This document discusses VMware's vision for software defined storage and integration with OpenStack's Cinder block storage service. It introduces Virtual SAN and Virtual Volumes as ways to provide shared storage using local disks and make external storage VM-aware. The document outlines VMware's driver for Cinder that allows creation and attachment of VMDK volumes on vSphere. It notes current API support and roadmap items like storage policy support.

1. © 2011 VMware Inc. All rights reserved
Confidential
VMware and Cinder
Alex Jauch, Product Line Manager (@ajauch)
Kartik Bommepally, MTS (Cinder Driver Team)

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OpenStack on VMware

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VMware Vision: Software Defined Storage
Software Defined Storage
Software-Defined Storage Vision
Enable new storage tiers
Enable DAS & server flash for shared
storage along with enterprise SAN/NAS
Enable tight integration with storage
ecosystem
Tighter integrations with broad storage
ecosystem through APIs
Deliver policy-based automated
storage management
Automatically enforce per-VM SLAs for all
apps across different types of storage
“Gold”
Array(s)
“Silver”
Array(s)
Distributed
Storage
Hard
disks
SSD Hard
disks
SSD
Availability = 99.99%
DR RTO = 1
“Gold” SLA
Availability = 99%
Throughput = 1000 R/s, 20 W/s
Latency = 95% under 5 ms
DR RPO = 1’, RTO = 10’
Back up = hourly
Capacity res = 100%
Web Server
Database Server
Availability =
99.99%
DR RTO = 1 hour
Max Laten
“Bronze” SLA
Availability = 99%
Throughput = 100 R/s,10 W/s
Latency = 90% under 10 ms
DR RPO = 60’, RTO = 360’
Back up = weekly
Security = encryption
Reduce
Storage
Cost
and
Complexity
App Server

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Virtual SAN (VSAN)
What is Virtual SAN? Key Features
 Converged compute + storage solution
 Utilizes DAS and server attached disks
 Auto-tiering between SSD and HDD
 Intelligent policy driven data placement
across the cluster
 vCenter-integrated, instant storage
provisioning
 High performance storage at up to
50% lower cost
 Radically Simple Storage – configure
and manage without complex workflows
 Designed for dynamic scalability
and high resiliency
Clusters internal server disks to
provide scalable shared storage with
cloud agility and efficiency.
Customer Benefits
vSphere
Virtual SAN
Hard
disks
SSD
…………….
Hard
disks
SSD Hard
disks
SSD
Distributed Storage
Aggregated Datastore
vCenter Server

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vSphere
Virtual Volumes
What are Virtual Volumes? Key Features
 Existing SAN/NAS systems become
VM-aware
 Native representation of VMDKs
on SAN/NAS
 New API for data operations at
VMDK granularity
 Native representation of VMDKs
on storage
 Snapshots, replications and other
operations at VM granularity on
external storage
 Works with existing SAN/NAS
storage systems
 VM level storage SLA enforcement
Current Paradigm
VMDKs
on
LUNs
LUNs replicated
Virtual Volumes
vSphere
VMDKs on
storage
systems
VMDK replicated
Customer Benefits
Broad partner ecosystem

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What is Policy-based Management?
Storage Policy Based Management (SPBM)
• Simple policies to specify app SLA
requirements
• Automation of storage provisioning and
VM placement across clusters
• Works for any protocol : block, file
and object
• SLA Compliance monitoring & automatic
remediation
Key Features
• Drastically simplify storage provisioning
• Management of different storage tiers
as one
• Reduce storage cost by optimizing
consumption
Software Defined Storage
Enterprise SAN/ NAS
Virtual SAN BLOB Storage
Availability =
99.99%
DR RTO = 1 hour
Max Laten
SLA Definitions
Availability = 99.99%
DR RTO = 1 hour
Back up = daily
Storage capacity = 1 TB
Performance = High I/O
Security = High
Availability =
99.99%
DR RTO = 1 hour
Max Laten
SLA Definitions
Availability = 99%
DR RTO = 4 hour
Back up = weekly
Storage capacity = 10 TB
Performance = High I/O
Security = High
Customer Benefits

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The Basics: Storage Abstraction in vSphere
 The Datastore is the fundamental persistence abstraction.
 The VMDK is the Disk abstraction
 Storage Policy Based Management (SPBM) is the Control Plane
 VMware is Moving Away from LUN based policy and towards
VMDK based policy
• For Local Storage, this is done via VSAN
• For Shared Storage, this is done via VVOL
 VMware is Moving Away from Raw Device Map (RDM) Disks
 Thus, a VMDK Driver for Cinder

