Hi Xianqing,

Right I think the snapshot method might be the best way to go. It
would allow a quick way to clone with doing a full copy.
Aaron

On Mon, Aug 15, 2011 at 5:02 PM, Xianqing Yu <yu267155...@hotmail.com> wrote:
> Aaron,
>
> Libvirt currently don't have support for non-persistent disk. I sent email
> to libvirt mail list to ask, and according to Eric Blake said, he is working
> on that now, and it may be included in libvirt 0.9.5.
>
> I also take a look at qemu-kvm API. It support non-persistent disk. I can
> use command "qemu-kvm -snapshot......" to make it work.
>
> For now, I think we have to choose, either use libvirt without
> non-persistent disk support, or use qemu-kvm API.
>
> Thanks,
>
> Xianqing Yu
>
> ------
> Graduate Research Assistant, Cyber Defense Lab
> Department of Computer Science
> North Carolina State University, Raleigh, NC
> E-mail: x...@ncsu.edu
>
> -----Original Message----- From: Aaron Peeler
> Sent: Wednesday, August 10, 2011 04:01 PM
> To: vcl-dev@incubator.apache.org
> Subject: Re: The New KVM Provisioning module
>
> Xianqing,
>
> I've started reviewing the code and have a couple of questions. Please
> take this as constructive, I'm excited to get the kvm development
> started, but would like take a lot of the lessons we've learned from
> some of the previous provisioning modules to get libvirt prov module
> on the right path.
>
> In your load routine it looks like your having to copy the img and
> vmdk files before starting the vm, was this intended or could it have
> been something leftover from another template. This will be very slow
> before vcld would get to the point of starting a vm, some those files
> can be very large.
>
> With the vmdk's under VMware/VMware.pm we run in non-persistent mode
> and for image captures started using snapshots in the development
> code. I'm pretty sure you can do something similar with kvm.
>
> Do you know of or have you tested another method in running vms a sort
> of non-persistent mode under kvm? Copying a large .vmdk or .img file
> on each provisioning request will not work very well in the long-term.
>
> By chance did you have time to look at the
> lib/VCL/Module/Provisioning/VMware/VMware.pm framework?
> Ideally we'd like to build a similar framework for libvirt.
>
> Thanks,
> Aaron
>
>
>
> On Thu, Aug 4, 2011 at 1:34 PM, Aaron Peeler <aaron_pee...@ncsu.edu> wrote:
>>
>> This is great. I'll try to have some more useful comments soon. :)
>> Thanks Xianqing.
>>
>> Aaron
>>
>> On Thu, Aug 4, 2011 at 11:11 AM, Xianqing Yu <yu267155...@hotmail.com>
>> wrote:
>>>
>>> Hi VCL community,
>>>
>>> Sorry for the typo in previous email.
>>>
>>> I finish the new version of KVM provision module for VCL 2.2.1. I upload
>>> the
>>> kvm.pm code to VCL JIRE. Please take a look at my code and let me know
>>> what
>>> do you feel about it. The link is,
>>>
>>> https://issues.apache.org/jira/browse/VCL-339
>>>
>>> Generally, the new version of KVM module contain these features,
>>>
>>> 1. The module will use libvirt API to manipulate the VM on KVM hosts. The
>>> main reason behind this is that libvirt is widely used API, many people
>>> in
>>> the community talked about this before, and libvirt support for different
>>> hypervisors, such as KVM, Xen, Qemu, etc.. It would be easier to port
>>> this
>>> module to support other hypervisor in future.
>>>
>>> 2. An setup script can help the users to setup KVM host much easier. The
>>> attachment named kvmsetup is the script. I tested it on Fedora 9.
>>> Basically,
>>> user need to install Fedora 9 (or use XCAT to install Fedora 9 on blade
>>> automatically) and run the script as the root user.
>>>
>>> 3. Users don't have to use qemu-ifup and mac script. "qemu-ifup" is not
>>> needed because of using lib-virt and "mac" is now included in kvm.pm. So
>>> kvm.pm is the only file you need to add to VCL Management Machine.
>>>
>>> 4. Both "-flat.vmdk" and "img" image format are supported. So now both
>>> KVM
>>> image and VMware ESXi image (flat.vmdk) can be provisioned on KVM host.
>>>
>>> 5. Misc code updated.
>>>
>>>
>>> Thanks,
>>>
>>> Xianqing
>>> -----Original Message----- From: Andy Kurth
>>> Sent: Wednesday, August 03, 2011 02:14 PM
>>> To: vcl-dev@incubator.apache.org
>>> Subject: Re: The New KVM Provisioning module
>>>
>>> $self->data->get_image_os_install_type() should do it.
