can't snapshot with bind mounts

[fraktal]

As in title, the snapshot button is disabled and pct tells me I can't do it since I set up bind mounts. I have backup=0 set on the bind mounts. Is this a config error on my end, or this widely experienced bug first reported in 2016 (with this workaround)?

 

[LnxBil]

There exist other workarounds:

If you use ZFS, you can simple create snapshots yourself via zfs snapshot. I use this all the time.

 

[fraktal]

Yes, you're right, thank you. Unfortunately I have several disks with lots of stuff on that are ext4 so that doesn't help me, but I'm sure the info will be helpful to others.

 

[LnxBil]

Unfortunately I have several disks with lots of stuff on that are ext4 so that doesn't help me

So, you have the containers on QCOW2 or what do you use as a container storage backend that supports snapshots?

 

[fraktal]

Sorry, I'm not sure I understand the question! the containers are on the NVMe ssd that I installed proxmox on, in whatever the default format is for that. Does that answer your question?

 

[LnxBil]

in whatever the default format is for that.

Okay, then it is lvm-thin. You can also create snapshots there manually.

 

[fraktal]

I don't think so, the snapshot button is greyed out, and pct snapshot 100 gives me an error (I'm not at home right now so I can't quote it).

edit:

If there is a way, I'd be grateful to know it?

 

[LnxBil]

If there is a way, I'd be grateful to know it?

Yes, manually. This means going down to the shell an create a snapshot by yourself. LVM snapshots are unfortunately not very virtual machine friendly and I never understood why they programmed it that way. Anyway, here is a howto to create snapshots manually:

https://www.tecmint.com/take-snapshot-of-logical-volume-and-restore-in-lvm/