Difference between revisions of "CephBlockDriver"

Latest revision as of 23:31, 17 February 2013

Launchpad Entry: NovaSpec:https://blueprints.launchpad.net/nova/+spec/ceph-block-driver
Created: 2010-11-17
Contributors: Michael Rodriguez, Mike Perez

Summary

Add Ceph block device support to nova.

Release Note

Ceph is a distributed file system which provides a Block Device interface via Qemu.

Rationale

OpenStack needs a Scalable, Reliable Storage Service that can be accessed as a block device over the network to allow quick failover and live migration.

User stories

User would like to have file system images that persist beyond node failure and would like to be able to live migrate a VM without copying any data.

Assumptions

The user has sufficient network capacity to handle the network traffic involved with accessing a block device over the network.

Design

Implementation

Chef or Puppet recipe for setting up Ceph nodes and RBD. Easy configuration of Openstack to use the newly setup Storage service. (via LibVirt)

driver = name => "qemu", type => "rbd"

path = "rbd:$pool/$vol"

http://ceph.newdream.net/wiki/Kvm-rbd

Test/Demo Plan

@@ Line 1: / Line 1: @@
-__NOTOC__
-* '''Launchpad Entry''': [[NovaSpec]]:https://blueprints.launchpad.net/nova/+spec/ceph-block-driver
+* '''Launchpad Entry''': NovaSpec:https://blueprints.launchpad.net/nova/+spec/ceph-block-driver
 * '''Created''': 2010-11-17
 * '''Contributors''': Michael Rodriguez, Mike Perez
@@ Line 22: / Line 22: @@
 == Assumptions ==
-The user have sufficient network capacity to handle the network traffic involved with accessing a block device over the network.
+The user has sufficient network capacity to handle the network traffic involved with accessing a block device over the network.
 == Design ==
@@ Line 28: / Line 28: @@
 == Implementation ==
-This section should describe a plan of action (the "how") to implement the changes discussed. Could include subsections like:
+Chef or Puppet recipe for setting up Ceph nodes and RBD.
+Easy configuration of Openstack to use the newly setup Storage service. (via [[LibVirt]])
-=== UI Changes ===
+driver = name => "qemu", type => "rbd"
-Should cover changes required to the UI, or specific UI that is required to implement this
+path = "rbd:$pool/$vol"
-=== Code Changes ===
+http://ceph.newdream.net/wiki/Kvm-rbd
-Code changes should include an overview of what needs to change, and in some cases even the specific details.
-=== Migration ===
-Include:
-* data migration, if any
-* redirects from old URLs to new ones, if any
-* how users will be pointed to the new way of doing things, if necessary.
 == Test/Demo Plan ==
-This need not be added or completed until the specification is nearing beta.
-== Unresolved issues ==
-This should highlight any issues that should be addressed in further specifications, and not problems with the specification itself; since any specification with problems cannot be approved.
-== BoF agenda and discussion ==
-Use this section to take notes during the BoF; if you keep it in the approved spec, use it for summarising what was discussed and note any options that were rejected.
 ----
 [[Category:Spec]]