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Virtualization 101:

Virtualization 101 Cloud Computing Instructor :- Arun Kumar Ojha

What is Virtualization?:

What is Virtualization?

Slide3:

Desktop Virtualization Server Virtualization Network Virtualization Storage Virtualization Application Virtualization

Vendors of Virtualization:

Vendors of Virtualization

Slide5:

Save money and energy Simplify management Benefits from Virtualization

Slide6:

VMware Workstation (Local) Microsoft Virtual PC (Local) Citrix XenDesktop (Centralized) Desktop Virtualization

Desktop Virtualization Architecture:

Desktop Virtualization Architecture Hardware Host OS Virtual Machine Manager Virtual Machine Guest OS (VMware ESX) Applications Virtual Machine Virtual Machine Guest OS (Windows) Guest OS (Linux) Applications Applications V i r t u a l P h y s i c a l

Components of Virtual Machines?:

Components of Virtual Machines? Configuration file Hard disk file(s) Virtual machine state file In-memory file

Comparison:

Comparison VMware Workstation Costs more More host & guests support Better features (Snapshots, USB) 64-bit hosts and guests Microsoft Virtual PC Free Less hosts & guests support Less VM features and capabilities

Uses:

Uses Development Testing Training

Server Virtualization:

Server Virtualization Software (SoftV) Hardware (HardV)

SoftV Server Virtualization:

SoftV Server Virtualization VMware Server

SoftV Server Virtualization Architecture:

SoftV Server Virtualization Architecture Hardware Host OS(Server Products) Virtual Machine Manager (Server Products) Virtual Machine Guest OS (VMware ESX) Applications Virtual Machine Virtual Machine Guest OS (Windows) Guest OS (Linux) Applications Applications V i r t u a l P h y s i c a l

HardV Server Virtualization:

HardV Server Virtualization Microsoft Virtual Server Citrix XenServer VMware ESX Server Microsoft Hyper-V Server VMware ESXi Server

HardV Server Virtualization Architecture:

HardV Server Virtualization Architecture Hardware Host OS Applications Guest OS (Windows) V i r t u a l P h y s i c a l Virtualization Layer Virtual Machine Applications Guest OS (Linux) Virtual Machine

HardV Server Virtualization Architecture:

HardV Server Virtualization Architecture Hardware Host OS + Virtualization Layer Virtual Machine Guest OS (VMware ESX) Applications Virtual Machine Virtual Machine Guest OS (Windows) Guest OS (Linux) Applications Applications V i r t u a l P h y s i c a l

HardV Server Virtualization Architecture:

HardV Server Virtualization Architecture Hardware Virtualization Layer (Hypervisor) Virtual Machine Guest OS (VMware ESX) Applications Virtual Machine Virtual Machine Guest OS (Windows) Guest OS (Linux) Applications Applications V i r t u a l P h y s i c a l

What is a hypervisor?:

What is a hypervisor? A hypervisor, also called a virtual machine manager (VMM), is a program that allows multiple operating systems to share a single hardware host. Each operating system appears to have the host's processor, memory, and other resources all to itself. However, the hypervisor is actually controlling the host processor and resources, allocating what is needed to each operating system in turn and making sure that the guest operating systems (called virtual machines) cannot disrupt each other.

ESX & ESXi:

ESX & ESXi ESX has a Service Console is based on Red Hat Enterprise Linux 3 (Update 6) that is heavily modified and stripped down and is used for management purposes. During the boot process the Service Console bootstraps the VMKernel using initrd and then turns over full control of all hardware resources to the VMkernel. When the VMkernel takes over the hardware resources of the host, the Service Console is warm booted and managed as a privileged virtual machine within the VMkernel. ESXi does not have a full Service Console but instead has a limited management console based on an implementation of the Posix variant of Unix within a Busybox framework and has many features that you will find in the full Service Console.

Techniques of VMware:

Techniques of VMware VMotion Storage VMotion High Availability Memory Reclamation

VMotion:

VMotion VMotion allows you to quickly move an entire running virtual machine from one host to another without any downtime or interruption to the virtual machine This is also known as a “ hot ” or “ live ” migration. The entire state of a virtual machine is encapsulated and the VMFS file system allows both the source and the target ESX host to access the virtual machine files concurrently. The active memory and precise execution state of a virtual machine can then be rapidly transmitted over a high speed network. The virtual machine retains its network identity and connections, ensuring a seamless migration process.

Storage VMotion:

Storage VMotion Storage VMotion is a new feature introduced in ESX 3.5, it allows you to migrate a running virtual machine and its disk files from one datastore to another on the same ESX host The difference between VMotion and Storage VMotion is that VMotion simply moves a virtual machine from one ESX host to another but keeps the storage location of the VM the same, Storage VMotion on the other hand changes the storage location of the virtual machine while it is running and moves it to another datastore on the same ESX host. The virtual machine can be moved to any datastore on the ESX host which includes local and shared storage.

High Availability (HA):

High Availability (HA) Continuously monitors all hosts in a cluster and restarts virtual machines affected by a host failure on other hosts Can also monitor guest OS's for a failure via a heartbeat and restart them on the same host in case of a failure Continuously monitors and chooses the optimal physical servers within a resource pool on which to restart virtual machines (if used in conjunction with DRS)

Any Query ?:

Any Query ? AMAZING TRAINING BASKET Plot No. A-40, 3rd Floor, A 301-302, I-Thum Tower, Sec 62, Noida E-MAIL : support@trainingbasket.in Website: www.trainingbasket.in Contact us on: Tel- 01202405511, Toll Free : 9015887887

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