Exadata Patching - Cell Server

Cell storage patching can be done by patchmgr utility which is used to do a patching in rolling as well in non-rolling fashion.

Syntax: ./patchmgr -cells cell_group -patch [-rolling] [-ignore_alerts] [- smtp_from "addr" -smtp_to "addr1 addr2 addr3 ..."]

Here addr is the sending mail id which is used to send status of patching and addr1,addr2,addr3 are receiving mail id to receive the status of patching.

Step-1  First note down the current image version of cell by executing 

#imageinfo

Step-2  Go to cell patch directory where patch has been copied

/19625719/Infrastructure/11.2.3.3.1/ExadataStorageServer_InfiniBandSwitch/patch_11.2.3.3.1.140708

Step-3  Reset the server to a known state using the following command

./patchmgr -cells cell_group -reset_force

Step-4  Clean up any previous patchmgr utility runs using the following command

./patchmgr -cells cell_group -cleanup

Step-5 Verify that the cells meet prerequisite checks using the following command

(Rolling)

./patchmgr -cells ~/cellgroup -patch_check_prereq -rolling 

or

(Non-rolling)

./patchmgr -cells ~/cellgroup -patch_check_prereq 

Here cellgroup file contains IPs of all cell server.

Step-6  Output should not have any error, If any error than resolve it first than re-execute above command

Step-7 Patch cell server

(Rolling)

./patchmgr -cells ~/cellgroup -patch -rolling

or

(Non-rolling)

./patchmgr -cells ~/cellgroup -patch

Step-8  Check logs if any error in patchmgr.stdout file.

How it works?

Entire patching activity done by patchmgr utility automatically.

• To ensure good backup exists, USB recovery media is recreated 
• Check cells have ssh equivalence for root user
• Initialize files, check space and state of cell services
• Copy, extract prerequisite check archive to cells 
• Check prerequisites on cell
• Copy the patch to cell
• Execute plug-in check for Patch Check Prereq
• Initiate patch on cell
• Reboot the cell
• Execute plug-in check for Patching
• Finalize patch
• Reboot the cell
• Check the state of patch
• Execute plug-in check for Post Patch
• Done

After completion of patching you can check the image version, it should be changed to new version

#imageinfo
#imagehistory

Rollback

Step-1  Disable writeback flash cache (You can refer Oracle DOC ID - 1500257.1)

Step-2  Check rollback pre-requisites

(Rolling)

./patchmgr -cells ~/cellgroup -rollback_check_prereq -rolling -ignore_alerts

or

(non-rolling) 

./patchmgr -cells ~/cellgroup -rollback_check_prereq -ignore_alerts  

Step-3  Perform the rollback

(Rolling)


./patchmgr -cells ~/cellgroup -rollback -rolling -ignore_alerts  

or 

(Non-Rolling)

./patchmgr -cells ~/cellgroup -rollback -ignore_alerts 

Step-4  Clean up the cells using the -cleanup option to clean up all the temporary patch or rollback files on the cells

./patchmgr -cells ~/cellgroup -cleanup


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