By Kendrick Coleman at EMC {code} Persistent applications are typically last on the list when it comes to container strategy, but the benefits that containers bring to general applications can go beyond what most recognize. Adding persistence extends the types of applications that can be containerized and opens the door to new opportunities for operating these applications. Getting there requires the right container platform that includes awareness of storage at all levels. Learn how they both play a critical role in making sure your new container strategy is inclusive of all applications.

1. highly available persistent
applications in containers
@kendrickcoleman
emccode.com | github.com/kacole2

3. Agenda
4 Persistence for containers, but why?
4 Volume Plugins with AWS in action
4 Performing fail-over of a container to another
container host

4. credit: LightBend (source: www.slideshare.net/Lightbend/the-6-traits-of-reactive-microservices)

5. hub.docker.com
7/12 are persistent

6. What's the problem?
4 When I run a persistent
application in a container,
where does my data get
stored?
4 one container holds the
directory and structure of
the application

7. What's the problem?
4 lose a container. lose the data.
4 or use -v for local persistence.
Will not tolerate server failure

8. Enter Docker Volume Plugin
Extensibility
4 simplified external storage
usage for containers
4 Receives plugin requests from
Docker Daemon for Volume
Create/Remove/Mount/
Unmount/Path
4 storage orchestration
4 /var/lib/plugin/volumes/
vol1/data

9. Solving the problem
4 docker run --volume-
driver=xyz -v remoteVol:/
mydata some-image

10. Solving the problem
4 lose the container, data
remains in tact on the remote
volume

11. Solving the problem
4 attach the volume to a new
container on a different host.
persisted state

12. REX-Ray
4 github.com/emccode/rexray
4 First libStorage Client/Server
(v0.4 6/21)
4 Storage Support (v0.3.3):
4 Virtualbox, AWS EC2 EBS,
GCE Disk, OpenStack Cinder
4 EMC ScaleIO, XtremIO, Isilon
& VMAX
4 HA Support via Preemption

14. Typical Install & Configuration (v0.3.3)
4 Install
curl -sSL https://dl.bintray.com/emccode/rexray/install | sh -
4 configuration file located at /etc/rexray/config.yml
rexray:
logLevel: warn
storageDrivers:
- virtualbox
mount:
volume:
preempt: true
virtualbox:
endpoint: http://10.0.2.2:18083
tls: false
volumePath: "/Users/<username>/VirtualBox Volumes"
controllerName: SATA

16. Featured Projects
emccode.com
4 github.com/emccode/rexray
4 github.com/emccode/polly
4 github.com/emccode/libstorage
4 github.com/emccode/mesos-module-dvdi
4 github.com/RackHD/RackHD

18. Thank YOu
We're Hiring!
## community.emccode.com
@kendrickcoleman