creation of a simple file based volume driver in nova/volume/driver.py

[Christian Berendt]

I think we need the possibility to also save volumes on mounted NFS exports (or some other stuff locally mounted).

I tried to create a simple file based volume driver, creating new images with qemu-img and removing them with rm. Is this sufficient? At the moment I think only check_for_setup_error() is missing, I'll add this soon (checking for the existence of qemu-img and checking if the given mountpoint is mounted and is writable by nova).

Please give me some feedback and more ideas...

[Vish Ishaya (vishvananda)]

Nova-volume will attach locally if the export is on the same host as the instance you are trying to attach to.

Vish

On Feb 8, 2011, at 2:17 AM, Christian Berendt wrote:

> Public bug reported:
>
> I think we need the possibility to also save volumes on mounted NFS
> exports (or some other stuff locally mounted).
>
> I tried to create a simple file based volume driver, creating new images
> with qemu-img and removing them with rm. Is this sufficient? At the
> moment I think only check_for_setup_error() is missing, I'll add this
> soon (checking for the existence of qemu-img and checking if the given
> mountpoint is mounted and is writable by nova).
>
> Please give me some feedback and more ideas...
>
> ** Affects: nova
> Importance: Wishlist
> Status: Confirmed
>
> ** Branch linked: lp:~berendt/nova/FileDriver
>
> --
> You received this bug notification because you are a member of Nova Bug
> Team, which is subscribed to OpenStack Compute (nova).
> https://bugs.launchpad.net/bugs/715102
>
> Title:
> creation of a simple file based volume driver in nova/volume/driver.py
>
> Status in OpenStack Compute (Nova):
> Confirmed
>
> Bug description:
> I think we need the possibility to also save volumes on mounted NFS
> exports (or some other stuff locally mounted).
>
> I tried to create a simple file based volume driver, creating new
> images with qemu-img and removing them with rm. Is this sufficient? At
> the moment I think only check_for_setup_error() is missing, I'll add
> this soon (checking for the existence of qemu-img and checking if the
> given mountpoint is mounted and is writable by nova).
>
> Please give me some feedback and more ideas...
>
>

[Christian Berendt (berendt)]

I think per default the VolumeDriver() is used. VolumeDriver() uses LVM2 and creates new volumes in a VG, per default nova-volumes.

[Thierry Carrez (ttx)]

@Christian: still working on that ? Or should we unassign you and let someone else have a shot at it ?

[Rushi Agrawal (rushiagr)]

NFS driver added to Cinder. NAS enhancements, which include full support for file-based storage is up in review too!
https://review.openstack.org/#/c/11306/3
and
https://review.openstack.org/#/c/21290/