>>>
>>> On Wed, Aug 3, 2011 at 12:47 PM, Xianqing Yu <yu267155...@hotmail.com>
>>> wrote:
>>>>
>>>> A quick question, do you know any function call can get OSinstalltype
>>>> content for the target image?
>>>>
>>>> Thanks,
>>>>
>>>> Xianqing Yu
>>>>
>>>> ------
>>>> Graduate Research Assistant, Cyber Defense Lab
>>>> Department of Computer Science
>>>> North Carolina State University, Raleigh, NC
>>>> E-mail: x...@ncsu.edu
>>>>
>>>> -----Original Message----- From: Andy Kurth
>>>> Sent: Wednesday, August 03, 2011 09:38 AM
>>>> To: vcl-dev@incubator.apache.org
>>>> Subject: Re: The New KVM Provisioning module
>>>>
>>>> I agree that entries should be added to OSinstalltype.  I wouldn't
>>>> include the 'kvm' hypervisor name in the name since the same type may
>>>> be used by multiple hypervisors.  The 'vmware' entry can probably be
>>>> renamed to 'vmdk' and then used by both VMware and KVM.  An entry can
>>>> be added named something like 'img' or 'vm-img'.
>>>>
>>>> On Tue, Aug 2, 2011 at 5:00 PM, Xianqing Yu <yu267155...@hotmail.com>
>>>> wrote:
>>>>>
>>>>> I think it is possible to handle both types: vmdk and img. I believe
>>>>> that
>>>>> in
>>>>> my kvm provisioning code, the code need some conditions to decide if
>>>>> image
>>>>> file is vmdk file or img file. For example, We can add "kvm-img" and
>>>>> "kvm-vmware" into OSinstalltype table. If one image's OS module point
>>>>> to
>>>>> "kvm-img" as OSinstalltype, then the code should consider the image as
>>>>> "img"
>>>>> image file, and vice verse.
>>>>>
>>>>> Thanks,
>>>>>
>>>>> Xianqing Yu
>>>>>
>>>>> ------
>>>>> Graduate Research Assistant, Cyber Defense Lab
>>>>> Department of Computer Science
>>>>> North Carolina State University, Raleigh, NC
>>>>> E-mail: x...@ncsu.edu
>>>>> -----Original Message----- From: Aaron Peeler
>>>>> Sent: Tuesday, August 02, 2011 02:39 PM
>>>>> To: vcl-dev@incubator.apache.org
>>>>> Subject: Re: The New KVM Provisioning module
>>>>>
>>>>> The imagename is related to the OS table. It's also dependent on the
>>>>> the OS.moduleid, OS.installtype and the computer.provisioningid. We
>>>>> might need to add new entries for this module, which isn't a problem.
>>>>> Just need to decide on how to name it.
>>>>>
>>>>> Ideally I would like to see the libvirt/kvm module handle both types -
>>>>> vmdk and img.
>>>>>
>>>>> Aaron
>>>>>
>>>>>
>>>>> On Mon, Aug 1, 2011 at 11:13 AM, Xianqing Yu <yu267155...@hotmail.com>
>>>>> wrote:
>>>>>>
>>>>>> Thanks for your suggestion.
>>>>>>
>>>>>> I have a question about define the image name and capture function.
>>>>>> Currently my kvm module can support vmware esxi image format (.vmdk
>>>>>> and
>>>>>> flat.vmdk, so I can easily support existing flat.vmdk images by KVM).
>>>>>> But
>>>>>> I
>>>>>> also want it to support other image formats, such as .img.
>>>>>>
>>>>>> I think we may need to define the name format both in VCL database and
>>>>>> KVM
>>>>>> module. Let's said there is an image named CentOS5,
>>>>>>
>>>>>> In VMDK format,
>>>>>> In VCL database, it should be esx-CentOS5-v0,
>>>>>> In image library, it should be files, esx-CentOS5-v0.vmdk and
>>>>>> esx-CentOS5-v0-flat.vmdk.
>>>>>>
>>>>>> My question is that what its name should be when the image file is img
>>>>>> format? My final goal is that make KVM module can support flat.vmdk
>>>>>> and
>>>>>> img
>>>>>> file at the same time. Is that possible to do that? Or I should give
>>>>>> one
>>>>>> of
>>>>>> them up?
