Automatic shutdown of multiple ESXi and NAS from one UPS?

Question

NAS

Hello everyone
There are two iron servers with ESXi hypervisors, on which about 8 virtual servers are spinning. There is also a Synology NAS. It is planned to power it all from one UPS. Is it possible to turn off all this equipment when there is a power outage, if there is a connection only via USB or COM port? SNMP boards are very expensive, at least 10 tr. If realistic, how to organize a UPS connection diagram? Or still go broke on the control board?
UPS 99.9% most likely will not be APC

Answer 1

There is such an option:
https://blog.rylander.io/2017/01/15/connect-a-esxi... The
UPS is connected to Synology and the NUT server is turned on there, the NUT client is installed on ESXi.
I'm not sure if this works, I just found it myself and I'm going to implement it.

Answer 2

I won’t say about Synology, I’m not sure that it can lie down on a command from a third-party oops - it should have an agent standing on it, who will catch the message and give the command “Lie down!”.
About hosts.
ESXi does not have built-in monitoring tools for oops, for this you have to keep a virtual machine with a forwarded COM port on which the daemon is running that receives messages from oops. On command oops "Lie down!" the virtual machine must extinguish the neighboring host and its own. If there is a vCenter, then the command is sent through the vCenter tools, if not, directly to the host. It is clear that authorization and all that. There are scripts in tyrnet, I found them - both for sending via vCenter and directly

Answer 3

Yes, the NUT option will work - I did this with a regular iron NAS to which UPS was connected and which gave the command "Go to bed!" all 3rd ESX servers.
So yes it will work