Proxmox VE – The current guest configuration does not support taking new snapshots

Proxmox VE – The current guest configuration does not support taking new snapshots

I just deployed 3 node proxmox cluster with shared LVM storage, the main problem was, that new created VMs cannot create snapshots. I found, that i can choose only the .raw format of the disk for the new VMs and i cannot choose the .qcow2 which support the snapshots. 

I tried lot of re-configurations but the resolution of the problem was very simple. When i created the shared datastores for the cluster on LVM, i forget a add the line

snapshot-as-volume-chain

my config of /etc/pve/storage: 

lvm: DORADO-60TB-1
vgname vg-dorado-1
content images,rootdir
saferemove 0
shared 1
snapshot-as-volume-chain 1

lvm: DORADO-60TB-2
vgname vg-dorado-2
content images,rootdir
saferemove 0
shared 1
snapshot-as-volume-chain 1

Now with snapstoh-as-volume-chain 1 and enabled qcow2 you can create snapshots of your VMs.