>>>>>>
>>>>>> Thanks,
>>>>>>
>>>>>> Xianqing Yu
>>>>>>
>>>>>> ------
>>>>>> Graduate Research Assistant, Cyber Defense Lab
>>>>>> Department of Computer Science
>>>>>> North Carolina State University, Raleigh, NC
>>>>>> E-mail: x...@ncsu.edu
>>>>>> -----Original Message----- From: Andy Kurth
>>>>>> Sent: Monday, August 01, 2011 09:02 AM
>>>>>> To: vcl-dev@incubator.apache.org
>>>>>> Subject: Re: The New KVM Provisioning module
>>>>>>
>>>>>> Hi Xianqing,
>>>>>> Sounds great.  I'd like to help with this too.  I like the idea about
>>>>>> making it generic.  Since libvirt supports a few different things, I
>>>>>> think a very generic libvirt.pm module inheriting from Provisioning.pm
>>>>>> makes sense:
>>>>>> Package: VCL::Module::Provisioning::libvirt
>>>>>> File: /usr/local/vcl/lib/VCL/Module/Provisioning/libvirt.pm
>>>>>>
>>>>>> I'd create a Provisioning/libvirt subdirectory, and create .pm files
>>>>>> for each libvirt/VCL supported product:
>>>>>> Package: VCL::Module::Provisioning::libvirt::KVM
>>>>>> File: /usr/local/vcl/lib/VCL/Module/Provisioning/libvirt/KVM.pm
>>>>>>
>>>>>> I agree to use the VMware module as an example though there will be a
>>>>>> difference in how your Perl package path is constructed and where the
>>>>>> files reside.  The main VMware.pm file should reside 1 directory
>>>>>> higher, directly under Provisioning.  When the new VMware.pm module
>>>>>> was created, the older vmware.pm module already resided in this
>>>>>> location.  We couldn't remove it at that time so I put VMware.pm a
>>>>>> directory lower to keep them straight.
>>>>>>
>>>>>> There is a lot of code in the VMware.pm module that could be reused by
>>>>>> other modules.  I tried to break up the subroutines as much as
>>>>>> possible so that each one performs a single function.  Many of them
>>>>>> are not VMware-specific and could be moved up into Provisioning.pm so
>>>>>> that the code can be reused by libvirt.pm and other provisioning
>>>>>> modules.
>>>>>>
>>>>>> Submitting your code via Jira is the best way to get started.  We
>>>>>> already have issue VCL-339 for this.  Please be sure to submit your
>>>>>> code as an attached file to the issue, not copied/pasted to the
>>>>>> description.
>>>>>>
>>>>>> Also, 1 suggestion for anyone working on code.  Make sure you are
>>>>>> developing using a checked-out copy of trunk from Subversion and
>>>>>> perform a 'svn update' regularly.  Don't work off of the code in the
>>>>>> VCL 2.2.1 release because it is changing frequently.  It will also be
>>>>>> very easy to commit your code to trunk this way.
>>>>>>
>>>>>> Thanks,
>>>>>> Andy
>>>>>>
>>>>>> On Fri, Jul 29, 2011 at 4:30 PM, Xianqing Yu <xia...@us.ibm.com>
>>>>>> wrote:
>>>>>>>
>>>>>>> Aaron,
>>>>>>>
>>>>>>> Thank your interesting.
>>>>>>>
>>>>>>> I looked at the vmware Provisioning module code, and try to learn and
>>>>>>> reuse some code from that. Because there are some many functions in
>>>>>>> VMware.pm, I probably start with some basic functions, and make it
>>>>>>> work
>>>>>>> first.
>>>>>>>
>>>>>>> About structure, I has several functions inside my kvm.pm, including,
>>>>>>> initialize, load, capture, node_status and get_image_size. I already
>>>>>>> finish
>>>>>>> most of them except for capture function. So basically, kvm module
>>>>>>> will
>>>>>>> do
>>>>>>> very similar thing as VMware.pm. And it generates a XML file to
>>>>>>> define
>>>>>>> the
>>>>>>> VM (like VMX file in VMware) and creates VM on KVM by sending ssh
>>>>>>> command
>>>>>>> "virsh create vm.xml". I have a script which can install necessary
>>>>>>> packages
>>>>>>> and set up proper network configuration on the host. So I can use
>>>>>>> that
>>>>>>> with
>>>>>>> xCAT to create kickstart image for KVM host. I also can use the
>>>>>>> script
>>>>>>> to
>>>>>>> configure existing Fedora machine.
>>>>>>>
>>>>>>> I can have my script and kvm provisioning code ready within three
>>>>>>> days,
>>>>>>> so
>>>>>>> you guys can take a look. So should I publish it on the JIRE?
