[SOLVED] LXC Container Snapshotting

[Bladerunner]

Hi, I am experimenting with LXC containers on my 4.2 host and I cannot take snapshots of my container. The container is stored in a local directory contained on an LVM volume.

Is there a way of doing LXC container snapshots? Any advice?

Thanks

 

[luizxavier36]

Yes, but you need to store your container on a "lvm-thin", see the images below:




The LVM-Thin is a block device that is not mounted as a directory.

 

[Bladerunner]

OK thank you. So I need to convert my existing LVM volume to LVM-Thin to do this. Can I 'borrow' some of my LVM storage to create LVM-Thin? I will look into this further. Thanks

 

[luizxavier36]

Can I 'borrow' some of my LVM storage to create LVM-Thin?
I do no, I think you need to remove the /var/lib/vz from fstab, destroy your lvm e and create a new lvm-thin, so you can add this in web ui.

I have a fresh install of proxmox 4.2, but you can create a lvm-thin with these steps:
https://access.redhat.com/documenta...ation/thinly_provisioned_volume_creation.html
(I never do this in real life, caution)

 

[fabian]

OK thank you. So I need to convert my existing LVM volume to LVM-Thin to do this. Can I 'borrow' some of my LVM storage to create LVM-Thin? I will look into this further. Thanks

Yes, you just need to create a thin pool as LV in your existing VG, and add that thin pool LV as lvm-thin storage in proxmox.

 

[Bladerunner]

great thanks folks - this is resolved. I shrank my existing volume and created a new thin volume, created the CT again and snapshots are enabled.