[ovirt-devel] Enabling quota on existing VM-disk, undefined behavior

[David Maroshi]

Greetings team,

I wish to open for discussion the design session I am facing.
I reported a bug on this issue here: https://bugzilla.redhat.com/show_bug.cgi?id=1245931


Initial state:
--------------
Operating and data center, with one or more running VM.
Each VM has one or more attached VM-disk.
Quota is disabled.

Change to data center configuration:
------------------------------------
Enable (audit or enforce) quota on the data center.
Create 2 or more quota constraints.

Problem occurrence
------------------
1. Editing existing VM-disk.
   The VM-disk is assigned the first arbitrary quota constraints, in the list box.
   If the user is not mindful, the quota selection is incorrect.
2. Creating new VM-disk
   The VM-disk is assigned the first arbitrary quota constraints, in the list box.
   If the user is not mindful, the quota selection is incorrect.

For discussion:
---------------
1. Define a policy for setting the default quota constraint, on new disk.
                                                                ^^^
2. Define a policy for setting the default quota constraint, on existing disks (prior to enabling quota on data center).
                                                                ^^^^^^^^
3. Define a policy for restoring/resetting quota constraint, on existing disks (after re-enabling quota on data center).
                       ^^^^^^^^^^^^^^^^^^^

Your comments are appreciated.

Joy and happiness
Dudi

-- 
Dudi Maroshi
Software Engineer
Red Hat Enterprise Virtualization project http://www.redhat.com/en/technologies/virtualization
maroshi at redhat.com
--------------------------------
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"There is only one absolute truth, and that is: there in no one absolute truth."