Script before and after Backup (Windows)

[twey]

Hi

I'm trying to achieve to run a Script before and after the Backup Snapshot of a Windows VM. I can run successfully the Script within the Console of the Host, but I don't figure out how I can run this in the right order.

Command run order:

qm guest exec 102 -- "powershell.exe" "-File" "C:\scripts\backup_pre.ps1"
vzdump 102 --mode=snapshot --compress zstd
qm guest exec 102 -- "powershell.exe" "-File" "C:\scripts\backup_post.ps1"

This works but took too long until the Post Script runs. Is the a possibility to run the Post Script immediately after the Snapshot inside the "vzdump 102 --mode=snapshot --compress zstd" Command was done?

Or is there another way to run the single steps that are done inside the vzdump command?

 

[leesteken]

The QEMU Guest Agent has a facility for this: search for "fsfreeze-hook" in the documentation: https://www.qemu.org/docs/master/interop/qemu-ga.html

 

[twey]

I have seen this hook for Linux VMs but I can't find this option for Windows VMs. Do you have any hints witch File this hooks are inside Windows VMs?

 

[leesteken]

I have seen this hook for Linux VMs but I can't find this option for Windows VMs. Do you have any hints witch File this hooks are inside Windows VMs?

Sorry, no experience with that. Maybe find out how the Windows service for it call the executable and add the --fsfreeze-hook= parameter?
There appears to be some kind of hookscipt for backups but I don't know the details. Maybe this post can get you started: https://forum.proxmox.com/threads/3...pbs-host-before-backup-job.111666/post-484924 ?