IntroductiontoVirtualization

Hans-PetterHalvorsen,M.Sc.

WhatisVirtualization?

Hans-PetterHalvorsen,M.Sc.

VirtualizationComputer

VirtualizationSoftware

...

...

...

OperatingSystem(OS),e.g.,Windows,Linux,OSX

SoftwareApplications

VirtualM

achine

s

VirtualizationSoftware(e.g.,VMware,HyperV,VirtualBox,...)

OperatingSystem(OS),e.g.,Windows,Linux,OSX

SoftwareApplications

WhydoweneedVirtualization?• TypicallyyouuseVirtualizationwhenyouneedtotestnewOperatingSystems(OS)orSoftware.

• TheSoftwareyouwanttotestcanbecreatedbyyouorbyothers

• YouwanttorunWindowsonaMacComputer• etc.

Virtualization

OperatingSystem(OS)

VirtualizationSoftware

Hypervisor

VM VM VM

Hardware(Computer)

VM VM VM

Guests

Host

VM=VirtualMachines

AHypervisorcanrundirectlyonthecomputerwithoutaHostOS

Windows,Linux,...

Windows,Linux,...

VirtualizationSoftwareAlotofVirtualizationSoftwareexists.Herearesomeexamples:• VMwareWorkstation• VMwareWorkstationPlayer (Freeofchargeandsimpleto

use)• VMwarevSphereandvSphereHyperVisor• VMwareFusion(Mac)• ParallelsDesktop(Mac)• MicrosoftHyper-V• VirtualBox• etc.

WhyDoWeNeedaTestEnvironment?

WhycantwejustuseourownPC?

WhyTestEnvironment?• “ItworksonmyPC”saystheDeveloper• CleanEnvironment• OntheDevelopersPCswehaveallkindofSoftwareinstalledthat

theCustomerdonthave,e.g.DevelopmentToolslikeVisualStudio,etc.

• WeneedtotestondifferentPlatformsandOperatingSystems• CustomersmayusedifferentWebBrowsers• Deployment:TestofInstallationpackages• MakethesoftwareavailableforTesters• etc.

Development Testing Production

DevelopmentEnvironment TestEnvironment

ProductionEnvironment

TypicallytheDevelopersPersonalComputerwithDatabase,WebServerandProgrammingSoftware

ACleanPC/Server(oranetworkwithPCsandServers)whereyouinstallandtestyourSoftware.Todaywetypicallyset-upaVirtualTestEnvironment

TheCustomersenvironmentwhereyouunstallthefinalsoftware(ServersandClients)

ProgrammingenvironmentssuchasVisualStudio,etc.shouldnotbeinstalledinthisenvironment.Youneedtocreate.exefilesetc.inordertomakeyoursoftwarerun.

Developers Developers&Testers Customersuntilfinished

VMwareWorkstationPlayer

Hans-PetterHalvorsen,M.Sc.

Downloadforfreefromthiswebsite:http://www.vmware.com

VMwareWorkstationPlayerVMwareWorkstationPlayerisforpersonaluseonyourownPC.VMwarePlayerisfreeofchargeforpersonalnoncommercialuse.

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VMwareisacompanythathasbeenspecializingwithinvirtualizationsoftware.http://www.vmware.com

LetsCreateaVirtualMachinefromScratch

Hans-PetterHalvorsen,M.Sc.

UniversityCollegeofSoutheastNorwaywww.usn.no

E-mail:hans.p.halvorsen@hit.noBlog:http://home.hit.no/~hansha/