Why is an Pool (type Manual) stateless

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Hy,

 

We have RHEV 3.1

We have implemented an Type autometic pool and an type Manual Pool.

When an user log in to the automatic pool it will start an stateless VM. That can untstand why this is done.

But when an user log in to an manual pool. The VM is set to this user. But the VM will start in an stateless mode. This mean the machine will revert to the preveus state.

So there is an litle diverence between automatic and manual.

Why??????

ie
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Responses

DY Guru 5340 points
15 February 2013 8:56 AM

Should not be happening, a manual pool is persistent, while the automatic pool is not. Please open a support case and provide logs, 

ie Active Contributor 180 points
15 February 2013 9:37 AM

I go try that thanks

ie Active Contributor 180 points
18 February 2013 8:25 AM

I have tried several times.

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Do they have an e-mail adress?

VP Expert 823 points
18 February 2013 9:07 AM

Dan, I don't understand. The manual says:

"Virtual machines in pools are stateless, data is not persistent across reboots."

https://access.redhat.com/knowledge/docs/en-US/Red_Hat_Enterprise_Virtualization/3.1/html/Administration_Guide/chap-Pools.html

 

"Manual - The administrator is responsible for explicitly returning the virtual machine to the pool. The virtual machine reverts to the original base image after the administrator returns it to the pool."

https://access.redhat.com/knowledge/docs/en-US/Red_Hat_Enterprise_Virtualization/3.1/html/Administration_Guide/sect-Virtual_Machine_Pool_Tasks.html

 

Is the manual wrong?

VP Expert 823 points
18 February 2013 10:47 AM

I'm not sure if the statement (at 00:53) in this RHEV3.0 video also applies to RHEV3.1:

https://access.redhat.com/knowledge/videos/214683

 

But if it does, the video says: a manual pool vm is only given back to the pool if the admin deletes the vm.

You can't delete a vm that is attached to a (manual) pool... What did the video meant to say?

 

But still, the manual says:

"Virtual machines in pools are stateless, data is not persistent across reboots."

https://access.redhat.com/knowledge/docs/en-US/Red_Hat_Enterprise_Virtualization/3.1/html/Administration_Guide/chap-Pools.html#Pools

 

Maybe the documentation needs an update:

"Virtual machines in automatic pools are stateless, data is not persistent across reboots."

ie Active Contributor 180 points
18 February 2013 2:12 PM

When i read the manual:

It states that the VM returns the base state after the admin removes the user from the VM.

And that is what is happening here. This morging i saw that there was an snapshot from feb 15, 2013 on the VM.  WHen yhe user is removed from the VM the snapshot is removed. So this is working as mentioned.

 

But there is an new problem when login to the user portal an start an VM from an Manual pool. The VM is connected to the user and starts-up. After succesfull shutdown the machine isn't comming Up again. In the event screen I get the following error:

Failed to start VM VLK106-1, because exist snapshot for stateless state. Snapshot will be deleted

 

Anyone an idea

David Powles's picture Red Hat 25369 points
19 February 2013 11:47 AM

Are you still encountering an error while trying to open a support case?

VP Expert 823 points
19 February 2013 12:50 PM

Yes they are.

 

We opened a case via our account about it:

https://access.redhat.com/support/cases/00792248

 

They have a case too, but the case can't be viewed (Ooops error messages all the time)

https://access.redhat.com/support/cases/00792241

David Powles's picture Red Hat 25369 points
20 February 2013 8:51 AM

Ok, thanks for letting me know. I'll ask someone to look into this.

ia Active Contributor 210 points
22 March 2013 7:04 AM

Update on the support call:

The Support center filed a bugzilla as this issue is generic & always reproducible .

Bug 923182 - VMs from manual pool cannot be started after shutdown

This bug is internal , hence I wont be able to view it.

I will keep you updated.

 

Bart

 

Update:

The bug will be fixed in version rhev 3.2

David Powles's picture Red Hat 25369 points
25 March 2013 12:23 PM

Great. Thanks for keeping us updated!

ls Pro 452 points
28 April 2013 9:11 AM

in the manual pool the changes does not revert back to the virtual machine but in the automatic pool when the user logs out of the virtual machine the changes revert back to the state it was created 

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