Sun Enterprise 10000 Dynamic Reconfiguration
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1. Complete the attach operation dr complete attach sb Verify that the DR attach operation has succeeded Type dr drshow sb The new system board should show in the list of configured boards Exit the dr shell dr gt exit Log in as root to the domain where you are adding the system board Enable the controller by entering 4 vxdmpadm enable ctlr Cllri When you have successfully attached and enabled the system I O board unfreeze any frozen service groups hagrp unfreeze Ser_grp_name Repeat for each service group Verify that VCS is still up and running Detaching CPU memory boards Note Use the following procedure if no I O devices on the system board are used Make sure the kernel cage enable variable is set 1 Freeze the VCS service groups running on the domain where you intend to detach a CPU Memory board Freezing the service groups prevents them from being taken offline or failed over Repeat the following command for each service group 4 hagrp freeze SE gip name Connect to the SSP server and log in to the domain whose system board requires Dynamic Reconfiguration DR ssp D1 echo SUNW HOSTNAME Enter the dr 1M shell ssp D1 dr In the window where you are running DR start detaching the I O board by entering dr gt drain sb Monitor the progress of the drain operation by entering dr gt drshow sb drain VCS Application Note Sun Enterprise 10000 Dynamic Reconfiguration 1 Dynam2. Veritas Cluster Server Application Note Sun Enterprise 10000 Dynamic Reconfiguration Solaris 5 0 9 symantec Veritas Cluster Server Application Note Sun Enterprise 10000 Dynamic Reconfiguration Copyright O 2006 Symantec Corporation All rights reserved Symantec the Symantec logo and Veritas are trademarks or registered trademarks of Symantec Corporation or its affiliates in the U S and other countries Other names may be trademarks of their respective owners The product described in this document is distributed under licenses restricting its use copying distribution and decompilation reverse engineering No part of this document may be reproduced in any form by any means without prior written authorization of Symantec Corporation and its licensors if any THIS DOCUMENTATION IS PROVIDED AS IS AND ALL EXPRESS OR IMPLIED CONDITIONS REPRESENTATIONS AND WARRANTIES INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE OR NON INFRINGEMENT ARE DISCLAIMED EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD TO BE LEGALLY INVALID SYMANTEC CORPORATION SHALL NOT BE LIABLE FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES IN CONNECTION WITH THE FURNISHING PERFORMANCE OR USE OF THIS DOCUMENTATION THE INFORMATION CONTAINED IN THIS DOCUMENTATION IS SUBJECT TO CHANGE WITHOUT NOTICE The Licensed Software and Documentation are deemed to be commercial computer software and commercial computer sof
3. disk controller is to be removed repaired and replaced The administrator disables the controller and the disk controller on SB1 automatically takes over because of the DMP functionality Using DR commands the administrator can detach or remove the board from the Domain A s configuration When this is complete the board can be physically removed Replacing the board a controller board in this case involves physically installing it and reconnecting it to the shared storage Reconfiguring the board requires using DR commands to attach it to the domain after which the controller can be re enabled Detaching I O system boards with DMP enabled Make sure the kernel_cage_enable variable is set 1 Freeze the VCS service groups running on the domain where you intend to perform DR operations Freezing the service groups prevents them from being taken offline or failed over Repeat the following command for each service group 4 hagrp freeze ser grip name 2 Connect to the SSP server and log in to the domain whose system board requires Dynamic Reconfiguration DR ssp D1 echo SUNW HOSTNAME 3 Enter the dr 1M shell ssp D1 dr 10 11 12 VCS Application Note Sun Enterprise 10000 Dynamic Reconfiguration 9 Dynamic reconfiguration in VCS environment To verify the board is an I O board enter dr drshow sb IO If the display lists the disks connected to the controller the system board is an I O board If th
4. agrp unfreeze Ser_grp_name Repeat for each service group 8 Verify that VCS is still up and running Using VM without DMP enabled If you have the Volume Manager DMP feature disabled for some or all of the disks in the shared storage and you must perform DR operations within the cluster we recommend using the VCS DiskReservation agent to guard against data corruption In the event of a split brain condition that is when two processors in a cluster can simultaneously write to the shared storage the DiskReservation agent ensures that only one processor has access to the storage at one time See the VCS Bundled Agents Reference Guide for information on configuring the DiskReservation agent
5. e system board is an I O board open another window and log in as root to the domain you are currently reconfiguring Disable the controller on the I O system board 4 vxdmpadm disable ctlr cilif In the window where you are running DR start detaching the I O board by entering dr drain sb Monitor the progress of the drain operation by entering dr drshow sb drain When you see the message Percent Complete 1003 0 KBytes remaining complete the detach operation dr complete detach sb To verify that the board is no longer configured type the following command dr drshow sb The detached board should not appear in the detailed listing Exit the dr shell dr exit If the board is not to be immediately replaced unfreeze any frozen service groups 4 hagrp unfreeze SEK gip name Repeat for each service group Attaching I O system boards with DMP enabled 1 Freeze the VCS service groups running on the domain where you intend to attach a system board Repeat the following command for each service group 4 hagrp freeze Ser_grp_name After physically replacing a previously removed I O board make sure it is connected to the shared storage From the SSP server enter the dr 1M shell ssp D1 dr 10 VCS Application Note Sun Enterprise 10000 Dynamic Reconfiguration Dynamic reconfiguration in VCS environment Follow the Sun procedure to attach the system board described here briefly dr init attach sb
