Poor Man's Proxmox Watchdog

A bash script working as a helthcheck for a VM.

Takes in a single argument in form of VMID.

./watchdog.sh <REPLACE_WITH_VMID>

Requirements

Copy/clone code into your directory

Add exec permission on watchdog.sh

chmod u+x /path/to/watchdog.sh

It's for a pretty specific usecase when you have HA opnsense running in 2 vm's.

If both VM's go down then this would start a third "emergency" VM running OPNSense.

You can also skip this and just add a third node to HA setup.

./watchdog.sh 100

*/5 * * * * /bin/bash /path/to/watchdog.sh 100

This will check every 5 minutes if a VM us runninig.

*/5 * * * * /bin/bash /path/to/watchdog.sh 100

*/2 * * * * /bin/bash /path/to/watchdog.sh 1003

*/2 * * * * /bin/bash /path/to/watchdog.sh 1004

This will check the HA 2 nodes every 2 minutes and backup one every 5 minutes.

where 1003 and 1004 are main HA nodes and 100 is the backup.