[PVE-User] Proxmox not allow me create VM

[Dietmar Maurer]

> If, for some reason I need to deactive 2 node, from my 3 nodes cluster, the
> 1 remain node could not turns the /etc/pve into read-only state!
> I cannot understand why this happen!

You simply lose quorum.

> Could Proxmox just allow me to write into /etc/pve and after the others
> nodes are on line, just sync the content!

If you are sure the other 2 nodes are offline, you can set expected votes:

# pvecm expected 1

After that you can write into /etc/pve, and after the others nodes are 
online the will sync the content.