Definitions. Hardware Full virtualization Para virtualization Hosted hypervisor Type I hypervisor. Native (bare metal) hypervisor Type II hypervisor

Transcription

1 Virtualization

2 Objectives Definitions Why Problems Versions Virtualization vs Cloud Creating a New Virtual Machine Working with a Virtual Machine Virtual Machine Settings Virtual Machine Snapshots

3 Definitions Hardware Full virtualization Para virtualization Hosted hypervisor Type I hypervisor Native (bare metal) hypervisor Type II hypervisor

4 Why Servers can be consolidated into virtual machines A typical company may have dozens of servers, DNS, Web, File, Print, DHCP, Directory and the list goes on and on Companies can save space and money with virtualization Electricity and cooling Flexibility

5 Why Multiple applications and operating systems can be supported within a single physical system Testing Do not have to have multiple physical machines Students Does not require multiple systems and/or long setup time to learn different subjects

6 Why Virtual machines are completely isolated from the host machine and other virtual machines This means no possibility of undesired interactions If one server (service) crashes this does not effect any of the others Student Benefit If Joe Bob Classmate accidentally types delete all he only messes up his own system, not yours

7 Why Complete virtual machine environment is saved as a single file Makes backups simple Makes testing easier Make it simple to duplicate servers across multiple sites

8 Why Standardized virtualized hardware is presented to the application

9 Problems Slow Conceptualization Cost

10 Versions VMWare Free Player Server 1.x Server 2.x Server ESXi Pay Workstation VSphere

11 Versions Microsoft Free Hyper-V Virtual PC Pay System Center Azure Amazon EC2 VirtualBox Xen KVM

12 Virtualization vs Cloud IaaS Infrastructure as a Server Servers, storage and processing PaaS Platform as a Service Development environment Access to services such as database or web server SaaS Software as a Service End user applications Google Apps

13 Virtualization vs Cloud The cloud is: Elastic Shared Usage-based Supports many devices So is Virtualization Self-provisioning Virtualization is all self provisioned

14 Creating a New Virtual Machine Select name Select type of OS Select version of OS OS settings define some hardware settings Cannot be changed while powered on

15 Creating a New Virtual Machine Select Memory Overprovision, shared RAM and ballooning

16 Creating a New Virtual Machine Hard drive creation options

17 Creating a New Virtual Machine Hard drive file type

18 Creating a New Virtual Machine Storage type Thick Thin

19 Creating a New Virtual Machine Name and size

20 Working with a Virtual Machine Starting

21 Working with a Virtual Machine Mouse trapped in machine Ctrl+Alt+Del

22 Working with a Virtual Machine Shutdown Like a real machine you should shutdown in an orderly fashion

23 Working with a Virtual Machine Shutdown Other options

24 Virtual Machine Snapshots General - Basic

25 Virtual Machine Settings System Motherboard

26 Virtual Machine Settings Storage Add hard drives Mount ( Connect ) to CD/DVD images ( ISO files )

27 Virtual Machine Settings Network Multiple adapters Attached to: ( Virtual Networks ) NAT Bridged eth0 tap0 Internal Name Host-only

28 Virtual Machine Settings Drivers

29 Virtual Machine Snapshots Saves a copy of the machines hard drive(s) at a point in time Can consume large amounts of disk space Contains all differences between the snapshot and the current system Differencing disk contains all changed data blocks Also known as checkpoints Can have multiple snapshots

30 Virtual Machine Snapshots Choices Take snapshot Restore snapshot Deletes changes! Delete snapshot Makes changes permanent! Clone (Copy) MAC address Full Linked Can also create appliance

31 Summary Definitions Why Problems Versions Virtualization vs Cloud