architectural solutions for the cloud

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Ambients and Service Oriented Architecture: Architectural Solutions for the Cloud

Dr. Nour Ali [email protected]

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Agenda

Cloud Computing Challenges Approaches and Solutions Ambients in Software Architecture Ambient Service Oriented Architecture for

Cloud Computing Further Work

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Cloud Architectural Parties

Resources

Servers Network Memory CPU cycles Storage Space

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Many Devices can be connected to the Cloud

SOA and the CLoud

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Challenges

Application Integration IssuesApplications are geographically dispersed.

Interoperability

Dr. Alexander Pasik, CIO at IEEE:"Security is certainly a very important

consideration, but it's not what will inhibit further adoption,”

"To achieve the economies of scale that will make cloud computing successful, common platforms are needed to ensure users can easily navigate between services and applications regardless of where they're coming from, and enable organizations to more cost-effectively transition their IT systems to a services-oriented model."

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Higher Abstraction

Cloud Computing increases agility and costs Free developers from dealing with low-level

issues such as hardware configurations or network management (Khalid, 2011)

Service Oriented Architecture

SOA is an architectural style, realized as a collection of collaborating agents, each called a service, whose goal is to manage complexity and achieve architectural resilience and robustness through ideas such as loose coupling, location transparency, and protocol independence.

The basic principles of SOA are:Boundaries are explicitServices are autonomousShare schemas and contracts, not implementationsService compatibility is based on policy

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An ambient is a place, delimited by a boundary, where computation happens.

Examples of ambients are: Devices such as laptops, PDAs, etcA webpageData packetsFirewallsNetworksA Building or an airplane

Ambient CalculusCardelli and Gordon, 1998

m

n

in m P

Q

R

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An ambient is a place, delimited by a boundary, where computation happens.

Examples of ambients are: Devices such as laptops, PDAs, etcA webpageData packetsFirewallsNetworksA Building or an airplane

Ambient CalculusCardelli and Gordon, 1998

m

Open m R

Model Driven Engineering

Model Driven Engineering permits the automation of the software development process using models

Platform Independent Model (PIM)

Platform Specific Model (PSM)

Code

Technological Patterns

Implementation Patterns

Transformation Patterns

Specifies how the functionality specified in a PIM is realized on a particular platform

A “formal” specification of the structure and function of a system that abstracts away technical detail

Specifies how the functionality specified in a PSM generates code to be executed

Service Oriented Architecture Modeling Language

OMG standard

Approach

An approach that allows service oriented architects to design models using ambients and be able to generate executable applications.

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A modeling tool which allows developers to design/specify the architectures in an abstract way: Provide different types of ambients suitable for cloud

computing e.g., mobile cloud, Infrastructure as a Service (IaaS), Cell as a Service, etc

Using Model Driven Engineering techniques to automatically: Validate the suitability of the existing cells,

platforms, etc.Generate the needed code for configurationDeploy the applications (services) on the cloud

Manage the applications at runtime:Detection of Failure of NodesMonitoring the properties

Proposal Objective

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What is an Ambient in Software Architecture?

An ambient is a kind of connector that… Represents the boundary where Components and other

connectors are located.

Ambient

subAmbientIC

ESIS

EC

IR

« connector

Connector

« connector

Connector

« connector

Connector

« connector

Connector

ComponentComponent

Coordinates what is in from what is out of a boundary for mobility or communication purposes.

Can locate other ambients.

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Ambient(from Ambients)

Group

newGroup(GrpName : string)

Site

newSite(SiteName : string)

Virtual

newVirtual(VirtName : string)

inv distSite:self.Aspect-->select(A| A.concern="distribution")-->one(At| At.name="physicalLocation" and A.DataType.kind="loc")

inv inmobileRoot:self.Aspect-->select(A|A.concern="distribution")--> exists(A.Attribute-->one(a| a.name="location" and a.oclIsTypeOf(ConstantAttribute)) impliesself.Name=`Root`

inv childVirtual:self.child-->forall(c|c.oclIsTypeOf(Virtual) or c.oclOsTypeOfSite))

inv childSite:self.child-->not exist(c| c.oclIsTypeOf(Virtual))

inv childGroup:self.child-->not exist(c|c.oclIsTypeOf(Virtual) or c.oclIsTypeOf(Site))

Kinds of Ambients

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Moving a Bidder Agent

AuctionSite

IC

ES IS

EC

Auction1« connector »<<connector>>

AuctionCnctr1

MobilityAspect

DistributionAspect

Weaving

CoordinationAspect

MobilityAspect

DistributionAspect

Weaving

CoordinationAspect

ClientSite

Customer «connector»

AgentCustCnct

ECECICIC

ISISESES

MobilityAspect

DistributionAspect

Weaving

CoordinationAspect

MobilityAspect

DistributionAspect

Weaving

CoordinationAspect

MobilityAspect

DistributionAspect

Weaving

CoordinationAspect

MobilityAspect

DistributionAspect

Weaving

CoordinationAspect ICIC

ISIS

Root

Bidder1

out exit(Name,Parent)

