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Virtual Virtualisation

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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Virtual Virtualisation

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  1. Virtual Virtualisation Got no money? Fear not! There is a way…

  2. 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!

  3. Disaster recovery - Services Replacing a corrupt server 1 VM1 2 VM2 VM3 VM4 Virtualisation Software Backup of VMs on external HDD Host OS

  4. 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

  5. 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!

  6. 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

  7. 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

  8. How to do it

  9. 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

  10. 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

  11. 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

  12. 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

  13. 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!

  14. Contact Details Renate McKenzie Director of ICT Roseville College rmckenzie@roseville.nsw.edu.au

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