rightscale webinar: building blocks for private and hybrid clouds
TRANSCRIPT
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Building Blocks for Private and Hybrid Clouds
August 8, 2012
Watch the video of this webinar
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Your Panel Today
Presenting
• Brian Adler, Sr. Professional Services Architect, RightScale
• Ryan Geyer, Sales Engineer, RightScale
Q&A
• Noel Cohen, Account Manager, RightScale
Please use the “Questions” window to ask questions any time!
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Agenda
• Definitions and Terminology
• Infrastructure Evolution
• Private Cloud Key Considerations
• Hybrid Clouds – Different things to different people
• Use Cases for Private and Hybrid Clouds
• Best Practices for Private/Hybrid Cloud Design and Implementation• Design Considerations
• Hardware Consideration
• Software Considerations
• Implementation
• Management
• Conclusion/Q&A
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Definitions and Terminology
• Virtualization (server)• Division of one physical server into multiple isolated virtual environments
• Private Cloud• A collection of compute, storage, and network resources for a single tenant
that are accessed programmatically via an API endpoint.
• Public Cloud• A similar set of resources that is multi-tenant and is provided by a cloud vendor
with access via an API endpoint.
• Multi-Cloud• An environment that spans two or more separate clouds, be they both public,
both private, or one (or more) of each.
• Hybrid Cloud• An environment that spans one or more public clouds as well as one or more
private clouds.
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Infrastructure Evolution
• Old school Datacenters• Racks of physical nodes, one application per node
• It’s all we knew, it worked, and it was fine.
• Virtualization – The Early Years• Capability of a node outgrew the needs of any single application
• Lots of idle resources on each node
• Virtualization provided the ability to have a many-to-one (servers per node) relationship
• This was better
• Cloudification (Virtualization grows up)• Automated provisioning and management via an API appears
• This is much, much better
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Private Cloud Key Considerations
• Workload and Infrastructure Interaction• Applications have different resource needs
• Choose the right fit for your application and your infrastructure
• Security• Data may be contained within the private cloud, thus allowing for stricter
security compliance
• Latency• Consumers of the private cloud resources are generally “closer” to the private
cloud, which reduces latency
• User Experience• Related to latency, end user experience is enhanced due to proximity to
resources.
• Cost• OPEX is generally reduced. (CAPEX is another story )
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Hybrid Clouds
• What if application outgrows the private cloud?
• Common desire is for “cloud-bursting”• When private cloud resources are exhausted, a server tier expands into the
public cloud to tap into the “infinite” resources
• Considerations:• Security – public Internet is traversed
• Latency – traversal of public Internet involves the Great Unknown
• Cost – bandwidth charges for public Internet traversal
• Complexity – setting up a secure environment is not a trivial task
• More common use case is multiple clouds in an organization, with multiple applications, and with each application contained entirely within a single cloud.
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Hybrid Cloud Bursting
PRIVATE CLOUD PUBLIC OR PRIVATE CLOUD
LOAD BALANCERS
APP SERVERS
MASTER DATABASE
SLAVE DATABASE
OBJECT STORAGE
APP SERVERS
PUBLIC
INTERNET
Cloud Bursting
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Use Cases
• Self-Service IT Portal (“IT Vending Machine”)• Test/Dev environment
• Users select one of several preconfigured tech stacks
• “Siloed” environments
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Use Cases
• Self-Service IT Portal (“IT Vending Machine”)• Demo
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Use Cases
• Scalable Applications with Uncertain Demand• Public cloud used as “proving ground” for new applications
• If applications fail, they are allowed to run their course in the public cloud until they are end-of-lifed
• If an application gains traction, it remains in the public cloud during its growth phase
• When stability of workload is reached, the application is transitioned into the private cloud
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Use Cases
• Disaster Recovery (DR)• Production environment in one cloud
• DR environment in a second cloud
• Most common configuration is the “Warm DR” scenario• Replicating slave in a second cloud
• All other servers in non-operational state
• Failure of production environment requires promotion of slave to master, launching of “standby” servers, and DNS reassignment
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Design Considerations
• Location of Physical Hardware• On-premise
• Availability considerations (power, cooling, networking, etc.)
• Hosted or Colocation facility• Accessibility of hardware for additions and/or modification
• Latency to end users
• Security
• Availability and Redundancy Configuration• Easiest configuration (single zone, single region, single API endpoint) does not
promote high availability• Outage of API endpoint renders entire cloud unavailable
• Power issues affect entire pool of resources
• High Availability of cloud resources requires more complex configurations• Multiple zones, multiple regions (if possible/practical)
• Multiple API endpoints
• Redundant and segregated power and networking
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Design Considerations/Options
Simple ConfigurationNo HA or Redundancy
HA Configuration
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Design Considerations
• Intended Workloads and Use Cases• Does the application require high availability or is it tolerant of interruptions of
service?• User-facing will most likely require HA.
• Batch processing tasks may not.
• Is flexibility of the infrastructure required for test-beds and/or proof-of-concepts?
• Potential topologies and hardware options will be affected/limited
• Does the application require (or greatly benefit from) high performance CPUs?
• Does the application have high IOPS demands?
• Are low-latency interconnects required?
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Hardware Considerations
• Compute• Commodity
• Allows for easy addition of capacity
• Easy swap-out of failed components
• High end/specialized• May be required for intended workloads
• Limits available options
• Increases costs
• Complicates maintenance
• Networking• Driven by topology, latency demands, and price
• Some cloud infrastructure software offerings have support for network hardware devices (load balancers in particular)
• Storage• Cost vs. Performance (commodity? SSD?, etc.)
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Software Considerations
• Cloud Infrastructure Software• CloudStack, OpenStack, Eucalyptus, etc.
• Open source vs. commercial
• Dictates/influences other decisions regarding cloud implementation
• Access to resources• Web interface
• API
• Cloud Management Software• Abstracts underlying details of the cloud infrastructure offerings
• Presents consistent interface to the available resources regardless of the underlying infrastructure provider
• Provides a cloud-portable solution
• Provides orchestration tools for provisioning and management
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Implementation Process
• Hardware Procurement• Pre-existing or new?
• Pre-existing limits ability to tailor infrastructure to workloads
• Cloud Infrastructure Software• This decision will dictate/limit many future decisions
• Research options, and choose wisely!
• Cloud Topology• Zones, regions, storage allocation, HA considerations, etc.
• Build or Buy• Use in-house resources if expertise exists
• Third-party resources• Build using existing resources
• Build using new preconfigured hardware
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Management Process
• Compatibility• Avoid vendor lock-in at IaaS level, hypervisor level, cloud infrastructure software
level
• Unified Control/Security• “Single pane of glass” for user access, keys and credentials, etc.
• On-Demand, Self-Service Provisioning• Allow users to access resources without administrative intervention
• Focus on Applications• Core competency is in application development, so remove yourself from image
management, automation, provisioning, etc.
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Summary/Conclusions
• Private (and therefore hybrid) clouds were originally thought of as an academic exercise or science project
• Recent advances (particularly in cloud infrastructure software) have shown private and hybrid clouds to be viable IT delivery models
• Many considerations come into play• Design
• Hardware
• Software
• Implementation Details
• No “one size fits all”• Do your research. Find the right fit.
Contact RightScale(866) 720-0208