Open Stack

+1
________________________________________
From: Tim Bell [Tim.Bell at cern.ch]
Sent: Thursday, August 18, 2016 10:50 AM
To: Jonathan D. Proulx
Cc: openstack-operators at lists.openstack.org
Subject: Re: [Openstack-operators] Shelving

I was interested to establish a consensus that

- Shelved instances should not be part of the users quota
- Quota in Glance (and associated chargeback if appropriate) is needed

Glance space for us is much less expensive than people leaving their instances running. Equally, terminating a user’s inactive VM would not be popular so giving them a shelved instance would allow them to re-create it much more easily.

Any objections to a blueprint that proposes shelving should be handled with the same quota model as snapshotting ?

Tim

On 18/08/16 19:43, "Jonathan D. Proulx" <jon at csail.mit.edu> wrote:

    On Thu, Aug 18, 2016 at 03:24:28PM +0000, Tim Bell wrote:
    :
    :We’re having a look at VM shelving for the CERN community and struggling to find a motivation for a private cloud user to shelve their instances (and free up resources they may be only using infrequently).
    :
    :The problem is that shelved instances seem to still be included in the user’s quota. Without internal billing, the best motivation for users to shelve would be to allow them to maximize the use of their quota.
    :
    :Have any other sites used shelving extensively ? How did you motivate your users to shelve unused resources?


    Hi Tim,

    We've just started looking at this and for simialar reasons.  I agree
    we should remove shelved resources from project quota. Shelved
    instances do still hold some storage resources so there may need to be
    new quota to accoutn for that some how...

    Currently the only motivation for our users to shelve is to get me to
    stop pestering them.

    We're considering policy based enforced shelving (based on some yet to
    be defined utilization metrics) but that's only a idea at this point
    not a plan.

    -Jon


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