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Moving a Bidder Agent

AuctionSite

IC

ES IS

EC


AuctionCnctr1

MobilityAspect

DistributionAspect

Weaving

CoordinationAspect

MobilityAspect

DistributionAspect

Weaving

CoordinationAspect

ClientSite


AgentCustCnct

ECECICIC

ISISESES

MobilityAspect

DistributionAspect

Weaving

CoordinationAspect

MobilityAspect

DistributionAspect

Weaving

CoordinationAspect

MobilityAspect

DistributionAspect

Weaving

CoordinationAspect

MobilityAspect

DistributionAspect

Weaving


ISIS

Root

Bidder1

out accept(Bidder1,……)

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Reconfiguration of attachments in ClientSite

AuctionSite

IC

ES IS

EC


AuctionCnctr1

MobilityAspect

DistributionAspect

Weaving

CoordinationAspect

MobilityAspect

DistributionAspect

Weaving

CoordinationAspect

ClientSite


AgentCustCnct

ECECICIC

ISISESES

MobilityAspect

DistributionAspect

Weaving

CoordinationAspect

MobilityAspect

DistributionAspect

Weaving

CoordinationAspect

MobilityAspect

DistributionAspect

Weaving

CoordinationAspect

MobilityAspect

DistributionAspect

Weaving


ISIS

Root

Bidder1

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Bidder Exited

AuctionSite

IC

ES IS

EC


AuctionCnctr1

MobilityAspect

DistributionAspect

Weaving

CoordinationAspect

MobilityAspect

DistributionAspect

Weaving

CoordinationAspect IC

IS

Root

Bidder1

ClientSite


AgentCustCnct

ECECI CI C

I SI SESES

MobilityAspect

DistributionAsp ect

Weaving

CoordinationAspect

MobilityAspect

DistributionAsp ect

Weaving

CoordinationAspect

ESIS

AuctionSite

IC

ES IS

EC


AuctionCnctr1

MobilityAspect

DistributionAspect

Weaving

CoordinationAspect

MobilityAspect

DistributionAspect

Weaving

CoordinationAspect

MobilityAspect

DistributionAspect

Weaving

CoordinationAspect

MobilityAspect

DistributionAspect

Weaving


ISIS

Root

Bidder1Bidder1

ClientSite


AgentCustCnct

ECECI CI C

I SI SESES

MobilityAspect

DistributionAsp ect

Weaving

CoordinationAspect

MobilityAspect

DistributionAsp ect

Weaving

CoordinationAspect

ClientSite


AgentCustCnct

ECECI CI C

I SI SESES

MobilityAspect

DistributionAsp ect

Weaving

CoordinationAspect

MobilityAspect

DistributionAsp ect

Weaving

CoordinationAspect

ESIS

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Bidder Entering AuctionSite

AuctionSite

IC

ES IS

EC


AuctionCnctr1

MobilityAspect

DistributionAspect

Weaving

CoordinationAspect

MobilityAspect

DistributionAspect

Weaving

CoordinationAspect IC

IS

Root

Bidder1

ClientSite


AgentCustCnct

ECECI CI C

I SI SESES

MobilityAspect

DistributionAsp ect

Weaving

CoordinationAspect

MobilityAspect

DistributionAsp ect

Weaving

CoordinationAspect

ESIS

AuctionSite

IC

ES IS

EC


AuctionCnctr1

MobilityAspect

DistributionAspect

Weaving

CoordinationAspect

MobilityAspect

DistributionAspect

Weaving

CoordinationAspect

MobilityAspect

DistributionAspect

Weaving

CoordinationAspect

MobilityAspect

DistributionAspect

Weaving


ISIS

Root

Bidder1Bidder1

ClientSite


AgentCustCnct

ECECI CI C

I SI SESES

MobilityAspect

DistributionAsp ect

Weaving

CoordinationAspect

MobilityAspect

DistributionAsp ect

Weaving

CoordinationAspect

ClientSite


AgentCustCnct

ECECI CI C

I SI SESES

MobilityAspect

DistributionAsp ect

Weaving

CoordinationAspect

MobilityAspect

DistributionAsp ect

Weaving

CoordinationAspect

ESIS

out enter(Name, NewAmbient)

