[ovirt-users] VM File System expansion

[Punit Dambiwal]

Hi Rich,

I read this article :-
https://inthecloud.readthedocs.org/zh_CN/latest/index.html

and used below set of commands :-

Virtual Machine File System expansion
<https://translate.googleusercontent.com/translate_c?depth=1&hl=en&prev=/search%3Fq%3Dhttps://inthecloud.readthedocs.org%26biw%3D1440%26bih%3D789&rurl=translate.google.com.hk&sl=zh-CN&u=https://inthecloud.readthedocs.org/zh_CN/latest/posts/ch03.html&usg=ALkJrhiaix6TlqJPXyUpzoTY1kZriRpW3Q#id11>

oVirt 3.4 disks can be online expansion, but for the disk within a file
system requires a separate support for Linux and Windows lists commonly
used method in this expansion.

*Linux file system expansion (libguestfs)*

For details, please refer to libguestfs site
<https://translate.googleusercontent.com/translate_c?depth=1&hl=en&prev=/search%3Fq%3Dhttps://inthecloud.readthedocs.org%26biw%3D1440%26bih%3D789&rurl=translate.google.com.hk&sl=zh-CN&u=http://libguestfs.org/&usg=ALkJrhhw7qzZZdvvvGYkIoGrDbC9DiD_qw>
 .

   1. View disk

  # Virt-filesystem --all --long -h -a hda.img


   1. Expansion disk copy to be created, while the expansion of 10G
   (Assuming the original disk size is 10G)

For RAW format:

  # Truncate -r hda.img hda-new.img
 # Truncate -s + 10G hda-new.img

For QCOW2 and other compressed formats:

  # Qemu-img create -f qcow2 -o preallocation = metadata hda-new.img 20G


   1. Extended partition size

Ordinary extended partition, / boot partition expansion 200M, all the rest
to the / partition:

  # Virt-resize --resize / dev / sda1 = + 200M --expand / dev / sda2
hda.img hda-new.img

LVM partition expansion, expansion lv_root logical volume:

  # Virt-resize --expand / dev / sda2 --LV-expand / dev / vg_livecd /
lv_root hda.qcow2 hda-new.qcow2

Thanks,
Punit




On Thu, Sep 4, 2014 at 3:53 PM, Richard W.M. Jones <rjones at redhat.com>
wrote:

> On Thu, Sep 04, 2014 at 09:51:53AM +0800, Punit Dambiwal wrote:
> > Hi,
> >
> > I read this article and found that we can expand the VM disk online but
> it
> > doesn't expand the filesystem of the VM.....
>
> Which article?
>
> virt-resize can only be used for offline expansion of disks.
>
> If you used virt-resize, what precise commands did you type and
> what exact errors did you see?
>
> Rich.
>
> --
> Richard Jones, Virtualization Group, Red Hat
> http://people.redhat.com/~rjones
> Read my programming and virtualization blog: http://rwmj.wordpress.com
> virt-df lists disk usage of guests without needing to install any
> software inside the virtual machine.  Supports Linux and Windows.
> http://people.redhat.com/~rjones/virt-df/
>
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