3:28 a.m.
Hello All,
I am trying to create a Domain/VM copy program.
In this program, a completely new domain should be created from a source
domain.
What I tried so far is this:
1. Get the XML Desc of the source Domain using "virDomainGetXMLDesc".
2. Get the Hypervisor Object for the source Domain using
"virDomainGetConnect".
3. Create a new Domain using the "virDomainCreateXML" method.
After doing this, I get the following error:
libvirt.libvirtError: POST operation failed: xend_post: error from xen
daemon: (xend.err "Error creating domain: VM name already in use by domain
4")
First of all, Is this the correct way to create a new Domain as a copy of
the original??
If not, please tell me how should I go about this??
Thanks and Regards
Sagar Barve
3:58 a.m.
Hello,
Am Donnerstag 10 Juni 2010 10:28:15 schrieb IKI-サガル バルウェ:
1. Get the XML Desc of the source Domain using
"virDomainGetXMLDesc".
2. Get the Hypervisor Object for the source Domain using
"virDomainGetConnect".
3. Create a new Domain using the "virDomainCreateXML" method.
After doing this, I get the following error:
libvirt.libvirtError: POST operation failed: xend_post: error from xen
daemon: (xend.err "Error creating domain: VM name already in use by domain
4")
I think you must at least change the UUID (/domain/uuid) and name
(/domain/name) in the XML description. Very like you also need to duplicate
the used disk images and update their paths
(/domain/devices/disk/source/@file) accordingly, unless you really want your
domians to share them.
BYtE
Philipp Hahn
--
Philipp Hahn Open Source Software Engineer hahn(a)univention.de
Univention GmbH Linux for Your Business fon: +49 421 22 232- 0
Mary-Somerville-Str.1 28359 Bremen fax: +49 421 22 232-99
http://www.univention.de
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Stand 110 in Halle 7.2A
5:45 a.m.
On Thu, Jun 10, 2010 at 10:58:54AM +0200, Philipp Hahn wrote:
Hello,
Am Donnerstag 10 Juni 2010 10:28:15 schrieb IKI-サガル バルウェ:
> 1. Get the XML Desc of the source Domain using "virDomainGetXMLDesc".
> 2. Get the Hypervisor Object for the source Domain using
> "virDomainGetConnect".
> 3. Create a new Domain using the "virDomainCreateXML" method.
>
> After doing this, I get the following error:
>
> libvirt.libvirtError: POST operation failed: xend_post: error from xen
> daemon: (xend.err "Error creating domain: VM name already in use by domain
> 4")
I think you must at least change the UUID (/domain/uuid) and name
(/domain/name) in the XML description. Very like you also need to duplicate
the used disk images and update their paths
(/domain/devices/disk/source/@file) accordingly, unless you really want your
domians to share them.
Better yet use the 'virt-clone' command line tool, or virt-manager's clone
capability
Daniel
--
|: Red Hat, Engineering, London -o- http://people.redhat.com/berrange/ :|
|: http://libvirt.org -o- http://virt-manager.org -o- http://deltacloud.org :|
|: http://autobuild.org -o- http://search.cpan.org/~danberr/ :|
|: GnuPG: 7D3B9505 -o- F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 :|
8:22 p.m.
Thanks Daniel,
> I think you must at least change the UUID (/domain/uuid) and
name
> (/domain/name) in the XML description. Very like you also need to
> duplicate
> the used disk images and update their paths
> (/domain/devices/disk/source/@file) accordingly, unless you really want
> your
> domians to share them.
I will definately try this out. As for changing the UUID, I think the new
value has to be unique in terms of all other Domains present. I am right??
Better yet use the 'virt-clone' command line tool, or
virt-manager's clone
capability
As for using 'virt-clone', is there a way to implement this using python
bindings for libvirt??
I want to provide the functionality in a python script.
I thought of doing this by directly executing the command line 'virt-clone'
command from my python script and check wheather it executes successfully or
not. We can do this by the 'os.system' function in python.
Thanks and Regards
Sagar Barve
----- Original Message -----
From: "Daniel P. Berrange" <berrange(a)redhat.com>
To: "Philipp Hahn" <hahn(a)univention.de>
Cc: <libvir-list(a)redhat.com>
Sent: Thursday, June 10, 2010 7:45 PM
Subject: Re: [libvirt] Create a copy of a Domain
> On Thu, Jun 10, 2010 at 10:58:54AM +0200, Philipp Hahn wrote:
>> Hello,
>>
>> Am Donnerstag 10 Juni 2010 10:28:15 schrieb IKI-サガル バルウェ:
>> > 1. Get the XML Desc of the source Domain using
"virDomainGetXMLDesc".
>> > 2. Get the Hypervisor Object for the source Domain using
>> > "virDomainGetConnect".
>> > 3. Create a new Domain using the "virDomainCreateXML" method.
>> >
>> > After doing this, I get the following error:
>> >
>> > libvirt.libvirtError: POST operation failed: xend_post: error from xen
>> > daemon: (xend.err "Error creating domain: VM name already in use by
>> > domain
>> > 4")
>>
> I think you must at least change the UUID (/domain/uuid) and
name
> (/domain/name) in the XML description. Very like you also need to
> duplicate
> the used disk images and update their paths
> (/domain/devices/disk/source/@file) accordingly, unless you really want
> your
> domians to share them.