>>>>>>>
>>>>>>> Thanks,
>>>>>>>
>>>>>>> Xianqing Yu
>>>>>>>
>>>>>>> WSTI Intern
>>>>>>> xia...@us.ibm.com
>>>>>>>
>>>>>>> -----Aaron Peeler <fapee...@ncsu.edu> wrote: -----
>>>>>>>
>>>>>>>  To: vcl-dev@incubator.apache.org
>>>>>>>  From: Aaron Peeler <fapee...@ncsu.edu>
>>>>>>>  Date: 07/29/2011 08:58AM
>>>>>>>  Subject: Re: The New KVM Provisioning module
>>>>>>>
>>>>>>>  Hi Xianqing,
>>>>>>>
>>>>>>>  This is great. I'd like to work with you this module.
>>>>>>>
>>>>>>>  What are your thoughts on the structure?
>>>>>>>
>>>>>>>  Have you looked at the work Andy did on the VMware Prov module:
>>>>>>>  /..../lib/VCL/Module/Provisioning/VMware
>>>>>>>
>>>>>>>
>>>>>>>  Aaron
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>  On Tue, Jul 26, 2011 at 11:18 PM, Xianqing Yu <xia...@us.ibm.com>
>>>>>>> wrote:
>>>>>>>  >
>>>>>>>  >
>>>>>>>  >
>>>>>>>  > Hi VCL community,
>>>>>>>  >
>>>>>>>  > I am developing KVM Provisioning Module for VCL system, which is
>>>>>>> based
>>>>>>> on
>>>>>>>  > my previous version of KVM Provisioning Module. You can find out
>>>>>>> my
>>>>>>>  > previous KVM module's information from here,
>>>>>>>  > https://issues.apache.org/jira/browse/VCL-339
>>>>>>>  >
>>>>>>>  > Currently, I am trying to make this module's code as generic as
>>>>>>> possible.
>>>>>>>  > And I will including these features inside this new version of
>>>>>>> module.
>>>>>>>  > 1. The module will use libvirt API to manipulate the VM on KVM
>>>>>>> hosts.
>>>>>>> The
>>>>>>>  > main reason behind this is that libvirt is widely used API, many
>>>>>>> people in
>>>>>>>  > the community talked about this before, and libvirt support for
>>>>>>> different
>>>>>>>  > hypervisors, such as KVM, Xen, Qemu, etc.. It would be easier to
>>>>>>> port
>>>>>>> this
>>>>>>>  > module to support other hypervisor in future.
>>>>>>>  > 2. A setup scripted will be developed to help the users to setup
>>>>>>> host
>>>>>>> much
>>>>>>>  > easier.
>>>>>>>  > 3. A document descripts how to install this module.
>>>>>>>  >
>>>>>>>  > Welcome everyone to join the discussion with me if you are
>>>>>>> interesting
>>>>>>>  > about. Such as, is there any new features you expect to see in
>>>>>>> this
>>>>>>> module?
>>>>>>>  > Do you have any suggestion about this module? Or you have any
>>>>>>> questions
>>>>>>>  > about this module? Please let me know.
>>>>>>>  >
>>>>>>>  > Thanks,
>>>>>>>  >
>>>>>>>  > Xianqing Yu
>>>>>>>  > WSTI Intern
>>>>>>>  > xia...@us.ibm.com
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>  --
>>>>>>>  Aaron Peeler
>>>>>>>  Program Manager
>>>>>>>  Virtual Computing Lab
>>>>>>>  NC State University
>>>>>>>
>>>>>>>  All electronic mail messages in connection with State business which
>>>>>>>  are sent to or received by this account are subject to the NC Public
>>>>>>>  Records Law and may be disclosed to third parties.
>>>>>>
>>>>>>
>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> Aaron Peeler
>>>>> Program Manager
>>>>> Virtual Computing Lab
>>>>> NC State University
>>>>>
>>>>> All electronic mail messages in connection with State business which
>>>>> are sent to or received by this account are subject to the NC Public
>>>>> Records Law and may be disclosed to third parties.
>>>>>
>>>>
>>>>
>>>
>>>
>>
>>
>>
>> --
>> Aaron Peeler
>> Program Manager
>> Virtual Computing Lab
>> NC State University
>>
>> All electronic mail messages in connection with State business which
>> are sent to or received by this account are subject to the NC Public
>> Records Law and may be disclosed to third parties.
>>
>
>
>
> --
> Aaron Peeler
> Program Manager
> Virtual Computing Lab
> NC State University
>
> All electronic mail messages in connection with State business which
> are sent to or received by this account are subject to the NC Public
> Records Law and may be disclosed to third parties.
>



-- 
Aaron Peeler
Program Manager
Virtual Computing Lab
NC State University

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