星期四, 5月 14, 2015

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


-- 上午課程結束 --

下午處理公事無法上課  Orz….

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