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Virtual Virtualisation. Got no money? Fear not! There is a way…. Why would you bother. Scenario – Server down No DNS/DHCP Problems with login No LDAP No access to files from outside No administration/imaging software No printing - ouch!. Disaster recovery - Services.

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Presentation Transcript
virtual virtualisation

Virtual Virtualisation

Got no money? Fear not! There is a way…

why would you bother
Why would you bother

Scenario – Server down

  • No DNS/DHCP
  • Problems with login
  • No LDAP
  • No access to files from outside
  • No administration/imaging software
  • No printing - ouch!
disaster recovery services
Disaster recovery - Services

Replacing a corrupt server

1

VM1

2

VM2

VM3

VM4

Virtualisation Software

Backup of VMs

on external HDD

Host OS

disaster recovery data

1

VM1

2

VM2

VM3

VM4

Virtualisation Software

Host OS

Disaster Recovery - Data

Restoring access to data volumes

Copy server and connect to data volume

V1

V2

V3

V4

Fibre switch

Virtualised Server

SAN

disaster recovery the lot
Disaster Recovery – The Lot
  • Source hardware
  • Download Linux from Internet or buy DVDs
  • Restore servers from external HDD
  • Copy data from backup server
  • Away we go!
how can it be done
How can it be done?

Hardware with VT technology and plenty of RAM

Scenario 1 - VMware

  • Mainstream Linux or Windows
  • VMware free server
  • Scenario 2 - XEN
  • SUSE Linux OES2 with Xen

VM1

VM2

VM3

VM4

VMware

Linux or Windows

VM1

VM2

VM3

VM4

Linux with XEN

installation of vms
Installation of VMs
  • Install your host OS (Domain 0)
  • Install VMware server for Linux or Windows or use XEN Virtual Machine Manager
  • Create virtual machine (specify RAM and HDD allocation)
  • Install OS on VM
  • Install apps
  • Clone your VM as many times as you like
redundant virtualised server

1

1

VM5

VM1

2

2

VM2

VM6

VM3

VM7

VM4

VM8

Virtualisation Software

Virtualisation Software

Host OS

Host OS

Redundant virtualised server

Server 1

Server 2

hardware failure
Hardware failure

VM1

VM2

2

VM3

VM4

VM5

1

2

VM6

VM7

VM8

Virtualisation Software

Virtualisation Software

Host OS

Host OS

Server 1

Server 2

virtualised server with san guest os on san

1

VM1

2

VM2

VM3

VM4

Virtualisation Software

Host OS

Virtualised server with SAN Guest OS on SAN

V1

Guest

OS

V2

Data

V3

Data

V4

Data

Fibre switch

guest os on virtual machine

1

VM1

OS

2

VM2

OS

VM3

OS

VM4

OS

Virtualisation Software

Host OS

Guest OS on Virtual Machine

V1

Data

V2

Data

V3

Data

V4

Data

Fibre switch

why else would you do it
Why else would you do it
  • Install app on real server hardware after trial
  • Refresh hardware
  • Legacy software
  • Clone servers
  • Get a new server for the price of more RAM!
slide20

Contact Details

Renate McKenzie

Director of ICT

Roseville College

rmckenzie@roseville.nsw.edu.au