This document discusses persistent data in microservices architectures and introduces Flocker as a solution for portable persistence of databases and containers. It describes how Flocker allows containers to be deployed, migrated, and moved while maintaining access to data stored on EMC storage platforms. The document also introduces the Docker volume API and how EMC drivers integrate storage platforms like ScaleIO and Xtremio with Flocker. It notes that persistence approaches are evolving and microservices often require both stateless and stateful services.

1. Persistent Data in a Microservices World

2. OPEN
SOURCE
PERSISTENT
DATA
CLOUD-SCALE
SOFTWARE
MICROSERVICES
Microservices Architectures are Evolving

3. Multiple Approaches to Data Persistence

4. RYAN WALLNER CLINT KITSON KAMAL SRINIVASAN
Today’s Speakers

5. What is Flocker?
• Portable Persistence
• Databases + Containers
• Solves Stateless vs. Stateful
Container Issues
• Cluster Management
• Uses Docker under the hood
• Today: works with ZFS
(exp), EBS, OpenStack

6. Move/Deploy/Migrate Containers
Container
Start Container
Detach
--volume
Container
Start Container
Create/Attach
Volume
Unmount
Wait for IO
Deploy/Move/Migrate Container with your EMC Data Store!
All steps happen automatically
Local EMC
Storage
(Server SAN)
Shared External SAN
(XtremIO)
Flocker Volume API
EMC Driver
Flocker Volume API
EMC Driver
Attach
Local EMC
Storage
(Server SAN)
Shared External
SAN
(XtremIO)
Stop Container

7. Native Docker Integration
--volume-driver=flocker*
*https://github.com/ClusterHQ/flocker-docker-plugin
github.com/emccorp/scaleio-flocker-driver
github.com/emccorp/xtremio-flocker-driver

8. Micro-Services and Persistence
Load Balancing
Services
Routing
Non-Persistent
Persistent
Persistence is evolving!

9. Hello Volume Manager API!
• Volume Enhancements #13161
- EXPERIMENTAL (Docker 1.7)
- Refactor Volume Interface
- Prepare for Volumes as 1st class citizens
- Create a plugin client in Docker to request storage from a Volume
Manager API
• Enabling Storage and Virtualization Platforms to Provide
- Fast Bytes
- Data Services
- Data Mobility
- Availability

10. Example Mount

11. LibStorage?

12. DEMO: Docker Storage API with EMC Storage
Platforms

14. Docker Stateful Cloud Storage
Web AppsContent Repository Cloud ArchiveAnalytics
Global Namespace
Internet of Things
SITE 1 SITE 2 SITE 3

15. ECS Design Philosophy
Lego based
architecture

16. Docker Persistence
OS
Docker
Daemon
Hardware
Storage
Engine
Container
Any hardware
Any Linux distro

17. ECS Data Path

18. FREE ECS Software 2.0
• Free Unlimited capacity
• Free Unlimited time
• Go from application prototype to
production faster
• Container-ized download available on
DockerHub June 22nd
• Community driven support

19. Finding All the New Code
http://github.com/emccode/rexray
https://github.com/emccorp/scaleio-flocker-driver
https://github.com/emccorp/xtremio-flocker-driver
https://www.youtube.com/watch?v=ufSbF0-pk_Q
https://www.youtube.com/watch?v=QKwNWTEE6hA
https://github.com/EMCECS/ECS-CommunityEdition

20. Thank you
Ryan Wallner (@RyanWallner)
Clint Kitson (@ClintonSKitson)
Kamalavasan Srinivasan (@kamal_srini)