OpenVZ on LVM2?

[welbers]

Hi,

is it possible to have OpenVZ containers on LVM2 volumes or to have each container in its own volume? - I couldn't find any possibility in the webfrontend to do it.

By hand it's possible.

Thx
Andreas

 

[dietmar]

By hand it's possible.

How? AFAIK openvz does not support LVM devices.

 

[welbers]

How? AFAIK openvz does not support LVM devices.

I don't mean lvm2 in an OpenVZ, I mean OpenVZ in an lvm2 volume!

That's easy doing:
* create an lvm for every OpenVZ container as usual with "lvcreate ..."
* format it i.e. "mkfs.ext4 <lvm-volume>"
* mount each formated volume in /var/lib/vz/private/<id>
That's all.

 

[dietmar]

* mount each formated volume in /var/lib/vz/private/<id>
That's all.

Whils that looks easy, it breaks 'vzctl' - simple 'vzctl mount' command does not work in such configuration?

 

[Xentux]

Hi there,

proxmox 1.x was able to create a LVM2 volume during provisioning an OpenVZ Container to use this volume as the disk drive for the CT, in proxmox 2.0 I didn't find this possibility. I think welders means the same.
So, is it not supported in proxmox 2.0 to create LVMs for CTs? I only found this way for KVMs.

 

[dietmar]

proxmox 1.x was able to create a LVM2 volume during provisioning an OpenVZ Container to use this volume as the disk drive for the CT

Sorry, but that is simply not true.

 

[welbers]

Whils that looks easy, it breaks 'vzctl' - simple 'vzctl mount' command does not work in such configuration?

Hm, I'm very new to openvz but I can't see this problem.

I did some tests for you with my vm101 created as described above.
I have the directory /vz-containers where I mount each lvm2 volumen which contains an openvz container.
For the tests I mounted container 101 via soft-link with "ln -s /vz-containers/101 /var/lib/vz/private/101" and I did also a bind mount with
"mount --bind /vz-containers/101 /var/lib/vz/private/101".

All tests with vzctl were successful. I tried "start/stop/mount/umount/status.." and couldn't find a problem.
Example:
root@server:/vz# vzctl status 101
CTID 101 exist mounted running