>
Better yet use the 'virt-clone' command line tool, or
virt-manager's clone
capability
>
> Daniel
> --
> |: Red Hat, Engineering, London -o-
> http://people.redhat.com/berrange/ :|
> |: http://libvirt.org -o- http://virt-manager.org -o-
> http://deltacloud.org :|
> |: http://autobuild.org -o-
> http://search.cpan.org/~danberr/ :|
> |: GnuPG: 7D3B9505 -o- F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B
> 9505 :|
>
> --
> libvir-list mailing list
> libvir-list(a)redhat.com
> https://www.redhat.com/mailman/listinfo/libvir-list
4:32 a.m.
On Fri, Jun 11, 2010 at 10:22:18AM +0900, IKI-サガル バルウェ wrote:
Thanks Daniel,
>>I think you must at least change the UUID (/domain/uuid) and name
>>(/domain/name) in the XML description. Very like you also need to
>>duplicate
>>the used disk images and update their paths
>>(/domain/devices/disk/source/@file) accordingly, unless you really want
>>your
>>domians to share them.
I will definately try this out. As for changing the UUID, I think the new
value has to be unique in terms of all other Domains present. I am right??
>Better yet use the 'virt-clone' command line tool, or virt-manager's
clone
>capability
As for using 'virt-clone', is there a way to implement this using python
bindings for libvirt??
I want to provide the functionality in a python script.
I thought of doing this by directly executing the command line 'virt-clone'
command from my python script and check wheather it executes successfully
or not. We can do this by the 'os.system' function in python.
virt-clone is written in python itself and most of its code is in a
set of library modules, so you can call them directly if neccessary.
Or just write the equivalent code yourself using libvirt python, since
there isn't much too it
Daniel
--
|: Red Hat, Engineering, London -o- http://people.redhat.com/berrange/ :|
|: http://libvirt.org -o- http://virt-manager.org -o- http://deltacloud.org :|
|: http://autobuild.org -o- http://search.cpan.org/~danberr/ :|
|: GnuPG: 7D3B9505 -o- F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 :|
3 a.m.
Thanks Daniel,
virt-clone is written in python itself and most of its code is in a
set of library modules, so you can call them directly if neccessary.
Or just write the equivalent code yourself using libvirt python, since
there isn't much too it
I will take a look into the virt-clone python code.
As for your previous suggestion:
> >>I think you must at least change the UUID (/domain/uuid)
and name
> >>(/domain/name) in the XML description. Very like you also need to
> >>duplicate
> >>the used disk images and update their paths
> >>(/domain/devices/disk/source/@file) accordingly, unless you really want
> >>your
> >>domians to share them.
I tried this, i.e. assigned a new uuid, name and also created a new disk
image file and assigned the new path to the XML description.
Then tried to create a new VM using the "virDomainCreateXML" method passing
the updated XML Desc.
But I get the following error:
error : POST operation failed: xend_post: error from xen daemon: (xend.err
"Error creating domain: Boot loader didn't return any data!")
I searched about this error, and could not find anything I could understand.
Please help me with this.
Thanks and Regards
Sagar Barve
----- Original Message -----
From: "Daniel P. Berrange" <berrange(a)redhat.com>
To: "IKI-サガル バルウェ" <sagar.barve(a)ikic.co.jp>
Cc: "Philipp Hahn" <hahn(a)univention.de>; <libvir-list(a)redhat.com>
Sent: Friday, June 11, 2010 6:32 PM
Subject: Re: [libvirt] Create a copy of a Domain
> On Fri, Jun 11, 2010 at 10:22:18AM +0900, IKI-サガル バルウェ wrote:
>> Thanks Daniel,
>>
> >>I think you must at least change the UUID (/domain/uuid)
and name
> >>(/domain/name) in the XML description. Very like you also need to
> >>duplicate
> >>the used disk images and update their paths
> >>(/domain/devices/disk/source/@file) accordingly, unless you really want
> >>your
> >>domians to share them.
>>
>> I will definately try this out. As for changing the UUID, I think the new
>> value has to be unique in terms of all other Domains present. I am
>> right??
>>
>> >Better yet use the 'virt-clone' command line tool, or
virt-manager's
>> >clone
>> >capability
>>
>> As for using 'virt-clone', is there a way to implement this using python
>> bindings for libvirt??
>> I want to provide the functionality in a python script.
>> I thought of doing this by directly executing the command line
>> 'virt-clone'
>> command from my python script and check wheather it executes successfully
>> or not. We can do this by the 'os.system' function in python.
>
virt-clone is written in python itself and most of its code is in a
set of library modules, so you can call them directly if neccessary.
Or just write the equivalent code yourself using libvirt python, since
there isn't much too it
>
> Daniel
> --
> |: Red Hat, Engineering, London -o-
> http://people.redhat.com/berrange/ :|
> |: http://libvirt.org -o- http://virt-manager.org -o-
> http://deltacloud.org :|
> |: http://autobuild.org -o-
> http://search.cpan.org/~danberr/ :|
> |: GnuPG: 7D3B9505 -o- F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B
> 9505 :|
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5 comments
3 participants
participants (3)
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Daniel P. Berrange -
IKI-サガル バルウェ -
Philipp Hahn