LVM and Thin assistance.

[Mr_Fussy]

I have a node with a single VM. The node is showing with 100gb of space and backups clog that quickly. The VM has 200gb allocated, more than the node.

I note that the LVM is the 100gb and the LVM-Thin has 800gb. Numbers are rounded for ease, the drive is a 1tb. From research I can reallocate using the shell using something like:

"lvextend -L +500G /dev/pve/root..?"

Can someone help me understand this better. I am struggling to determine the correct file path and code. I would like to comprehend it further for future proofing myself.

Thanks.

 

[bbgeek17]

Rather than irrevocably extend your root filesystem, why not:
create new LV
format it with your favorite filesystem
mount it somewhere temporarily
move context of /var/lib/vz to /temporary
unmount /temporary
mount it to /var/lib/vz
update your fstab to ensure it mounts on reboot
update your /etc/pve/storage.cfg to indicate that its now a mountpoint
enjoy flexible space that you can expand or re-organize without affecting your root filesystem

Remember, you are running a Hypervisor where you can create a VM and do all the testing inside the VM. You can even install virtual PVE.

Good luck

---

Blockbridge : Ultra low latency all-NVME shared storage for Proxmox - https://www.blockbridge.com/proxmox

 

[Mr_Fussy]

Thanks BB. I'll research making a LV to understand it further. I have a single VM and don't imagine needing further VMs for my use case. With this would making a LV over extending the root be a better option? I'm not an advanced user, just need it to work so I stop running out of space with my backups of my VM.

 

[bbgeek17]

Only you can decide whats best for you.
This covers the steps
https://askubuntu.com/questions/126...rtition-of-ubuntu-20-04-with-an-lvm-partition
This command is fine for first step: lvextend -L +500G /dev/pve/root

---

Blockbridge : Ultra low latency all-NVME shared storage for Proxmox - https://www.blockbridge.com/proxmox

 

[bbgeek17]

backups clog that quickly

One more thought: Since your space consumer are backups - its not a good idea to store them on the same physical disk as what you are backing up.
May be you should invest a few $ and get an extra disk...

---

Blockbridge : Ultra low latency all-NVME shared storage for Proxmox - https://www.blockbridge.com/proxmox

 

[Mr_Fussy]

Actually, that is a much better idea. That passed over my head, did not even occur. Reallocating backups to another drive. The VM or Node does not need more space if this occurs. I probably even have an old drive lying around. So good. Thanks for the brainstorm.