Red Hat Gluster Storage provides persistent container storage for OpenShift. It has evolved from container-ready (running outside containers) to container-native (running inside containers). The current and upcoming versions provide dynamic storage provisioning without admin intervention, improved usability, and support for database workloads through non-shared storage. A demo shows deploying Gluster Storage containers in OpenShift and creating a new persistent volume claim for an application.

1. Persistent Storage for Containers with
Red Hat Gluster Storage
Red Hat Storage Day, NYC
Sayan Saha
Product, Red Hat Storage
Oct 2016

2. Linux for app/dev-centric IT
• The “cluster” is the computer
• The scope of the OS is now the “cluster” –
automate deployment, scaling and upgrade of
workloads
• Orchestrators (like Kubernetes, Marathon,
Swarm) is the heart of this new OS

3. Meet OpenShift!
• Red Hat’s next gen app platform -
kubernetes for enterprise + Add-Ons.
• Why?
• Consistent application run time across the hybrid
cloud
• Anti lock-in abstraction layer
• Runs everywhere including public clouds, VMW and
OSP!

4. APPLICATION
Abstraction Across Hybrid Cloud
DEVELOPER
CONTENT
ECOSYSTEM
PACKAGED
SERVICES
ECOSYSTEM
DEVELOPER
TOOLING
MANAGEMENT
TOOLS
Storage Network Identity ...
StandAlone/
BareMetal
RHEV
RHELOSP
VMWare
PUBLIC
CLOUD
-AWS
-AZURE
-GOOGLE
OpenShift provides a scale-out, “the
cluster is the computer platform” to
deploy fully-orchestrated multi-
container applications.
Built on RHEL Atomic Host in the
immutable infrastructure paradigm,
the docker project, OCI, etcd,
kubernetes, systemd.
Application is defined in abstraction
from Infrastructure provider details,
works across different cloud providers,
integrates with infrastructure services.
Fully Open Source, Standards-
based, pluggable.
OpenShift
RHEL / Atomic Host
Docker / OCI Kubernetes
Registry
Host Automation
Infrastructure Service Integration (Storage, Network,
Identity,...)
Log / Metrics Security

5. CONTAINERS NEED PERSISTENT STORAGE
“For which workloads or application use cases have you used/do you anticipate to use containers?”
Data Apps
Cloud Apps
Systems of
Engagement
Systems of
Record Web and Commerce
Software
Mobile Apps
Social Apps
77%
71%
62% 62%
57% 52%
46%
Scalable, Cost Effective, Distributed Storage for Containers
Base: 194 IT operations and development decision-makers at enterprise in APAC, EMEA,
and North America Source: A commissioned study conducted by Forrester Consulting on behalf of Red Hat, January 2015

6. The new face of storage in app-centric IT
• Greater abstraction between storage
and applications allows more flexibility
in deployment
• Developers want persistent storage
but do not want the overhead of
lengthy storage provisioning cycles
• Traditional storage appliances cannot
offer the speed and agility required
in app-centric IT

7. Where are we today?

8. DRIVING THE FUTURE OF STORAGE
Nov 2015 Mar 2016 July 2016
CONVERGENCE OF STORAGE AND COMPUTE
RHGS Container
● Dedicated storage cluster for
containerized and PaaS
environments
● Containerized Red Hat Gluster
Storage pooling and serving
storage from local hosts
CONTAINER READY STORAGE CONTAINERIZED STORAGE CONTAINER NATIVE STORAGE
● Containerized Red Hat Gluster
Storage inside OpenShift
Enterprise
● Enabled by the RHGS 3.1.3
release
● Enterprise class storage for
container platforms

9. CONTAINER NODE 1
CONTAINER NODE 2
NGINX Container
Wordpress Container
CONTAINER READY STORAGE
• Storage provided by a dedicated
Red Hat Gluster Storage cluster
and accessed over the network
• Enterprise grade storage provider
support for OpenShift
• Storage & compute can scale
independently

