[ovirt-users] VM Deployment By Template

[Itamar Heim]

On 08/27/2014 04:18 AM, Punit Dambiwal wrote:
> Hi Michal,
>
> I want to deploy the VM with the template but the problem is in ovirt
> when you deploy the VM by template it copy the whole image(even thin or
> thick disk)...like if i have 40GB virtual size (actual size 1GB)
> disk....it will copy the whole 40GB to provision the virtual
> machine....so if i want to deploy 10 VM simultaneous then it will copy
> 4TB data and take long time to provision....
>
> I want the way i can make the template with small size....and once i
> choose to create the virtual machine with 40GB...the VM deploy with the
> small template on the 40GB disk... is it possible with ovirt.. ??

so you want to provision a VM with a different disk size than template.
good point. some thoughts:
1. for thinly provisioned (qcow2) - its COW, hence the same size.
2. for clone - actually, no reason shouldn't be supported easily.
3. we support "disk resize" since 3.4 (iirc), which you can do post VM 
provisioning.

considering #3, then #1 should be easy to support as well these days. 
please open an RFE.

>
> Thanks,
> Punit
>
>
> On Tue, Aug 26, 2014 at 9:01 PM, Michal Skrivanek
> <michal.skrivanek at redhat.com <mailto:michal.skrivanek at redhat.com>> wrote:
>
>
>     On Aug 26, 2014, at 12:01 , Punit Dambiwal <hypunit at gmail.com
>     <mailto:hypunit at gmail.com>> wrote:
>
>      > Hi Michal,
>      >
>      > 2. I find disk size can not modify at the time of VM
>     provisioning,is there any way to modify the VM disk size ??
>      >
>      > well, not really, AFAIK.
>      > create another disk, move your data, remove the original Or
>     create a bigger thin provisioned disk at the beginning...
>      >
>      > I didn't understand the mean...i can create the another
>     disk...it's ok...but how to move the data from the existing disk to
>     new disk at the time of the VM deployment... ?? is there any way to
>     move the data.. ??
>     Hi,
>
>     You would have to do that inside the guest…the same way as you would
>     do it on real hardware…mount both disks, move the relevant data
>     not trivial and not automated
>
>      >
>      > Another question is there any way to mount the img like i will
>     create the VM with blank template with my preferred disk size and
>     leter on install the OS through any OS template ??? i know i can
>     install the OS through CD-ISO but i don't want the manual installation…
>
>     so you want to have a preinstalled OS…so how did you want to use it?
>     I probably don't understand what are you trying to achieve.
>     Anything else than having a Template with OS and you deploy VMs from
>     that….you need to change disk sizes for each such VM? Could it be
>     done by adding an additional disk?
>
>     Thanks,
>     michal
>
>      >
>      > Thanks,
>      > Punit
>      >
>      >
>      > On Tue, Aug 26, 2014 at 5:51 PM, Michal Skrivanek
>     <michal.skrivanek at redhat.com <mailto:michal.skrivanek at redhat.com>>
>     wrote:
>      >
>      > On Aug 26, 2014, at 05:26 , Punit Dambiwal <hypunit at gmail.com
>     <mailto:hypunit at gmail.com>> wrote:
>      >
>      > > Hi All,
>      > >
>      > > I have some questions regarding the VM deployment through OS
>     template...
>      > >
>      > > 1. I have imported centos template from openstack glance (the
>     actual size of the template is 16GB but used is 1GB)...now my
>     question is if i deploy the new VM with this template,the process
>     will copy the whole 16GB or just 1 GB to create the new VM ??
>      >
>      > if you deploy with thin provisioned disks it should be 1GB
>      >
>      > >
>      > > 2. I find disk size can not modify at the time of VM
>     provisioning,is there any way to modify the VM disk size ??
>      >
>      > well, not really, AFAIK.
>      > create another disk, move your data, remove the original.
>      > Or create a bigger thin provisioned disk at the beginning
>      >
>      > >
>      > > Thanks,
>      > > Punit
>      > >
>      > >
>      > > On Mon, Aug 25, 2014 at 5:42 PM, Punit Dambiwal
>     <hypunit at gmail.com <mailto:hypunit at gmail.com>> wrote:
>      > > Hi All,
>      > >
>      > > I have some questions regarding the VM deployment through OS
>     template...
>      > >
>      > > 1. I have imported centos template from openstack glance (the
>     actual size of the template is 16GB but used is 1GB)...now my
>     question is if i deploy the new VM with this template,the process
>     will copy the whole 16GB or just 1 GB to create the new VM ??
>      > >
>      > > 2. I find disk size can not modify at the time of VM
>     provisioning,is there any way to modify the VM disk size ??
>      > >
>      > > Thanks,
>      > > Punit
>      > >
>      >
>      >
>
>