Proxmox-NUT Homelab HOWTO - Step 5 : Install NUT UPS Solution / Configure NUT for Email Alerts and System Shutdown / Test
Step 5: Install NUT UPS Solution / Configure NUT for Email Alerts and System Shutdown / Test NUT will be installed on Debian (Proxmox) and will be linked to a single APC UPS. When there is a power failure, NUT will send an email. Its status will change from Online ( OL ) to On Battery ( OB ). When either the remain battery percentage charge goes below a certain value (85% in this example) or the remaining run time goes below a certain amount (15 minutes in this example), the UPS status will change from OB to Low Battery ( LB ). When the status becomes LB , NUT will send out an email and start shutting down Debian. As part of the Proxmox shutdown process it will shut down all guests running with it and then shut down itself. After that the OS shuts down. If the LB condition does not trigger within 5 minutes the UPS will shut down Proxmox. This is discussed further below. NUT manages other UPS status such as whether it is discharging and if the battery needs replacing. These set...