openstack-aps-package-dev team mailing list archive

[Andre Moruga <amoruga@xxxxxxxxxxxxx>]

Looks good to me, thanks Dmitry


From: Dmitry Savenkov [mailto:dsavenkov@xxxxxxxxxxxx]
Sent: Thursday, September 18, 2014 9:42 AM
To: Andre Moruga
Cc: openstack-aps-package-dev@xxxxxxxxxxxxxxxxxxx; Juan Victor Izquierdo; Evgeniya Shumakher
Subject: OpenStack APS - Excessive Resource Usage + Resellers & Supertenants

Andrey:

Following our recent meeting, I've put together the statement of the problem, which can be broken down into the following two parts:

1) OpenStackDeployment + Lack Of Resources:

Initial Data:

1.1) We have an OpenStack deployment (cluster) that was created by means of deploying a number of nodes (it's comprised of a set of control, compute, and storage nodes).
1.2) All the storage nodes have some RAM, CPU (cores), and Disk capacity. This physical capacity will be used by VMs once they are created/launched.
1.3) One physical CPU core could map to a number of virtual ones (say 1 physical core would enable the creation of 8 virtual ones)

Problem:

1) Figure out if it's possible to query the current resource utilization from an OpenStack cluser (all compute nodes) (Environment is the right OpenStack term) so that we can display it on the DataCenter statistics tab.
2) Investigate the possibility of catching/handling events having to do with the lack of resources (Once we have run out of CPU, RAM, or Disk Space, we need to take respective actions/alert the user).

Constraints:

Since KVM/libvirt may allow the user to create more virtual machines than the cluster can handle (in terms of memory/CPU/Disk), we may have to come up with some empirical formulae on average resource thresholds (CPU, RAM, Disk)

2) OpenStack APS + Resellers:

Statement of the Problem:

Find out if OpenStack enables the creation of a user that could be called 'SuperTenant'. In other words, that user would have privileges sufficient for him to connect to the main provider (as a reseller) and create subtenants that would belong to him, where some limited supertenant quota applies (all the subtenants cannot consume more resource than allocated).

That supertenant should have credentials enabling him to connect to a DataCenter and create those subtenants.

Andrey, please feel free to comment on whatever you want, correct something, add what is being missed.

This will be tackled tomorrow. The first point is being already discussed with some OpenStack specialists.

Thank you!

Kind Regards,
Dmitry.