[Haizea] Problems with VM lifecycle on OpenNebula+Haizea

[Nikola Milutinovic]

Borja Sotomayor wrote:
> Hi,
>
>   
>> PROBLEM 1
>> --------------
>> When we deploy a VM  with "onevm submit <path to the template>" and then
>> during its work shut it down or delete it, Haizea is not aware of this
>> change. The lease for that machine remains active and may prevent other VM
>> deployments.
>>     
>
> My reply to your previous message on the Haizea mailing list should
> address this problem. For those on the OpenNebula list, this is the
> message I'm referring to:
>
> https://mailman.cs.uchicago.edu/pipermail/haizea/2009-November/000084.html
>
>
>   
>> PROBLEM 2
>> --------------
>> When we deploy a machine as described above, and then do "stop" on it, via
>> XML-RPC (we have our own web GUI application), it gets saved. When we try to
>> resume that machine, it stays stuck in state "pending" and there is no
>> action that can revive it.
>>     
>
> How exactly are you trying to resume it? If you're using "onevm
> resume" and the machine still stays in a "pending" state, that sounds
> like an OpenNebula-only problem. For the OpenNebula developers to help
> out, I suggest you send this as a separate message and include the
> sequence of commands you used and the VM log (in
> $ONE_LOCATION/var/$VM_ID/vm.log)
>   

This is what I have in the log of the said machine (showing only the end 
of it):

Wed Nov 25 15:56:30 2009 [VMM][D]: Monitor Information:
        CPU   : 0
        Memory: 20
        Net_TX: -1
        Net_RX: -1
Wed Nov 25 15:56:47 2009 [LCM][I]: New VM state is SAVE_STOP
Wed Nov 25 15:57:39 2009 [LCM][I]: New VM state is EPILOG_STOP
Wed Nov 25 15:57:40 2009 [DiM][I]: New VM state is STOPPED
Wed Nov 25 16:00:15 2009 [DiM][I]: New VM state is PENDING.

This is what I am seeing on the "onevm list", the machine stays in the 
pending state, waiting for something to happen. I suspect that *that* 
something is a "go" from the scheduler. And since this is a VM from an 
already approved lease, Haizea has no reason to even pay attention to it.

>> But
>> take a look at Amazon, they will allow you to deploy a machine, run it at
>> certain times, turn it off, turn it on again and so forth. How does that fit
>> into Haizea's view of the world?
>>     
>
> In Haizea's view of the world, these would simply be separate leases,
> not a single lease that gets turned on and off. Reusing an existing
> image (instead of starting from a fresh one every time) should be
> possible, as long the OpenNebula template in subsequent submits refers
> to the saved copy of the image (although I've never tried this with
> OpenNebula+Haizea).

Well, this sounds promising. Not to mention interesting. :-)

> This is not to say that it wouldn't be more
> natural to have a model where a lease can be "restarted" in the
> future, without having to specify that a saved disk image must be used
> (instead, this would be implicit in the "restart" operation). However,
> doing this is not currently on our roadmap.
>   

Thanks for the info on that, too.

Nix.
-- 
Met vriendelijke groet / Kind regards,
Nikola Milutinovic
Sr Java Developer
Levi9 Global Sourcing
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