Re: [Xen-API] ceph: No SR locations that can support this disk

[David Scott <dave.scott@xxxxxxxxxxxxx>]

Hi,

[cc:d xs-devel]

On 03/09/13 09:47, Guillaume Thouvenin wrote:
> Hello,
>
> I followed
> http://wiki.xenproject.org/wiki/Ceph_and_libvirt_technology_preview and
> I created a SR backed on ceph. When I create a VM through Xencenter, I
> cannot change the size of the disk. The installer proposes a disk of 8Go
> by default and when I edit the disk I have a message "No SR locations
> that can support this disk".
I'm not exactly sure what's causing this. If you select the SR can you 
see the size / free space reported anywhere in XenCenter?
> If I keep a size of 8Go the disk is well created on Ceph:
>
>   # xe vdi-list
>   uuid ( RO)                : 8348adf1-3f75-308f-16e9-8a12e31a3936
>           name-label ( RW): raringvm1 0
>
>   appears as:
>
>   # rados --keyring=/etc/ceph/keyring --id xen -p xen ls
>   .img.rbd
>
>
> I don't know how name is managed between the name of the disk in Xen and
> the name that we see in Ceph but .img.rbd corresponds to "rarginvm1 0"
> that is the name provided by default by the template.
I think we quite often create VDIs with empty names. This should work 
but is unnecessarily confusing -- we should try to base the disk names 
on the name of the VM in future :)
> I tried to create a disk directly with the CLI and it works:
>
> # xe vdi-create sr-uuid=86dd53ff-0cbb-200c-e12d-dfd8d3336c89 type=user
> virtual-size=3000000 name-label="itisatest"
> 022abcd4-e01e-3f49-85d7-d0699628978b
>
> # rados --keyring=/etc/ceph/keyring --id xen -p xen ls
> itisatest.img.rbd
>
>
> Any idea why I can not modify the size of the disk of my VM ?
I would recommend removing the existing disk from the VM (via XenCenter 
or the CLI) and then using the CLI command
  xe vm-disk-add sr-uuid=...

This should allow you to select any size you like.

Cheers,
Dave

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