[ovirt-users] VM Deployment By Template
OvirtAndKvm
oVirt at goproject.info
Thu Aug 28 07:27:55 UTC 2014
Punit,
What file system is your VM's partition, what operating system and
version ?
A question to others, if the doco says "we support "disk resize" since
3.4", for what virtual disk type, and which operating systems and
their partition types are supported by this. I would have believed
you would needed to have used LVM and then add the new disk space as a
new LUN, and map the new lun, while also using a file system that
allows for expansion. Some file systems like XFS can be extended (i.e.
grow) while being mounted. This is about the limit of my knowledge so
if you know more, please let us know what is possible.
> > > 3. we
support "disk resize" since 3.4
> > > (iirc), which you can
> > > do post
> > > VM
provisioning.
http://www.gnu.org/software/parted/manual/html_node/parted_31.html
Grow partition 1, into the adjacent free space:
(parted) resize 1 0.063
874.9http://geekpeek.net/resize-filesystem-fdisk-resize2fs/
http://www.linuxuser.co.uk/features/resize-your-disks-on-the-fly-with-lvm
http://docs.oracle.com/cd/E37670_01/E37355/html/ol_grow_xfs.html
You can use the xfs_growfs command to increase the size of a mounted
XFS file system if there is space on the underlying devices to
accommodate the change.
http://www.ovirt.org/Features/Online_Virtual_Drive_Resize
Features/Online Virtual Drive Resize
QEMU-GA
* support for notifying the guest and updating the size of the
visible disk: [Yet?] To be integrated
http://serverfault.com/questions/122042/kvm-online-disk-resize
AFAIK, this is not possible -- you can add new disk images, and as you
point out you could also add new images to an LVM volume, but in order
to resize an active, bootable disk image you need to be able to shut
it down and edit the partitions.
It is possible to move a Linux system between disks while it's
running. The limitation is that you cannot alter partitions on a disk
that has partitions in use.
To do this your root filesystem must be on an LVM, this often means
that you have to have a separate boot filesystem (this is not,
however, essential, it just makes things easier)
At Thursday, 28-08-2014 on 16:49 Shahar Havivi wrote:
On 28.08.14 11:05, Punit Dambiwal wrote:
> Hi All,
>
> Please help me to solve this problem...or suggest me any workaround
??
>
> Thanks,
> Punit
>
>
> On Wed, Aug 27, 2014 at 8:01 PM, Karli Sjöberg wrote:
>
> > On Wed, 2014-08-27 at 19:52 +0800, Punit Dambiwal wrote:
> > > Hi Itamar,
> > >
> > >
> > > It's the same as i used and discussed in last reply...create the
VM
> > > with 1GB virtual template and expand the disk size after
> > > deployment...but the problem here is disk will expand or
resize...but
> > > it will not make any changes in the existing partition
table..that
> > > means after expand disk all the existing partition will remain
> > > same....then you need to manual login in to server and make the
> > > changes with the help of fdisk and lvm commands..
> > >
> > >
> > > I am looking for the way we can resize the disk...and at the
same time
> > > when the disk will expand...it should be resize the partition
table...
> >
> > I think this is what you were after:
> > "QEMU-GA
> >
> > support for notifying the guest and updating the size of
the visible
> > disk: To be integrated "
> >
> > So maybe you could post an RFE on that for "qemu-ga"? Help
testing?
> >
> > /K
> >
> > >
> > >
> > > Is the cloud-init...custom script can do this or not ??
You may be able to do that with cloud-init custom-script section,
The following link will show you how to add a file to the client, you
may write a code
that change the partition table, you need to make the file executable
and put
it in a init section (such as /etc/init.d sections), the only problem
is that
it may be too late since cloud-init may be loaded after that phase...
(so
maybe other place...)
http://cloudinit.readthedocs.org/en/latest/topics/examples.html#writing-out-arbitrary-files
Another option is to set a command under this section:
http://cloudinit.readthedocs.org/en/latest/topics/examples.html#run-commands-on-first-boot
Shahar.
> > >
> > >
> > > Thanks,
> > > Punit
> > >
> > >
> > > On Wed, Aug 27, 2014 at 6:11 PM, Itamar Heim wrote:
> > > 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
> > > > >
> > > > 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
> > > >
>
> > >
> > > >
> >> 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
> >
>
> >
> >
>
> > >
> > >
> >
>
> > __red__hat.com
> > >
> > >
> > >
> >
>
> > >>> wrote:
> > >
> > >
> >
>
On Aug 26, 2014, at 12:01 ,
> > > Punit Dambiwal
> >
>
> >
> > > >
> >
> >
>
> >
> > > >
> >>> 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
> >
>
> >
> >
>
> > >
> > >
> >
>
> > __red__hat.com
> > >
> > >
> > >
> >
>
> > >>>
> > >
> >
>
wrote:
> >
> >
> >
> >
On Aug 26, 2014, at 05:26 ,
> > > Punit Dambiwal
> >
>
> >
> > > >
> >
> > >
> >
>
> >
> > > > >
> > > >>> 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
> >
>
> >
> > > >
> >
> > >
> >
>
> >
> > >
> > > >
> >>> 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
> >
> >
>
> >
> >
> >
> >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> >
> >
> >
> > --
> >
> > Med Vänliga Hälsningar
> >
> >
> >
-------------------------------------------------------------------------------
> > Karli Sjöberg
> > Swedish University of Agricultural Sciences Box 7079 (Visiting
Address
> > Kronåsvägen 8)
> > S-750 07 Uppsala, Sweden
> > Phone: +46-(0)18-67 15 66
> > karli.sjoberg at slu.se
> >
> _______________________________________________
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