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Cinder VMDK Driver Work Flow
 As with Nova, vSphere Admin Sets Up Capacity Pools
• For Storage this Means Datastores in Havana
• For Icehouse, this will include SPBM
 Cloud Admin Creates Cinder Volume Types
• Volume Type is our MetaData Injection Vehicle
 Consumer Creates New Cinder Volume
• This Allows us to create meta data
 Consumer Attaches Cinder Volume
• We Lazy Create the VMDK Based on VM Target
• VMDK Is Mounted By vSphere Against Target

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Volume types and extra specs
 Driver allows additional configuration for volume creation via extra
specs in the volume type
 VMDK type
• Use extra spec key ‘vmware:vmdk_type’
• Legal Values: ‘thin’, ‘thick’ and ‘eagerZeroedThick’
• Default type is ‘thin’
 Clone type
• Use extra spec key ‘vmware:clone_type’
• Legal Values: ‘full’ and ‘linked’
• Default type is ‘full’

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What the Heck is a “Shadow” VM?
 In vSphere There is No “First Class Disk” Object. Yet.
 When You Create a VMDK It Must be the Child of a VM
 However, Cinder Assumes a First Class Disk
 Therefore, A “Shadow” VM is inserted
 <<<KARTIK, INSERT SCREEN SHOT HERE OF SHADOW VM>>>

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DEMO
VMware VMDK Driver for Cinder

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Current API Support
 Create volume
• Supported VMDK types – thin, thick, eagerZeroedThick
• From scratch
• From glance image
• From an available source volume – full clone and linked clone
• From a snapshot – full clone and linked clone
 Attach volume to an instance
 Detach volume from an instance
 Snapshot an available volume
 Delete snapshot of an available volume
 Upload an available volume as glance image
 Delete volume

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Committed Roadmap
 Support for Storage Policy Based Management (SPBM)
 Fix for SnapShot/Clone Issues with Attached Volumes
 Move Core Storage Code into Oslo
 Implement Remaining API Items
 Incorporate Additional Icehouse APIs
 Nova Support for SPBM

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Thoughts Beyond Icehouse
 Common Meta Data Model Between Cinder and Nova
 Support For Application Consistent Snapshots
 DR/HA Considerations in Cinder
• How Do we Abstract Availability Zones?
 Storage QOS
• How Do We Represent Performance Contracts?
 Inter DC Data Mobility Services
 Alerting/Policy Violation Support, Ceilometer?
 Others?

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Demo
VMware vSphere on
OpenStack
by Scott Lowe
Location: Sponsor
Demo Theatre
Date: Wed @ 2 PM
General Session
Navigating the
Transition to
Network
Virtualization
With Martin Casado
Location: Asia World –
Summit Hall 2
Date: Tues @ 12:05 PM
http://vmware.com/go/openstack
Day Time Room Title Speaker
Tuesday 2:50
PM
Sky City Marriott -
Grand Ballroom C
User Panel: How did you bring OpenStack
Cloud to your company
Panel
Tuesday 3:40
PM
Expo Breakout Room 1 Bridging the Gap: Explaining OpenStack to
VMware Administrators
Scott Lowe
Wednesday 11:15
AM
Expo Breakout Room 1 OpenStack + VMware: Customer Success
Stories & What’s Next
Dan Wendlandt
Wednesday 5:30
PM
Expo Breakout Room 1 Network Virtualization with OpenStack
Neutron & VMware NSX
Somik Behera
Dimitri Desmidt
Thursday 9:50
AM
Sky City Marriott -
Meeting Room 4
Differentiated Services == Differentiated
Scheduling
Gary Kotton
Thursday 2:40
PM
Sky City Marriott -
Grand Ballroom C
Open vSwitch Deep Dive: The Virtual
Switch for OpenStack
Eric Lopez
Justin Pettit
Thursday 3:30
PM
Sky City Marriott -
Meeting Room 4
Bridging the Gap: Cinder and vSphere Alex Jauch
Kartik Bommepally
Thursday 5:20
PM
Sky City Marriott -
Grand Ballroom C
How to Write a Neutron Plugin, If You
Really Need To
Salvatore
Armando
Friday 11:00
AM
Sky City Marriott -
Grand Ballroom A&B
Hands-on with OpenStack + vSphere Gary Kotton
Friday 1:30
PM
Sky City Marriott -
Grand Ballroom A&B
OpenStack Networking Hands-on Lab Eric Lopez
Aaron Rosen
Learn More!

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Thank You!