[ovirt-users] VM Deployment By Template

Itamar Heim iheim at redhat.com
Wed Aug 27 10:11:03 UTC 2014


On 08/27/2014 12:47 PM, Punit Dambiwal wrote:
> Hi Itamar,
>
> To edit the disk size are you referring this "Another way i got is
> create the VM with 1GB virtual template and expand the disk size after
> deployment...but the problem here is disk will expand...but it will not
> done any changes in the existing partition table..that means after
> expand disk you need to manual login in to server and make the changes
> with the help of fdisk and lvm commands..."
>
> Or it's different then the upper one...please let me know how to perform
> this...if any screen shot you can provide for better understanding..

http://www.ovirt.org/Features/Online_Virtual_Drive_Resize
adding derez for follow up questions

>
> Thanks,
> Punit
>
>
> On Wed, Aug 27, 2014 at 5:15 PM, Itamar Heim <iheim at redhat.com
> <mailto:iheim at redhat.com>> wrote:
>
>     On 08/27/2014 12:08 PM, Punit Dambiwal wrote:
>
>         Hi Itamar,
>
>         Thanks for the update....Yes.. i want to create different size
>         VM with
>         the same OS template...
>
>         ------------
>         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.
>         ------------
>
>         Could you please more elaborate point number 3...how to use
>         it..i will
>         go with this one ...
>
>
>     iirc, you just need to edit the disk size when vm is down or up (for
>     up, only for specific disk interfaces, virtio-blk, not ide, iirc)
>
>         Thanks,
>         Punit
>
>
>         On Wed, Aug 27, 2014 at 4:37 PM, Itamar Heim <iheim at redhat.com
>         <mailto:iheim at redhat.com>
>         <mailto:iheim at redhat.com <mailto:iheim at redhat.com>>> wrote:
>
>              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>
>                  <mailto:michal.skrivanek at __redhat.com
>         <mailto:michal.skrivanek at redhat.com>>
>                  <mailto:michal.skrivanek@
>         <mailto:michal.skrivanek@>__red__hat.com <http://redhat.com>
>
>                  <mailto: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>
>         <mailto:hypunit at gmail.com <mailto:hypunit at gmail.com>>
>                       <mailto:hypunit at gmail.com
>         <mailto:hypunit at gmail.com> <mailto: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>
>                  <mailto:michal.skrivanek at __redhat.com
>         <mailto:michal.skrivanek at redhat.com>>
>                  <mailto:michal.skrivanek@
>         <mailto:michal.skrivanek@>__red__hat.com <http://redhat.com>
>
>                  <mailto: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>
>         <mailto:hypunit at gmail.com <mailto:hypunit at gmail.com>>
>                       <mailto:hypunit at gmail.com
>         <mailto:hypunit at gmail.com> <mailto: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>
>         <mailto:hypunit at gmail.com <mailto:hypunit at gmail.com>>
>                  <mailto:hypunit at gmail.com <mailto:hypunit at gmail.com>
>         <mailto: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
>                        > >
>                        >
>                        >
>
>
>
>
>
>




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