[one-users] Passing additional arguments to TM drivers

[MENDOZA, John Robert T.]

Hi Carlos,

Thank you for your prompt response.

Yes, it's not a volatile disk. It's an empty datablock disk which we
usually use to add disk storage to VMs requiring more capacity.

I'll try your suggestion. I didn't know that the VM template is first
updated even before the cloning action starts. This should work for me. :)

Thank you very much,
John Robert Mendoza




On Wednesday, 20 March, 2013 11:24 PM, Carlos Martín Sánchez wrote:
> Hi,
>
> First let me get your question straight. You are not talking about an
> empty volatile disk:
> DISK = [ SIZE = 123, FORMAT=raw ]
>
> What you have is a datablock type Image, and somehow you know it is
> empty and you can bypass the copy to the Host. Am I right so far?
>
> Instead of adding new parameters, I would try to get the information
> you need from the driver. Drivers are executed as the oneadmin user,
> so you can use the CLI or the ruby/java API.
>
> The clone script takes as arguments (see [1]):
> fe:SOURCE host:remote_system_ds/disk.i vm_id ds_id
>
> The 'i' in disk.i is the DISK/DISK_ID attribute. Knowing that, you can
> get the whole VM xml with 'onevm show vm_id -x', and use xpath to get
> the corresponding DISK/IMAGE_ID.
>
>
> Let me know if this works for you.
> Regards.
>
> [1] http://opennebula.org/documentation:rel3.8:sd
>
> --
> Carlos Martín, MSc
> Project Engineer
> OpenNebula - The Open-source Solution for Data Center Virtualization
> www.OpenNebula.org <http://www.OpenNebula.org> |
> cmartin at opennebula.org <mailto:cmartin at opennebula.org> | @OpenNebula
> <http://twitter.com/opennebula>
>
>
> On Wed, Mar 20, 2013 at 11:43 AM, MENDOZA, John Robert T.
> <bert at asti.dost.gov.ph <mailto:bert at asti.dost.gov.ph>> wrote:
>
>     Hi All,
>
>     I hope everyone is doing well. :)
>
>     Just want to know which part of the OpenNebula code do I have to
>     modify
>     to pass additional arguments to TM commands?
>
>     We're currently running a setup of SSH2LVM where we're using fs
>     datastore for OS, CDROM, and Datablock raw images. We're using LVM
>     logical volumes for our running VMs. Now, we're transferring the
>     images
>     from the datastore to the nodes via SSH and DD it to the local LVs in
>     the nodes. This is sufficient for OS images as it clones the image and
>     puts it into the local storage but for empty datablocks, say a 160GB
>     empty disk image, this takes a while. What we want is to pass the
>     IMAGE
>     ID to the tm_clone command so that we'll know if we'll be cloning the
>     image file or, an empty datablock, and if so, just create an LV on the
>     host node and attach it to the VM.
>
>     Thanks,
>     John Robert Mendoza
>
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>

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