Re: [Xen-API] Some questions about XenAPI

[Lonangel <lonangel@xxxxxxxxx>]

I installed the new XCP from xen.org and read the 
http://www.xen.org/files/XenCloud/sdk.pdf where it said to download the 
sdk image but i cant seem to find it.
Another thing is possible to make Xenclient work with XCP?


Dave Scott wrote:
> Hi,
>
>  
>
> The snapshot of XCP on xen.org includes a fairly recent xapi 
> development build, which contains the VM.revert call. Binary .isos and 
> sources are here:
>  
>
> http://www.xen.org/products/cloud_source.html
>
>  
>
> [ NB The development version of xapi will only work on XCP. At some 
> point in future a stable version will become part of the next XenServer. ]
>  
>
> Cheers,
>
> Dave
>
>  
>
> *From:* Lonangel [mailto:lonangel@xxxxxxxxx]
> *Sent:* 22 November 2009 20:43
> *To:* Dave Scott
> *Cc:* xen-api@xxxxxxxxxxxxxxxxxxx
> *Subject:* Re: [Xen-API] Some questions about XenAPI
>
>  
>
> Thanks for answering  so quickly.
>
> Dave Scott wrote:
>
> Hi,
>  
>   
>
>     Does anyone know if its possible to execute a command on a guest
>
>     through
>
>     the xenapi?
>
>     For example:
>
>     I want to test a group of programs written in java or c, the VM already
>
>     knows how to test this programs.
>
>     My main problem here is that i want to send data into the VM machine,
>
>     like the program file and start the command that evaluates those
>
>     programs, also get the output from the program.
>
>         
>
>  
> You cannot do this through the XenAPI currently. I recommend doing something like this:
>  
> 1. run a service inside your VM which accepts network connections; 
> 2. discover the VM's IP address via the XenAPI (VM_guest_metrics.networks map); 
> 3. connect to the service directly; and
> 4. transmit the command and receive the results via TCP/IP.
>  
> Would this work for you?
>  
>   
>
> I think that if it's the only way, for now it has to work. :)
>
>     The second problem is, I need to revert the VM back to its initial
>
>     state
>
>     ( clean all the damage the program might have done ) so it can be able
>
>     to test another program in the same conditions it tested the previous
>
>     program. The question is, can I revert a VM to a previous snapshot
>
>     using
>
>     the Xen API?
>
>         
>
>  
> Yes: use the call
>   VM.revert(session ref, VM ref)
> where 'VM ref' is an existing snapshot (disk snapshot) or checkpoint (disk + 
> memory snapshot)
>  
> Note that reverting to a checkpoint (disk + memory snapshot) will result in the VM being suspended. To make it run again you must call 'VM.resume'.
>  
> NB VM.revert is in the development version of xapi.
>  
> Hope that helps,
> Dave
>   
>
> How exactly can i get the development version of the Xapi and does it 
> work with Xenserver or only with XCP?
> Thank you

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