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• Launchpad Entry: NovaSpec:nova-notifications
• Created: 28 Sep 2011
• Contributors: Juan Lebrijo

Summary

Nova administrators want data on system usage for billing, chargeback, or monitoring purposes.

Release Note

This paper is based on "System Usage Data" http://wiki.openstack.org/SystemUsageData implemented for Essex realease.

We are planning to implement this features for Folsom

Rationale

The best way to gather this data is from a notifications system based on AMQP queues (RabbitMQ messaging System).

Then the main challenge of this BluePrint is to define the most useful events to be transmitted from OpenStack subsystems to AMQP queues. In order to be consumed by billing, chargeback or monitoring systems.

User stories

# As a systems integrator, I need to retrieve usage data so that I can properly bill my customers.
# As a systems integrator or enterprise cloud administrator, I want to monitor usage data over time so that I can optimize the utilization of my resources.
# As a systems integrator, I need to provide usage data to multiple third-party systems without building custom interfaces to each one so that I can efficiently utilize my manpower.

Design

There are two events generated for every activity <activity>.start and <activity>.end. The "start" one specifies the beginning of the activity, and the "end" one specifies the success of the activity.

The Events resources are the objects in the platform that we are interested to scan:

• Instances
• * Memory increase/decrease
• * Disk increase/decrease
• * Image mounted
• * BW consumed
• Volumes
• * Created/deleted
• * Attached/detached
• Images:
• * Created/Deleted
• Floating IPs
• * Associated/dissasociated (to an instance)
• * Allocated/released (by a user/tenant)
• Snapshots
• Fixed Networks
• Tenants
• Users
• Inbound traffic
• Outbound traffic

Implementation

Event Types

Type

Resource

| compute.instance.create.start/.end \*\* | Instance | Usage notification upon creation of a new instance | | compute.instance.delete.start/.end *\* | Instance | Usage notification upon deletion of an instance | | compute.instance.rebuild.start/.end *\* | Instance | Usage notification upon rebuild of instance | | compute.instance.resize.prep.start/.end *\* | Instance | Usage notification when a resize/migrate of an instance is begun | | compute.instance.resize.confirm.start/.end *\* | Instance | Usage notification when a resize/migration of an instance has been confirmed by the user | | compute.instance.resize.revert.start/.end *\* | Instance | Usage notification when a resize/migration of an instance has been reverted by the user | | compute.instance.exists *\* | Instance Audit | Periodic usage notification generated by the instance-usage-audit cron job. | | {color:#ff0000}compute.instance.reboot.start/.end *{color} | Instance | Usage notification when a reboot of the instance has been executed | | compute.volume.create.start/.end | Volume | Creation or a new volume notification | | compute.volume.delete.start/.end | Volume | Deletion of a volume notification | | compute.volume.attached.start/.end | Volume | Usage notification upon attaching of a volume to an instance | | compute.volume.detached.start/.end | Volume | Usage notification upon a volume has been detached from an instance | | compute.volume.exists | Volume Audit | Periodic usage notification generated by the volume-usage-audit cron job. | | compute.image.create.start/.end | Image | Creation of a new image | | compute.image.delete.start/.end | Image | Deletion of an image | | compute.image.exists | Image Audit | Periodic usage notification generated by the image-usage-audit cron job. | | compute.ip.allocate.start/.end | IP | Allocation of an IP address notification | | compute.ip.release.start/.end | IP | Deletion of an IP address notification | | compute.ip.associate.start/.end {color:#ff0000}(compute.instance.create_ip)\*{color} | IP | Association of an IP address to an instance | | compute.ip.disassociate.start/.end {color:#ff0000}(compute.instance.delete_ip)\*{color} | IP | Disassociation of an IP address to an instance | | compute.ip.exists | IP Audit | Periodic usage notification generated by the ip-usage-audit cron job. |

\*\* Events from the previous version: [1]

{color:#ff0000}\* Seen in the reviewed code {color}[nova/compute/manager.py|https://review.openstack.org/#patch,sidebyside,2460,10,nova/compute/manager.py]

Example of a reboot event: {code} {

 "_context_roles": ["admin"],
 "_context_request_id": "req-b41fca68-5fe4-4c9a-b3ba-956b72bae971",
 "event_type": "compute.instance.reboot.end",
 "timestamp": "2012-02-29 00:07:23.442571",
 "_context_auth_token": null,
 "_context_user_id": null,
 "payload": {
   "state_description": "rebooting_hard",
   "display_name": "instance03",
   "disk_gb": 0,
   "tenant_id": "54deadcc2c724dadbb3f59b139c97c09",
   "created_at": "2012-02-28 23:56:10",
   "instance_id": "8c12bedb-1817-4543-9223-2484b138dc66",
   "instance_type_id": 2,
   "memory_mb": 512,
   "instance_type": "m1.tiny",
   "state": "active",
   "user_id": "admin",
   "launched_at": "2012-02-28 23:56:17",
   "image_ref_url": "http:\/\/192.168.10.179:9292\/images\/9c5bbe68-04eb-4687-ae90-f96b876c9d50"
 },
 "_context_read_deleted": "no",
 "priority": "INFO",
 "_context_strategy": "noauth",
 "_context_is_admin": true,
 "_context_project_id": null,
 "_context_timestamp": "2012-02-29T00:07:23.442607",
 "publisher_id": "compute.devstack",
 "message_id": "88d14623-fa5a-4e2e-aff6-3289b7ae72dd",
 "_context_remote_address": null

} {code}

Create instance event: {code} {

 "_context_roles": ["admin"],
 "_context_request_id": "req-67c9cc6a-c6a0-4bd6-901d-4cab5fac2704",
 "event_type": "compute.instance.create.end",
 "timestamp": "2012-02-29 00:16:51.844539",
 "_context_auth_token": null,
 "_context_user_id": null,
 "payload": {
   "state_description": "",
   "display_name": "instance07",
   "disk_gb": 0,
   "tenant_id": "464e0e5fac1747e1b81f482d80525ea6",
   "created_at": "2012-02-29 00:16:43",
   "instance_id": "576b3a16-b8ee-4105-b84c-623fbbda1f04",
   "instance_type_id": 2,
   "memory_mb": 512,
   "instance_type": "m1.tiny",
   "state": "active",
   "user_id": "admin",
   "fixed_ips": [{
     "meta": {},
     "type": "fixed",
     "version": 4,
     "address": "10.0.0.3",
     "floating_ips": []
   }],
   "launched_at": "2012-02-29 00:16:51.564723",
   "image_ref_url": "http:\/\/192.168.10.179:9292\/images\/9c5bbe68-04eb-4687-ae90-f96b876c9d50"
 },
 "_context_read_deleted": "no",
 "priority": "INFO",
 "_context_strategy": "noauth",
 "_context_is_admin": true,
 "_context_project_id": null,
 "_context_timestamp": "2012-02-29T00:16:51.844580",
 "publisher_id": "compute.devstack",
 "message_id": "be0d96ba-73ce-4a37-b6a9-923eadd8f86a",
 "_context_remote_address": null

} {code}

Resources Model

Instance Audit

All instance attributes and:

IP

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NovaSpec