Ceph is a unified distributed storage system that integrates well with OpenStack, offering features like self-management, painless scaling, and efficient data placement. The document discusses its development, especially under the Havana release, highlighting enhancements such as the Cinder driver refactor and backup capabilities. Future roadmaps include improvements for snapshot integration, volume migration, and additional support for OpenStack components.

1. Ceph: de factor storage backend for
OpenStack
OpenStack in Action 4! Paris, 5th December

2. Whoami
💥 Sébas9en Han
💥 French Cloud Engineer working for eNovance
💥 Daily job focused on Ceph and OpenStack
💥 Blogger
Personal blog: hGp://www.sebas9en-­‐han.fr/blog/
Company blog: hGp://techs.enovance.com/
Worldwide offices coverage
We design, build and run clouds – any9me -­‐ anywhere

3. Ceph
What is it?

4. The project
➜ Unified distributed storage system
➜ Started in 2006 as a PhD by Sage Weil
➜ Open source under LGPL license
➜ Written in C++
➜ Build the future of storage on commodity hardware

5. Key features
➜ Self managing/healing
➜ Self balancing
➜ Painless scaling
➜ Data placement with CRUSH

6. Controlled replica9on under scalable hashing
➜ Pseudo-random placement algorithm
➜ Statistically uniform distribution
➜ Rule-based configuration

7. Overview

8. State of the integra9on
Including best Havana’s addi9ons

9. Why is Ceph so good?
It unifies OpenStack components

10. Havana’s addi9ons
➜ Complete refactor of the Cinder driver:
• Librados and librbd usage
• Flatten volumes created from snapshots
• Clone depth
➜ Cinder backup with a Ceph backend:
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•
•
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backing up within the same Ceph pool (not recommended)
backing up between different Ceph pools
backing up between different Ceph clusters
Support RBD stripes
Differentials
➜ Nova Libvirt_image_type = rbd
• Directly boot all the VMs in Ceph
• Volume QoS

11. Today’s Havana integra9on

12. Is Havana the perfect stack?
…

13. Well, almost…

14. What’s missing?
➜ Direct URL download for Nova
• Already on the pipe, probably for 2013.2.1
➜ Nova’s snapshots integration
• Ceph snapshot
https://github.com/jdurgin/nova/commits/havana-ephemeral-rbd

15. Icehouse and beyond
Future

16. Tomorrow’s integra9on

17. Icehouse roadmap
➜ Implement “bricks” for RBD
➜ Re-implement snapshotting function to use RBD snapshot
➜ RBD on Nova bare metal
➜ Volume migration support
➜ RBD stripes support
« J » poten9al roadmap
➜ Manila support

18. Ceph, what’s coming up?
Roadmap

19. Firefly
➜ Tiering - cache pool overlay
➜ Erasure code
➜ Ceph OSD ZFS
➜ Full support of OpenStack Icehouse

20. Many thanks!
Questions?
Contact: sebastien@enovance.com
Twitter: @sebastien_han
IRC: leseb