[one-users] the synchronous problem between the cancel operation and tm_delete.sh for lxc driver

Ruben S. Montero rsmontero at opennebula.org
Thu Dec 6 10:48:39 PST 2012


It seems that this behavior is problematic. Let me elaborate on Simon
comment. As pointed out by Simon there are two similar VM operations:

* delete, this is equivalent to kill -9 It is a hard kill of the VM.
It does not check anything and trigger cancellation/delete actions to
free the associated resources. It is supposed to be used when a VM is
stuck in any state.

* cancel, it cancels the VM and cleans the resources but checks and
synchro is in place.

Note that this synchronization problem is only for VM's in running.

This seems to be confusing, we are thinking of moving the delete
operation to the ADMIN set (so you need admin permissions to delete)
and so force users to use the safer cancel operation... Any thoughts?


On Thu, Dec 6, 2012 at 2:44 PM, Simon Boulet <simon at nostalgeek.com> wrote:
> Hi,
> On Wed, Dec 5, 2012 at 11:39 PM, cmcc.dylan <dx10years at 126.com> wrote:
>> Hi, everyone!
>>     I'm develpment lxc driver for opennebula and i complete the basic
>> functions now, but i meet a problem as follows.
>>     from the log, we can see opennbula execute "cancel" fistrly  and then
>> execute "tm_delete.sh", But the result is  cancel: Executed "virsh --connect
>> lxc:/// destroy lxc-5". after "tm_delete.sh".
> I can confirm this behaviour too when sending the delete action to a VM. It
> seems the VMM cancel and the TM delete actions are executed simultaneously
> by OpenNebula. When sending the cancel action OpenNebula seems to properly
> wait for the VMM cancel action to complete before calling TM delete.
> Simon
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Ruben S. Montero, PhD
Project co-Lead and Chief Architect
OpenNebula - The Open Source Solution for Data Center Virtualization
www.OpenNebula.org | rsmontero at opennebula.org | @OpenNebula

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