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Bidder in AuctionSite

AuctionSite

IC

ES IS

EC


AuctionCnctr1

MobilityAspect

DistributionAspect

Weaving

CoordinationAspect

MobilityAspect

DistributionAspect

Weaving

CoordinationAspect

MobilityAspect

DistributionAspect

Weaving

CoordinationAspect

MobilityAspect

DistributionAspect

Weaving


ISIS

Root

Bidder1Bidder1

ClientSite


AgentCustCnct

ECECI CI C

I SI SESES

MobilityAspect

DistributionAsp ect

Weaving

CoordinationAspect

MobilityAspect

DistributionAsp ect

Weaving

CoordinationAspect

ClientSite


AgentCustCnct

ECECI CI C

I SI SESES

MobilityAspect

DistributionAsp ect

Weaving

CoordinationAspect

MobilityAspect

DistributionAsp ect

Weaving

CoordinationAspect

ESIS

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Configuration Level

Architectural_Model_Configuration MobileAgentsAuctionConf = New MobileAgentsAuction { IP1 = new loc(ip.of.host.1); IP2 = new loc(ip.of.host.2); IP3 = new loc(ip.of.host.3); ROOT = new Root() ; ClientSite = new HostSite(ROOT, IP1); AuctionSite = new HostSite(ROOT, IP2); …… Bidder1 = new Bidder(“ClientSite”); ……

AttchBidder1Auc1=new AttchBidderAuc(Bidder1, BidderAUCTPort, AuctionHouseCnct1, BidderPortAuct);

Physical Locations

Ambient Hierarchy

Instantiation of elements

Attachments

V Jornadas de DYNAMICA - Valencia, 23 y 24 de noviembre 2006

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Execution of Ambient-PRISMANET

DEMO

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Ambient-SoaML metamodel

Tool Usage

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1

2

3

4

5

Validation

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Text View

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ECore View

Text View

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Agenda

Cloud Computing Challenges Ambients in Software Architecture Ambient Service Oriented Architecture for

Cloud Computing Further Work

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Architecture of a Hybrid Dev Environment

Private Cloud (Isolated Network)Only accessible from Corporate

Corporate Network

Isolated Network in Amazon

Amazon Cloud (US-East Datacenter)

IPSec VPNapprox 230ms

RTT

Remote-desktop to XX.XX.0.*(No direct access to Amazon VPC)

Internet

On-Premise Servers

Enterprise Data storeAuthentication server

Virtual Machines

Business Web application

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Ambients for Cloud Independent of technology

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Architecture of a Hybrid Dev Environment

On-Premise Servers


Virtual Machines


Corporate Network

Desktop

Private Cloud

Server

Amazon

US-East Data Center (Cloud)

Server

Virtual Machine

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Application Deployment in a Hybrid Dev Environment

On-Premise Servers


Virtual Machines


Corporate Network

Desktop

Private Cloud

Server

Amazon


Server

Virtual Machine

Package

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On-Premise Servers


Virtual Machines


Corporate Network

Desktop

Private Cloud

Server

Amazon


Server

Virtual Machine

Package

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On-Premise Servers


Virtual Machines


Corporate Network

Desktop

Private Cloud

Server

Amazon


Server

Virtual Machine

Package

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On-Premise Servers


Virtual Machines


Corporate Network

Desktop

Private Cloud

Server

Amazon


Server

Virtual Machine

Package

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On-Premise Servers


Virtual Machines


Corporate Network

Desktop

Private Cloud

Server

Amazon


Server

Virtual Machine

Mobility and Reconfiguration

When resources not enough on mobile device move application to cloud


Mobile Device

CLOUD

Server

Virtual Machine




Mobile Device

CLOUD

Server

Virtual MachinePackage




Mobile Device

CLOUD

Server

Virtual Machine

Package




Mobile Device

CLOUD

Server

Virtual Machine

Scenarios of Reconfiguration

Application A

Application B

Application C

Private Cloud

Spikes in demand for App.C but your private cloud has no resources! Application C

Application A

Application BIf App. C has huge amount of data or has sensitive data to transfer

reconfiguration Application A

Application B

Application C

Application C

Public Cloud

Rent computing resources in public cloud(s) and replicated App. C to meet the (short-time) demand

• Dynamic reconfiguration of applications to use a public cloud when a private cloud cannot provide enough computing resources

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Mapping Ambient into cloud technology

Windows Azure AppFabricConnect existing applications to the cloudConnect through network boundaryEasily control authorization to apps.

A Cell ambient can be a cell controller

Windows Azure

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Environment

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Azure, Amazon Elastic Cloud, etc

Application Developer-Kinds of Ambient-Price-Energy-Resources

? CODE+DEPLOYMENT

Manager

-Monitor + Controls (Move+Replicate)

Further Challenges

Reconfiguration by including new resources on the cloud

Mobile Devices can become part of the cloud Security Development of the automation tools

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Thank youThank you

Questions?Questions?

Nour Ali, PhD.

Lero, The Irish Research Centre,University of LimerickIreland

Home page: http://www.lero.ie/staff/nali

Email: [email protected]

http://www.lero.ie/staff/nali

mailto:nourali@l

architectural solutions for the cloud

Technology

hybrid dev environment

generate executable code

east data center

service oriented architects

high abstract level

service oriented architecture

private cloud

cloud computing