Stateless Computing with UCSM and VMwareAutoDeploy – Best PracticesJohn Kennedy TME SAVTG
What does “Stateless” mean?Stateless vs. Statefull§  Statefull := stuck to the                                           ...
How does Cisco UCS enable stateless computing?Service profile basics§  UCS hardware can have any MAC, WWPN, UUID applied ...
What are the benefits of Stateless Computing?Allows migration of server functionality§  Simplified provisioning§  Upgrad...
How does UCS enable stateless computing?By overriding the servers current WWPN, MAC, UUID, etc.§  UCS applies a “Service ...
But Doesn’t VMware enable Stateless Computing?Yes, with vSphere AutoDeploy§  Server boot from the network, not a SAN or l...
AutoDeploy basicsPresentation_ID   © 2010 Cisco and/or its affiliates. All rights reserved.   Cisco Confidential
Frailties of vSphere AutoDeploy§  Requires DHCP, TFTP, all must be managed§  If AutoDeploy server fails, ESXi servers ca...
New Feature in vSphere 5.1: Statefull AutoDeploy§  Allows AutoDeploy to leave a copy of the ESXi server state on a local ...
Does AutoDeploy conflict with Service Profiles?The two work together…§  When a Service Profile moves to another server, v...
UCSM enhancements for vSphere AutoDeployPresentation_ID   © 2010 Cisco and/or its affiliates. All rights reserved.   Cisco...
Best PracticesSpecific to this topic…§  Make your AutoDeploy, DHCP, and TFTP highly available!§  Ensure the IPMI address...
Best PracticesSpecific to this topic…§  Set your boot order profile to boot from:             CDROM (for troubleshooting)...
In summary§  vSphere AutoDeploy 5.1 lets the ESXi server retain state on the local    disk             But that’s not goo...
Where can I learn more?§  AutoDeploy documentation             http://bit.ly/OgLlZj§  VMware KB article 2005131         ...
Questions?Presentation_ID   © 2010 Cisco and/or its affiliates. All rights reserved.   Cisco Confidential
Best Practice for using vSphere AutoDeploy with Cisco UCS
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Best Practice for using vSphere AutoDeploy with Cisco UCS

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Best Practice for using vSphere AutoDeploy with Cisco UCS

  1. 1. Stateless Computing with UCSM and VMwareAutoDeploy – Best PracticesJohn Kennedy TME SAVTG
  2. 2. What does “Stateless” mean?Stateless vs. Statefull§  Statefull := stuck to the §  Stateless := free to migrate hardware where needed Maybe the OS is installed on a Nothing in the hardware prevents local disk, that isn’t replicated… the software from running on other Maybe an Application depends on hardware a burned in identifier, like WWPN MAC addresses, WWPN, etc. or MAC or UUID… move from machine to machine based on the needs of the businessPresentation_ID © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential
  3. 3. How does Cisco UCS enable stateless computing?Service profile basics§  UCS hardware can have any MAC, WWPN, UUID applied to it through software§  Choose layout§  Then select the layout with the background you would likePresentation_ID © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential
  4. 4. What are the benefits of Stateless Computing?Allows migration of server functionality§  Simplified provisioning§  Upgrades of hardware§  Migration to a new datacenter Without a forklift…§  Disaster recoveryPresentation_ID © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential
  5. 5. How does UCS enable stateless computing?By overriding the servers current WWPN, MAC, UUID, etc.§  UCS applies a “Service Profile” XML collection of metadata§  Service Profile is centralized, for ease of management§  Service Profiles can be removed from one server and applied to another Host OS, Applications, Network and Storage cannot tell the difference§  Service Profiles can be created from Service Profile Templates Repeatability, ease of management, reliability… When Template is updated, attached profiles get the updates.Presentation_ID © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential
  6. 6. But Doesn’t VMware enable Stateless Computing?Yes, with vSphere AutoDeploy§  Server boot from the network, not a SAN or local disk§  State data kept in Host Profiles§  Allows Elastic Capacity on DemandPresentation_ID © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential
  7. 7. AutoDeploy basicsPresentation_ID © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential
  8. 8. Frailties of vSphere AutoDeploy§  Requires DHCP, TFTP, all must be managed§  If AutoDeploy server fails, ESXi servers can’t reboot§  In the event of a Power outage, AutoDeploy has to be running before ESXi can boot from it.§  If AutoDeploy is running in a VM… Chicken? Egg?Presentation_ID © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential
  9. 9. New Feature in vSphere 5.1: Statefull AutoDeploy§  Allows AutoDeploy to leave a copy of the ESXi server state on a local disk FlexFlash© , SATA drive, …§  If server reboots, and AutoDeploy or vCenter isn’t available, server retains it’s identity.§  When AutoDeploy is available, reboot the server, and it is once again stateless.Presentation_ID © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential
  10. 10. Does AutoDeploy conflict with Service Profiles?The two work together…§  When a Service Profile moves to another server, vCenter and AutoDeploy don’t see a new MAC or IP address ESXi server retains it’s host profile, and it’s state§  When a Service Profile moves to another server, the local disk can be “scrubbed” Assumes you use a Full Scrub profile in UCS, so be sure you do…§  This is an advantage of current servers!Presentation_ID © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential
  11. 11. UCSM enhancements for vSphere AutoDeployPresentation_ID © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential
  12. 12. Best PracticesSpecific to this topic…§  Make your AutoDeploy, DHCP, and TFTP highly available!§  Ensure the IPMI address stays with the profile Enables Distributed Power Management§  Make DHCP reservations for your Service Profiles§  Make individual Host Profiles for each Service Profile§  Set your Host Profiles to use Stateless Install on local disk FlexFlash is available on C series only§  Don’t move B series SP to C series or vice versaPresentation_ID © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential
  13. 13. Best PracticesSpecific to this topic…§  Set your boot order profile to boot from: CDROM (for troubleshooting) vNICA (Best to use just one…) Local disk§  Set your vNIC to use the default VLAN Otherwise, either DHCP or gPXE will breakPresentation_ID © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential
  14. 14. In summary§  vSphere AutoDeploy 5.1 lets the ESXi server retain state on the local disk But that’s not good if you want to repurpose that server You have to scrub the server yourself The replacement server will have a new MAC, new IP, and won’t look the same to vCenter§  But with UCS Service Profiles, the MAC, WWPN, etc. go on whatever server you wish So your ESXi server remains available after moving to a new piece of hardwarePresentation_ID © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential
  15. 15. Where can I learn more?§  AutoDeploy documentation http://bit.ly/OgLlZj§  VMware KB article 2005131 http://bit.ly/OgLH27§  Cisco UCS solutions http://www.cisco.com/go/ucs§  TEX2815-vCenter Orchestrator Plug-in for Self-Scaling Data Center Wednesday, Aug 29, 2:00 PM - 3:00 PM Moscone South, Level 3, Room 310Presentation_ID © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential
  16. 16. Questions?Presentation_ID © 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential

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