
For this, I found a solution in the Proxmox forums, that I just want to keep here as well, to ensure redundancy. Original Thread ... RUN_AS_USER root MONITOR qnapups@xxx.xxx.xxx.xxx 1 admin 123456 secondary MINSUPPLIES 1 SHUTDOWNCMD "/sbin/shutdown -h" NOTIFYCMD /usr/sbin/upssched POLLFREQ 2 POLLFREQALERT 1 HOSTSYNC 15 DEADTIME 15 POWERDOWNFLAG /etc/killpower NOTIFYMSG ONLINE "UPS %s is back online" NOTIFYMSG ONBATT "UPS %s on battery" NOTIFYMSG LOWBATT "UPS %s battery low" NOTIFYMSG FSD "UPS %s: forced shutdown in progress" NOTIFYMSG COMMOK "Communcation to UPS %s reestablished" NOTIFYMSG COM
Windgate
windgate.net › home › firewalls & routers › unifi & proxmox graceful shutdown on apc ups when there is power loss
UNIFI & PROXMOX graceful shutdown on APC UPS when there is power loss - windgate
December 1, 2025 - alias: WHEN UPS GOES TO BATTERY ... - switch.shutdown_unifi - switch.shutdown_pve mode: single ... In my case, if the UPS charge goes below 14% it runs script for UNIFI & PROXMOX shutdown....
Reddit
reddit.com › r/proxmox › setting up apc ups safe shutdowns on proxmox hosts
Setting up APC UPS Safe Shutdowns on Proxmox Hosts : r/Proxmox
February 2, 2026 - Edit the /etc/nut/upsmon.conf and /etc/nut/upsmon.conf to setup proxmox as a nut client. Also, on the Synology it's important to set the Shutdown UPS when system enters stand-by true. That's to cover the case where you lose power but then get it back before the UPS battery runs down.
Proxmox
forum.proxmox.com › home › forums › proxmox virtual environment › proxmox ve: installation and configuration
[SOLVED] - NUT Client configuration -> help needed for shutdown Proxmox host | Proxmox Support Forum
April 23, 2023 - GNU nano 5.4 upssched.conf CMDSCRIPT /etc/nut/upssched-cmd PIPEFN /etc/nut/upssched.pipe LOCKFN /etc/nut/upssched.lock AT ONBATT * START-TIMER onbatt 600 AT ONLINE * CANCEL-TIMER onbatt online AT LOWBATT * EXECUTE onbatt AT COMMBAD * EXECUTE commbad_message AT COMMOK * EXECUTE commok_message AT NOCOMM * EXECUTE nocomm_message AT SHUTDOWN * EXECUTE shutdown_message AT SHUTDOWN * EXECUTE powerdown UPSSCHED CMD ... GNU nano 5.4 upssched-cmd #!/bin/sh case $1 in onbatt) logger -t upssched-cmd "UPS im Akkumodus" /usr/sbin/upsmon -c fsd ;; commbad_message) echo "UPS ist nicht mehr verbunden" | mailx
GitHub
github.com › jordanmack › proxmox-ups-shutdown › blob › main › proxmox-shutdown.sh
proxmox-ups-shutdown/proxmox-shutdown.sh at main · jordanmack/proxmox-ups-shutdown
A script for managing graceful shutdowns of virtual machines in Proxmox during power failures using NUT (Network UPS Tools) and UPS (Uninterruptible Power Supply). Features configurable wait times and force shutdown options. - proxmox-ups-shutdown/proxmox-shutdown.sh at main · jordanmack/proxmox-ups-shutdown
Author jordanmack
Proxmox
forum.proxmox.com › home › forums › proxmox virtual environment › proxmox ve: installation and configuration
NUT with UPS shutdown | Proxmox Support Forum
December 11, 2022 - If you want the UPS to shut down after the VM's, you can modify the shutdown sequence in your upsmon.conf file to reflect this. Alternatively, you can try using a callback function in your shutdown scripts to initiate the UPS shutdown after ...
Proxmox
forum.proxmox.com › home › tags
ups | Proxmox Support Forum
At the moment this is simply a /sbin/shutdown -h +0... ... Hi, I would try to manage this scenario: Ups connected to a qnap, proxmox with nut server need to be capable to switch OFF, after a time, properly, using proxmox shell :now with upsc ...
Vinchin Backup
vinchin.com › home › vm tips › how to set auto shutdown in proxmox with 4 simple methods?
How to Set Auto Shutdown in Proxmox with 4 Simple Methods? | Vinchin Backup
June 18, 2025 - Method4. UPS + NUT integration · Enabling auto shutdown in Proxmox allows you to power off the host or its VMs and containers automatically without manual input. You can trigger it by schedule, idle status, or UPS events.
Reddit
reddit.com › r/proxmox › pve 9.2 - ups shutdown all nodes (new disarm-ha)
r/Proxmox on Reddit: PVE 9.2 - UPS shutdown all nodes (new disarm-ha)
May 26, 2026 -
Hello,
With Proxmox 9.2 and the new "disarm-ha" and "arm-ha" commands, wondering how to best utilize them (or not) when shutting down all 3 nodes at same time due to low UPS battery. All 3 of my nodes are on same UPS, and yes I know it's not best practice.. but this is my home environment.
I have nut-client configured and working on all 3 nodes using the following in "upsmon.conf"
SHUTDOWNCMD:
"/sbin/pvecm expected 1 && /usr/sbin/ha-manager set --state stopped && sleep 15 && /sbin/shutdown -h now"
Just not sure if this is the right way or if there is a better way to do this with the new commands? I would want HA re-enabled as nodes power back on.
Just want to keep a migration storm from happening when they all shutdown at the same time.
Any feedback & suggestions are appreciated!
And yes, I have proper backups going to my NAS and another location worst case scenario..
Thank you!
Top answer 1 of 2
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Why not just shut all running VMs/containers first and then all hosts after?
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i’m running the exact same setup with NUT and a ups, all you have to do is simply set the HA shutdown policy from migrate to freeze, this way when a shutdown command is sent to your hosts they won’t attempt to move the HA resources to nodes that are also shutting down. and an FYI the default shutdown command in nut-monitor already stops all vm’s first and then shuts down the host on each machine