Demystifying OpenStack Storage

1© Copyright 2015 EMC Corporation. All rights reserved.
DemystifyingOpenStack
Storage
OpenStack India Day 2015
August 8th 2015

Parashuram Hallur (Parash)
Principal Engineer, EMC Corporation
Today’s Speaker

Agenda
• Block Storage – Cinder
• Object Storage – Swift
• Image Storage – Glance
• File Storage – Manila
• Current Capabilities – As of Kilo
• Road Ahead – Liberty Plans

Cinder– Block Storage
“Storage as A Service that provides the persistent block storage
resources that Compute instance can consume.”
• Appropriate for any scenario where persistent block storage is
required ( e.g root disk for VM, secondary volume for
database etc.)
• Software Defined Block Storage Controller
– to manage multi vendor storage systems .
– Using a single central console.
• Storage tiers are managed by volume types.
• Provides ability to choose
– Plugin architecture
– Use storage that fits your needs
– Mix of proprietary and open-source choices
FC
iSCSI
ScaleIO
GlusterFS
Protocols

Cinder– Architecture
Source: OpenStack Vancouver Summit Cinder 102 Session

Cinder– Current Capabilities
• Create/Delete Volume
• Attach/Detach volume to/from an Instance
• Volume Copy ( Clone ), Point in time copy ( Snapshot )
• Create Volume From Image, Create Image From Volume
• Volume from Snapshot
• Backup Volume ( to object store, swift and ceph ) and restore.
– From Kilo, incremental backup
– Encrypted volumes
• Transfer volume ownership
• Per tenant usage quotas
• Consistency Groups ( From Juno )
• Volume Replications
• Administrative Operations
• QoS
• Cinder Manage ( Brownfield )
• Resource Pool Management
• Private Volumes
• Rolling Upgrades
• Volume Migration
• iSCSI Multipathing
• 1 volume to 2 hosts
• Instance Live Migration
50+
storage
systems

Cinder– Liberty Plan
• V2 Replication
• Incremental Backups
• NFS and POSIX backups
• Encrypted volume backups
• Export and Import of snapshots
• Rolling Upgrades
• Private Volume Types
• Enhancements to backend status – Storage Policies and
Capabilities

Swift– Object Storage
“It is an object storage system designed for data that needs to be
instantly accessible, stored forever, and accessible from multiple
devices”
• Object Store, analogous to S3
• Storage for unstructured data, does not really care about the type
• Currently powers the largest object storage clouds.
– Rackspace Cloud Files,
– HP Cloud,
– IBM Softlayer Cloud and countless private object storage clusters.
• Runs on standard Linux or x86
• Scaled by adding additional nodes, cost effective linear storage
expansion.

Swift– Architecture
Source : www.openstack.org

Swift– Capabilities
• Distributed
• Highly Available
• Eventually Consistent
• Global Scale
• Simple, Powerful API
• Pooled Storage Capacity
• Ownership of your data
• S3 API support
• Works on commodity Hardware

Swift– Liberty Plans
• Large Containers
• Increasing Ring Partition Power
• Swift on disk encryption
• Tiering
• Swift Storlets
• Tape Storage

Glance – Image Storage
“VM Image Management Service”
• Provides centralized source of VM images for Nova nodes
• Stores Images and Metadata Definitions
• Discovering, registering, and retrieving virtual machine images.
• VM images made available through Glance can be stored in a
variety of locations from simple file systems to object-storage
systems like the OpenStack Swift project.

Glance – Architecture
Source : www.openstack.org

Glance – Capabilities
• Create/Delete Image
• List Image
• Show Image
• Image Download

Glance – Liberty Plan
• Object Downloads
• Hierarchical Multi-tenancy
• Upload Recovery
• Image Signing and Encryption
• Inter-cloud Image sharing
• OVF support
• NoSql backend support

Manila – FileStorage
“Storage as A Service that provides the File storage resources that
Compute instance can consume.”
• Multitenant, secure, file share as service
• Software Defined File Storage Controller
– to manage multi vendor storage systems .
– Using a single central console.
• Storage tiers are managed by File Share types.
• First to bring shared file services to the cloud
• Share Access Rules
• Accessed through “share network”
NFS
CIFS
Protocols

Manila – Architecture
Source : OpenStack Vancouver Summit Manila 101 Session

Manila – Current Capabilities
• Create/Delete File Share
• Attach/Detach Fileshare to/from an Instance
• Point in time copy ( Snapshot )
• Create Share From Snapshot
• Network Plug-in Model
• Advanced Resource Pool Management
• Distro ( RDO, Ubuntu, SUSE )
• Puppet Module for Manila
• Heat Plugin support
• Devstack plugin
• Share Manage/UnManage
10+
storage
systems

Manila – Liberty Plans
• Mount Automation
• Share Migration
• Share Replication
• Fault Indication
• Thin Provisioning
• Consistency Groups
• Snapshot-Share Relationship
• Manila Service Image
• Versioned Objects
More drivers
are expected
in Liberty

References
• OpenStack Summit Vancouver 2015
• https://blueprints.launchpad.net/cinder/
• https://blueprints.launchpad.net/manila/
• https://blueprints.launchpad.net/swift/
• https://blueprints.launchpad.net/glance/
• http://docs.openstack.org/

Demystifying OpenStack Storage

Demystifying OpenStack Storage

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