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Vilobh,

Thanks for advancing this important topic. I took a look at what Tim referenced how Nova is implementing nested quotas, and it seems to me that’s something we could fold in as well to our design. Do you agree?

Adrian

On Dec 14, 2015, at 10:22 PM, Tim Bell <tim.bell at cern.ch<mailto:tim.bell at cern.ch>> wrote:

Can we have nested project quotas in from the beginning ? Nested projects are in Keystone V3 from Kilo onwards and retrofitting this is hard work.

For details, see the Nova functions at https://review.openstack.org/#/c/242626/. Cinder now also has similar functions.

Tim

From: Vilobh Meshram [mailto:vilobhmeshram.openstack at gmail.com]
Sent: 15 December 2015 01:59
To: OpenStack Development Mailing List (not for usage questions) <openstack-dev at lists.openstack.org<mailto:openstack-dev at lists.openstack.org>>; OpenStack Mailing List (not for usage questions) <openstack at lists.openstack.org<mailto:openstack at lists.openstack.org>>
Subject: [openstack-dev] [openstack][magnum] Quota for Magnum Resources

Hi All,

Currently, it is possible to create unlimited number of resource like bay/pod/service/. In Magnum, there should be a limitation for user or project to create Magnum resource,
and the limitation should be configurable[1].

I proposed following design :-

1. Introduce new table magnum.quotas
+------------+--------------+------+-----+---------+----------------+
| Field      | Type         | Null | Key | Default | Extra          |
+------------+--------------+------+-----+---------+----------------+
| id         | int(11)      | NO   | PRI | NULL    | auto_increment |
| created_at | datetime     | YES  |     | NULL    |                |
| updated_at | datetime     | YES  |     | NULL    |                |
| deleted_at | datetime     | YES  |     | NULL    |                |
| project_id | varchar(255) | YES  | MUL | NULL    |                |
| resource   | varchar(255) | NO   |     | NULL    |                |
| hard_limit | int(11)      | YES  |     | NULL    |                |
| deleted    | int(11)      | YES  |     | NULL    |                |
+------------+--------------+------+-----+---------+----------------+
resource can be Bay, Pod, Containers, etc.

2. API controller for quota will be created to make sure basic CLI commands work.
quota-show, quota-delete, quota-create, quota-update
3. When the admin specifies a quota of X number of resources to be created the code should abide by that. For example if hard limit for Bay is 5 (i.e. a project can have maximum 5 Bay's) if a user in a project tries to exceed that hardlimit it won't be allowed. Similarly goes for other resources.
4. Please note the quota validation only works for resources created via Magnum. Could not think of a way that Magnum to know if a COE specific utilities created a resource in background. One way could be to see the difference between whats stored in magnum.quotas and the information of the actual resources created for a particular bay in k8s/COE.
5. Introduce a config variable to set quotas values.
If everyone agrees will start the changes by introducing quota restrictions on Bay creation.
Thoughts ??

-Vilobh
[1] https://blueprints.launchpad.net/magnum/+spec/resource-quota
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