20150514-vSphere6-ICM-Day4

20150514-vSphere6-ICM-Day4

Lesson 3: Migrating Virtual Machines

Migrating Virtual Machines

Types of migrations

• Cold
• Migrate a virtual machine that is power off.
• Suspended
• Migrate a virtual machine that is suspended
• vMotion
• Migrate a virtual machine that is power on
• vSphere Storage vMotion
• Migrate a virtual machine’s files, while the virual machine is powered on, to a different datastore.

Cross-Host vMotion = vMotion + Storage vMotion

Comparison of Migration Types

• 目前vSphere 6 Migration 都可以跨 vCenter Servers

How vSphere vMotion Migration Works

vMotion 的必要條件

• 要有 shared storage
• 要有vMotion Network ( 如果是長距離的 vMotion 不可以用預設的VMkernel Port, 要使用 vMotion 專用 )
• Virtual Machine Port Group

Notes:

• 同一台主機同時只能做兩個 Storage vMotion 或是 8 個 vMotion, ( 但是如果同時有進行vMotion 以及 Storge vMotion 就是 2 Storage vMotion + vMotion 與 6 vMotion )

vSphere vMotion Migration Requirements

• 不可以有 internal vSwitch(沒有 uplink 的vSwitch)
• 不可以連接到 virtual device ( such as a CD-ROM or floppy)
• A virtual machine must not have CPU affinity configured.( 不可以指定CPU)
• swap 必須被目的地主機存取的到
• If a virtual machine uses an RDM, the RDM must be accessible by the destination host.

vSphere Storage vMotion in Action

• 如果有支援 VAAI ( Enterprise  版本以上 ) 那就可以在Storage  直接搬移, 如果是 Standard 版本則是利用 ESXi 上的 Data Mover 來搬動, 有效能的差異.

Cross-Host vSphere vMotion

• 必須使用 Web Client 才能操作

Migration Between vCenter Server Instances

This type of migration requires:

• • •

• ESXi hosts and vCenter Server systems must be upgraded to vSphere 6.
• vCenter Server instances must be in Enhanced Linked Mode.
• Hosts must be time-synchronized.

vSphere vMotion TCP/IP Stacks

In vSphere 6, each host has a second TCP/IP stack dedicated to vSphere vMotion migration.

Network Checks for Migrations Between vCenter Server Instances

vCenter Server performs several network compatibility checks to prevent the following configuration problems:

• •MAC address compatibility on the destination host
• vSphere vMotion migration from a distributed switch to a standard switch
• vSphere vMotion migration between distributed switches of different versions
• •vSphere vMotion migration to an internal network, for example, a network without a physical NIC

Lab 14: Migrating Virtual Machines

• 進行 storage vMotion
• 建立 vSwitch 以及 VMkernel port group
• 執行 vMotion
• 執行 Cross-Host vSphere Storage vMotion

Lesson 4: Creating Virtual Machine Snapshots

Remove VM

• Remove from Inventory
• Delete from Disk

Lesson 5: Creating vApps

Managing Virtual Machines with a vApp

Create vApp

• Standalone Host
• DRS cluster

A vApp:

• Is a container for one or more virtual machines
• Can be used to package and manage related applications.

Lab 15: Managing Virtual Machines

Lab 16: Managing vApps

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