How to edit *.qcow2

How to edit *.qcow2

[satimis]

Hi folks,

KVM
host – Debian 5.0

I need to mount kvm/qemu *.qcow2 image amending/reading its content. I  
can't figure out the type of file "-t"

    1. mount -t mke2fs -o loop VM/vm30.qcow2 /mnt
    2. mount -t e2fs -o loop VM/vm30.qcow2 /mnt
    3. mount -o loop VM/vm30.qcow2 /mnt
    4. mount -t ext3 -o loop VM/vm30.qcow2 /mnt
    5. mount -t ext2 -o loop VM/vm30.qcow2 /mnt

None of them can work. Please help TIA  Pointer would be appreciated.


B.R.
Stephen L

Re: How to edit *.qcow2

[Terry]

you need nbd-client and qemu-nbd to access qcow2 file.

satimis@pacific.net.hk wrote:
> Hi folks,
> 
> KVM
> host – Debian 5.0
> 
> I need to mount kvm/qemu *.qcow2 image amending/reading its content. I
> can't figure out the type of file "-t"
> 
>    1. mount -t mke2fs -o loop VM/vm30.qcow2 /mnt
>    2. mount -t e2fs -o loop VM/vm30.qcow2 /mnt
>    3. mount -o loop VM/vm30.qcow2 /mnt
>    4. mount -t ext3 -o loop VM/vm30.qcow2 /mnt
>    5. mount -t ext2 -o loop VM/vm30.qcow2 /mnt
> 
> None of them can work. Please help TIA  Pointer would be appreciated.
> 
> 
> B.R.
> Stephen L
> 
> -- 
> To unsubscribe from this list: send the line "unsubscribe kvm" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> 

Re: How to edit *.qcow2

[satimis]

Quoting Terry <hanfang@staff.sina.com.cn>:

> you need nbd-client and qemu-nbd to access qcow2 file.


Hi Terry,


Thanks for your advice.

Are qemu-nbd and kvm-nbd the same?

I can't find kvm-nbd on Debian 5.0
$ which qemu-nbd
No printout

I found kvm-nbd
$ which kvm-nbd
/usr/bin/kvm-nbd

Which package provide kvm-ndb?  Linux-tools ?


B.R.
Stephen L

Re: How to edit *.qcow2

[Asias He]

you can try guestfish.

http://libguestfs.org/recipes.html

2010/2/1  <satimis@pacific.net.hk>:
> Hi folks,
>
> KVM
> host – Debian 5.0
>
> I need to mount kvm/qemu *.qcow2 image amending/reading its content. I can't
> figure out the type of file "-t"
>
>   1. mount -t mke2fs -o loop VM/vm30.qcow2 /mnt
>   2. mount -t e2fs -o loop VM/vm30.qcow2 /mnt
>   3. mount -o loop VM/vm30.qcow2 /mnt
>   4. mount -t ext3 -o loop VM/vm30.qcow2 /mnt
>   5. mount -t ext2 -o loop VM/vm30.qcow2 /mnt
>
> None of them can work. Please help TIA  Pointer would be appreciated.
>
>
> B.R.
> Stephen L
>
> --
> To unsubscribe from this list: send the line "unsubscribe kvm" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>

Re: How to edit *.qcow2

[satimis]

Hi Liang,


Thanks for your advice and link.

Host - Debian 5.0
KVM
libvirt


> run  kvm-nbd  VM/vm30.qcow2, modprobe nbd
> nbd-client localhost 1024 /dev/nbd0

> then you can use /dev/nbd0 as a block device like /dev/sda

> I've write a little essay on how to install Debian on kvm image, FYI:

> http://blog.chinaunix.net/u/7667/showart_2112267.html


I can't find kvm-nbd and nbd-client.  I have nbd installed already.


$ yum list nbd
Loaded plugins: presto, refresh-packagekit
Available Packages
nbd.x86_64            2.9.13-1.fc12           fedora


$ which kvm-nbd
/usr/bin/which: no kvm-nbd in  
(/usr/lib64/qt-3.3/bin:/usr/kerberos/sbin:/usr/kerberos/bin:/usr/local/bin:/usr/bin:/bin:/usr/local/sbin:/usr/sbin:/sbin:/home/satimis/bin)


$ which qemu-nbd
/usr/bin/qemu-nbd


$ which nbd-client
/usr/bin/which: no nbd-client in  
(/usr/lib64/qt-3.3/bin:/usr/kerberos/sbin:/usr/kerberos/bin:/usr/local/bin:/usr/bin:/bin:/usr/local/sbin:/usr/sbin:/sbin:/home/satimis/bin)


I suppose qemu-nbd = kvm-nbd ?  Where is nbd-client ?

Any advice?  TIA


B.R.
Stephen

Re: How to edit *.qcow2

[Liang Guo]

在 星期五 05 二月 2010 14:54:57，satimis@pacific.net.hk 写道：
> Hi Liang,
> 
> 
> Thanks for your advice and link.
> 
> Host - Debian 5.0
> KVM
> libvirt
> 
> > run  kvm-nbd  VM/vm30.qcow2, modprobe nbd
> > nbd-client localhost 1024 /dev/nbd0
> >
> > then you can use /dev/nbd0 as a block device like /dev/sda
> >
> > I've write a little essay on how to install Debian on kvm image, FYI:
> >
> > http://blog.chinaunix.net/u/7667/showart_2112267.html
> 
> I can't find kvm-nbd and nbd-client.  I have nbd installed already.
> 
> 
> $ yum list nbd
> Loaded plugins: presto, refresh-packagekit
> Available Packages
> nbd.x86_64            2.9.13-1.fc12           fedora
> 
> 
> $ which kvm-nbd
> /usr/bin/which: no kvm-nbd in
> (/usr/lib64/qt-3.3/bin:/usr/kerberos/sbin:/usr/kerberos/bin:/usr/local/bin:
> /usr/bin:/bin:/usr/local/sbin:/usr/sbin:/sbin:/home/satimis/bin)
> 
> 
> $ which qemu-nbd
> /usr/bin/qemu-nbd
> 
> 
> $ which nbd-client
> /usr/bin/which: no nbd-client in
> (/usr/lib64/qt-3.3/bin:/usr/kerberos/sbin:/usr/kerberos/bin:/usr/local/bin:
> /usr/bin:/bin:/usr/local/sbin:/usr/sbin:/sbin:/home/satimis/bin)
> 
> 
> I suppose qemu-nbd = kvm-nbd ?  Where is nbd-client ?
In debian stable, kvm-nbd command is from pacakge kvm, please see 
http://packages.debian.org/lenny/amd64/kvm/filelist

If you are using Debian SID, you should use qemu-kvm instead of kvm. 

nbd-client command is from package nbd-client, please see:
http://packages.debian.org/lenny/amd64/nbd-client/filelist, It is in /sbin 
directory, so you should use root to run it.

qemu-nbd is from package qemu-utils, I have not use it, but I think it should 
do the same thing as kvm-nbd. 

I don't know fedora exactly, but I think fedora should have relevant package.

Best Wishes. 

-- 
Liang Guo
http://bluestone.cublog.cn