Re: Driver ESX

CÃdric Penas <cedric.penas@xxxxxxxx> · Fri, 18 Feb 2011 15:42:02 +0100

    Le 18. 02.
      11 14:11, Matthias Bolte a ÃcritÂ:

      2011/2/18 CÃdric Penas <cedric.penas@xxxxxxxx>:

        Hi,

I am currently working on a project where I must develop a function to clone
domain for the driver ESX.
I immediately saw that the function cloneVM_Task () from VMware API was not
supported for standalone ESX.

      Do you mean that the ESX driver doesn't use CloneVM_Task() or that the
ESX server returns an NotImplemented fault for a call to
CloneVM_Task()?

      I tried to use CloneVM_Task() but the ESX server
          returns the following error:

          NotSupported

    It
        seems that we should have
        "vCenter" to
          use this function.

        Does anyone know the best way to still implement this function or a
workaround ?
Why is it not already implemented ?

      It's not implemented in libvirt, because libvirt doesn't have a
virDomainClone() function, so there is no way for the ESX driver to
use CloneVM_Task().

The virt-clone tool uses several libvirt functions to perform a clone
operation. The basics steps are:

- get the domain XML description of the domain to clone
- determine the storage volumes to clone
- issue a virStorageVolCreateXMLFrom() for each storage volume to be cloned
- update the storage volume references in the domain XML description;
remove the uuid and mac addresses to get new ones
- define a new domain from the edited domain XML description

You should be able to implement a clone operation for ESX on top of
libvirt without the need to change libvirt.

Or try to use virt-clone for ESX. IIRC virt-clone currently doesn't
handle the VMware path format properly so it might need some tweaks.

Matthias

    Yes
        I know this is
        not implemented and
        that is what I
        would to do.

        Now, I created
        a function virDomainClone
        () in Libvirt
        and I have
          implemented the function only for
        ESX driver.
        This function creates a
          new directory, copies
        the virtualdisk
        of the source domain
        in this new directory and creates
        the VM cloned
        from this virtualdisk.

        Your proposal seems
        better but what
        is the difference ?
        Would you have a link
        to documentations about the XML
        description because I've
          never used it.

        Sorry if
        my questions are
      stupids and thank you
        for your answers;)

        CÃdric

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