10. CONTAINER NODE 1
CONTAINER NODE 2
NGINX Container
NGINX Container
CONTAINERIZED
RED HAT GLUSTER
STORAGE
CONTAINERIZED RED HAT GLUSTER
STORAGE
• Red Hat Gluster Storage can be
deployed inside a container
• Storage Container can pool and
serve out storage from local hosts
• Available for download from Red
Hat’s container registry

11. OPENSHIFT NODE 2
CONTAINER NATIVE STORAGE
OPENSHIFT NODE 3
OPENSHIFT NODE 1
RHGS Container RHGS Container
OPENSHIFT NODE 4
MASTER
NGINX Container NGINX Container
Elasticsearch
RHGS Container
• Gluster runs inside OpenShift
in a container
• App & Gluster containers can
run side-by-side. Lower TCO.
• Unified orchestration &
upgrade for applications and
storage via kubernetes

12. Red Hat Gluster Storage Features
þ Data Services
þ Erasure Coding
þ Tiering
þ Bit-Rot Detection
þ Snapshots
þ Quotas
þ Mirroring/Sync Replication
þ Async Geo Replication
þ Protocols
þ Active/Active NFSv4
þ SMB3 (protocol negotiation, in-flight
encryption, server-side copy, VSS)
þ Management
þ Dashboard
þ Device Management
þ SNMP
þ Ansible based deployer
þ Rolling Upgrades
þ AD integration
þ Security & Data Integrity
þ SSL based in-flight encryption
þ At-rest encryption using dm-crypt
þ SELinux Enforcing Mode
þ Self Healing

13. Static V/S Dynamic Provisioning
With Static Provisioning in kubernetes (available now)
• Storage volumes are statically provisioned
• Admins provision a bunch of Persistent Volumes (PVs) in advance
• They carry the details of storage available in a cluster
With Dynamic Provisioning (available in a couple of months)
• Allocate (and deallocate) storage volumes (PVs) on demand
• Storage claims from developers are “bound” dynamically to volumes with
zero admin intervention

14. Persistent Storage for
OpenShift 3.4
Container Native +
Container Ready
Dynamic Provisioning
support
Usability improvements
GA: Dec 2016
Persistent Storage for
OpenShift 3.5+
Container Native +
Container Ready
Support for containerized
database workloads via
non-shared persistent
storage
GA: H1-2017
Support databases like MySql,
PostGres, MariaDB are often the
#1 workloads enterprises
containerize
Address customer pain point
of static/inflexible storage
provisioning.
ROADMAP

15. Resources
Webinars, data sheets, videos, blogs
redhat.com/containerstorage
Demo
https://asciinema.org/a/50531
Live Presentation (Red Hat Summit 2016)
https://youtu.be/gmEUnOmDziQ
Product Documentation
http://red.ht/2bjxOTX
Heketi Project
https://github.com/heketi/heketi

16. Q & A

17. Dynamic Provisioning of Storage
Developer
Developer
owned
Configures Classes
claim
Claim for “Gold”
Claim request specifies a class
References claim in pod
Pod
Administrator
Gold Silver Bronze
IOPS_SSD GP_SSD NFS
Administrator
owned

18. DemoDeploying Storage Containers in OpenShift

19. DemoCreating a new persistent storage volume

20. DemoVerifying storage claim in app running in OpenShift

21. Persistent Storage for
OpenShift 3.1
Container Ready
Native Kubernetes driver
Support for RHGS 3.1
Support for RHCS 1.3
Released: Nov 2015
Persistent Storage for
OpenShift 3.3
Container Native
Revalidate the solution
PV Selector Support
Released: Oct 2016
Persistent Storage for
OpenShift 3.2
Container Native
RHGS runs inside OpenShift
in containers/pods
API driven volume allocation
Statically Provisioned
Volumes
Released: July 2016
● Revalidate that it still works!
● PV selector helps developers select
the correct storage back-end from
similar kinds (NFS v/s Gluster)
Enterprise grade storage provider for app
containers.
● Unified compute + storage
orchestration for developers
● Lower TCO. No separate storage h/w