[vbox-dev] trying to clone a vm

[Carlo Bongiovanni]

Hi Klaus,

I elaborated your last answer and tried a lot to find what was wrong in my
code. I also discovered that probably I also needed to lock the session
before cloning the machine and I tried doing it.. I finally got this code,
surrounded with try/catch that I avoid to paste here for semplicity:

            // find the machine to clone
            IMachine m_clone = vbox.findMachine(vmuid_clone);
            String m_clone_os = m_clone.getOSTypeId();
            // create a new machine with the provided name
            IMachine machine = vbox.createMachine(null, vmname, null,
m_clone_os, null);

            machine.saveSettings();
            vbox.registerMachine(machine);

            // lock the src machine
            session = mgr.getSessionObject();
            m_clone.lockMachine(session, LockType.Write);
            IMachine mutable = session.getMachine();

            // clone options
            CloneMode cm = CloneMode.MachineState;
            List<CloneOptions> cloneOptionsList = new
ArrayList<CloneOptions>();
            cloneOptionsList.add(CloneOptions.KeepAllMACs);

            // clone the machine
            IProgress p = machine.cloneTo(mutable, cm, cloneOptionsList);

            // get percent of cloning option
            log(p.getPercent());

            // wait
            p.waitForCompletion(-1);

            // get percent of cloning option
            log(p.getPercent());

            // unlock the src machine
            session.unlockMachine();

After the execution of this code, the p.getPercent() returns "50", and the
new machine is registered, but no disks are linked to it. Am I missing
something important?

Thanks for any feedback.
Best
Carlo




2013/7/15 Klaus Espenlaub <klaus.espenlaub at oracle.com>

> Hi Carlo,
>
> On 15.07.2013 10:01, Carlo Bongiovanni wrote:
> > Hi All,
> >
> > I am running VirtualBox 4.2.10 on Ubuntu 12.04.
> >
> > I am trying to clone a vm with the Java API. Doing this operation from
> > the console, I would issue the following command:
> > VBoxManage clonevm vmuid_src --name vmname_dest --register
> >
> > With Java I am doing the following:
> >
> >          IMachine m_clone = vbox.findMachine(vmuid_src);
> >          String m_clone_os = m_clone.getOSTypeId();
> >          IMachine machine = vbox.createMachine(null, vmname_dest, null,
> > m_clone_os, null);
> >          machine.saveSettings();
> >          vbox.registerMachine(machine);
> >
> >          CloneMode cm = CloneMode.MachineState;
> >          List<CloneOptions> cloneOptionsList = new
> > ArrayList<CloneOptions>();
> >          cloneOptionsList.add(CloneOptions.KeepAllMACs);
> >
> >          machine.cloneTo(m_clone, cm, cloneOptionsList);
> >
> > After the execution of this code, I found a new vm in the list, but
> > without any storage attached. What am I missing? Can you direct me to
> > the right way to do it? I couldn't understand it from the sdkref.
>
> Your code has to wait until the cloning has completed. The IProgress
> object isn't returned for fun, it serves an important purpose. Without
> it there's no good way to tell when the cloning has finished. It can
> take a very long time, as your code creates a full clone which
> potentially means copying many GBytes of virtual disk contents. Only at
> the end of the VM cloning the settings are all in place...
>
> The best "sample" is always the source of VBoxManage - it's C++, but the
> API works in principle the same in all languages, with minor differences
> in the error handling and thus details of the parameter list.
>
> Klaus
> >
> > Thanks, best
> > Carlo
>
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>



-- 
Carlo Bongiovanni

Tel. +49 173 9714421
callto://pacman81
gtalk: carlo.bongiovanni
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