This talk explores the best approaches to integrating storage with application containers such as Docker. The statelessness of application containers presents challenges when it comes to the use and management of storage resources in a dynamic and multi-server environment. This talk particularly explores the ways in which Virtuozzo Storage offer a compelling solution to these challenges.

1. Virtuozzo Persistent
Storage for Docker
Andre Moruga
Director of Program Management,
Virtuozzo
@VirtuozzoInc

2. Docker and
persistent storage
• Why go persistent
from test to
production?
• Available options
Agenda
State-of-the-art and
future development
• Developing for Docker
• Storage in Kubernetes
Virtuozzo Storage
for Docker
• Solution overview
and benefits
• Performance

3. Persistent Storage in Docker:
Why and How?

4. Persistent Storage in Docker
• “Cattle” vs “Pets”
• Persistent data for “Cattle”
containers
• Storing persistent data in
Docker
Copyright © 2016 Virtuozzo. All Rights Reserved. 4

5. 5Copyright ©2016 Virtuozzo. All Right Reserved.
What You Need to Know About Docker Volume
Docker Volume:a directory with persistent
data in an ephemeralcontainer
• Long lived
• Attachesto a container on start
• Can be initialized with initial content
And why you should care
/
/etc
Container
Volume
/bin
/usr
/var
/data

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Docker Volumes in Production
Native Docker volumes:
• Coupled with physical servers
• Hard to manage
• Mostly for testing and
development
• Better options are available via
plugin extensions
Basics won’t do the job

7. Docker Volume Plugins 101
Docker Volume plugin:
externally stored and managed Docker volumes
• Available since Docker 1.8
• Simple to leverage
• Simple to implement
• Many plugins are available
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Developing Docker Volume Plugin
Things change rapidly
• Changes ofAPIs/semantics during Q1 of 2016
• From 9 plugins in January to 18 in June of 2016
Room for improvement
• “Globally available” volumes are not (yet) recognized by Swarm
• Very little storage management exposed via Docker, Swarm or UCP
(no resize, snapshot, clone, QoS)
• No way to define volume availability boundaries in Compose
Our experience

9. Persistent Storage in Kubernetes
Kubernetes storage driver implementation
• Unique plugin system
• Shares pod’s lifetime
• About a dozen of plugins available
• Standard storages supported
• Native Virtuozzo storage/Kubernetes plugin is in
development
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10. 10Copyright ©2016 Virtuozzo. All Right Reserved.
Virtuozzo Storage for Docker
• Originally built for system
containers
• Software-defined storage
• Combines compute and storage
• Focus on multi-tenant
performance
• Scalable to hundreds
of nodes and PBs of data
The prefect match

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Features and Benefits
Features
• Redundant and highly available
• SSD cache
• Hot/Cold data tiered
• Flexible redundancy
• Auto-balancing
Benefits
• Works on commodity hardware
• Converged platform: increase both storage and compute
capacity simultaneously
• Block, File, Object (S3) storage
• Put idle drives at work
• Fast replication/self-healing times
of Virtuozzo Storage

12. Virtuozzo Storage Performance
Optimized for a multi-tenant,
multi-user environment
• Great performance for random IO
• Up to 15x faster than alternatives
• Scales linearly as clusters grows
• Automatically (re)-balances data
Copyright © 2016 Virtuozzo. All Rights Reserved. 12

13. • Visit Virtuozzo at booth S28
• Download Virtuozzo Storage for Docker at
https://virtuozzo.com/docker-storage/
• Check out our performance comparison
https://goo.gl/IozPSW
• Developer? Our Docker Volume plugin is at
https://github.com/virtuozzo/docker-volume-ploop
Sound interesting?

14. Thank you.
Virtuozzo Booth S28