6. ic reconfiguration in VCS environment 6 When you see the message Percent Complete 1003 0 KBytes remaining complete the detach operation dr complete detach sb 7 To verify that the board is no longer configured type the following command dr drshow sb The detached board should not appear in the detailed listing 8 Exit the dr shell dr gt exit 9 Ifthe board is not to be immediately replaced unfreeze any frozen service groups 4 hagrp unfreeze SEK gip name 10 Repeat for each service group Attaching CPU Memory boards Note Use the following procedure if none of the I O devices on the system board are used 1 Freeze the VCS service groups running on the domain where you intend to attach a system board Repeat the following command for each service group 4 hagrp freeze ser grip name 2 Physically replace the CPU Memory board 3 From the SSP server enter the dr 1M shell ssp D1 dr 4 Follow the Sun procedure to attach the system board described here briefly dr init attach sb Complete the attach operation dr complete attach sb 5 Verify that the DR attach operation has succeeded Type dr drshow sb The new system board should show in the list of configured boards 6 Exit the dr shell dr exit 7 When you have successfully attached the CPU Memory board unfreeze any frozen service groups 12 VCS Application Note Sun Enterprise 10000 Dynamic Reconfiguration Using VM without DMP enabled 4 h
7. mple a board with CPU or memory can be removed dynamically because another board has the equivalent functions Boards with I O controllers can be dynamically reconfigured as long as you use VxVM with the Dynamic Multipathing DMP feature to manage the shared storage Setting environment variable to enable DR Before performing DR operations on a domain you must first set the appropriate environment variable Enable the kernel cage variable for DR Using the Solaris 8 operating environment you must set the system 4 variable kernel cage enable to 1 enabled By default this variable is set to zero kernel cage disabled preventing DR Detach operations Edit the file etc system so that kernel cage enable equals 1 set kernel cage enable 1 Reboot the domain To verify the kernel cage is enabled check the file var adm messages Look for the message NOTICE DR Kernel Cage is ENABLED Detaching and attaching I O system boards In the configuration shown below VCS runs on Domains A and B with service groups online on Domain A Shared storage consists of a VXVM disk group with 8 VCS Application Note Sun Enterprise 10000 Dynamic Reconfiguration Dynamic reconfiguration in VCS environment Dynamic Multipathing DMP enabled Dynamic Reconfiguration of I O boards depends on DMP being configured for the storage DOMAIN A DOMAIN B gaH VO STORAGE In the example the system board SB3 which has a
8. tware documentation as defined in FAR Sections 12 212 and DFARS Section 227 7202 Symantec Corporation 20330 Stevens Creek Blvd Cupertino CA 95014 www symantec com Third party legal notices Third party software may be recommended distributed embedded or bundled with this Symantec product Such third party software is licensed separately by its copyright holder All third party copyrights associated with this product are listed in the accompanying release notes Solaris is a trademark of Sun Microsystems Inc Technical support For technical assistance visit http support veritas com and select phone or email support Use the Knowledge Base search feature to access resources such as TechNotes product alerts software downloads hardware compatibility lists and our customer email notification service VCS Application Note Sun Enterprise 10000 Dynamic Reconfiguration Introduction Supported hardware Supported software Dynamic reconfiguration in VCS environmen t Using VM without DMP enabled 6 Introduction VCS Application Note Sun Enterprise 10000 Dynamic Reconfiguration Introduction Supported This application note describes how to perform Dynamic Reconfiguration DR operations on VCS clustered system domains of the Sun Enterprise 10000 server The Solaris DR utility enables you to reconfigure the resources of system boards so that the boards can be replaced without system downtime Before
9. you can physically remove a board you must detach it or reconfigure it such that its resources can be disabled and removed from the domain configuration Likewise after you have physically replaced a board in a domain you must attach it or reconfigure it into the domain Note Currently VCS does not support using DR in clusters where I O controllers and storage use Sun s Alternate Pathing AP In a VCS cluster of domains it s possible that the DR operations in a domain might cause VCS to detect that resources are not available and to initiate failover to the other domain Therefore it is advisable to freeze the service groups running in the domain before running DR Do not use the following procedures to DR a system board containing a VCS private heartbeat link If you need to do so you must stop VCS before proceeding hardware m Sun Enterprise 10000 E10K Supported software m Solaris 8 9 and 10 m VERITAS Cluster Server version 2 0 3 5 4 0 and 4 1 m VERITAS Volume Manager VxVM as supported by the VCS version m VERITAS File System as supported by the VCS version VCS Application Note Sun Enterprise 10000 Dynamic Reconfiguration 7 Dynamic reconfiguration in VCS environment Dynamic reconfiguration in VCS environment The system board in a domain may contain I O controllers CPUs or memory Typically within a domain system boards have their functions duplicated on other system boards For exa
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