Integrate lunr block storage

Registered by Shannon Ward on 2011-02-07

The block storage service is being implemented as a separate project called lunr. This blueprint is for supporting and integrating that service into nova.

An API-fronted iSCSI-based block storage service that aims to offer moderate performance with a very low cost/GB of capacity. The service is composed in a 3-tier architecture.

1. Front-End API
2. Controller
2. Driver & Storage Subsystem

A basic description of each major component is described below:

Front-End API
 - Serves as the CRUD interface to consumers of storage
 - Request rate-limiting mechanisms are imposed here
 - List of API methods
   - Create Volume
   - List Volumes
   - List Performance of a Volume (IOPS)
   - List Usage of a Volume (I/O transactions aggregated over some time period)
   - Update Volume (metadata)
   - Delete Volume
   - Create Snapshot
   - List Snapshots
   - Update Snapshot (metadata)
   - Delete Snapshot

Controller
- Responsible for intelligent allocation and de-allocation of storage volumes across storage nodes
- Responsible for coordinating migration of volumes across storage nodes
- Responsible for coordination snapshot movement to/from Swift (Object Storage)
- Responsible for collecting IOPS metrics for performance and usage

Driver & Storage Subsystem
- Responsible for delivering a moderate level of performance and capacity
- Responsible as the target of an iSCSI session (a hypervisor would serve as the initiator)
- Responsible for generating IOPS metrics for performance and usage

Blueprint information

Status:
Complete
Approver:
Vish Ishaya
Priority:
High
Drafter:
Chuck Thier
Direction:
Needs approval
Assignee:
Chuck Thier
Definition:
Obsolete
Series goal:
None
Implementation:
Not started
Milestone target:
None
Completed by
Chuck Thier on 2011-07-26

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I have marked this blueprint as obsolete due to the change in scope of Lunr.

This blueprint is for the integration of the proposed BSaaS with nova

(?)

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* Blueprints in grey have been implemented.