Modify the DB Connection String of an LFC Host


First you need these five things:

  • <Intervention> Schedule an intervention in advance. Contact the GMOD for this.
  • <lfcNSCONFIG> The last version in SINDES of the lfcNSCONFIG.tar.gz file. Contact FIO for this.
  • <lxadm> Access to lxadm cluster. Ask someone with CDB access.
  • <SINDES> Access to SINDES. Ask someone with CDB access.
  • <DB support> You may need support from DB group to change the DB password.

Steps to Perform the Change

Update the lfcNSCONFIG file in SINDES

  • Connect to an lxadm machine.
  • Untar the lfcNSCONFIG.tar.gz and modify the passwordfile which is inside with the new string.
  • Build again the lfcNSCONFIG.tar.gz file and upload it to SINDES typing:
sindes-upload-file  -f lfcNSCONFIG.tar.gz -i lfcNSCONFIG --target gridlfc -S sindes-server -s cluster

Update first one of the two nodes which are behind the alias

  • Get the name of the 2 machines which are behind the alias:
host prod-lfc-atlas-central
host ip_number_1
host ip_number_2
  • Set the first one into maintenance:
sms set maintenance other "to change Oracle connection string" lfcxxx
  • Update the lfcNSCONFIG package via Sindes:
wassh root@lfcxxx sindes

Change the password of the DB account

  • Try to connect to the Oracle DB account with the old password and update it by yourself:
sqlplus account_name/my_old_pwd@db_name
SQL> alter user my_user_name identified by my_old_pwd REPLACE my_new_pwd;
  • If the step above failed, you should ask the DB group to expire the pwd of this account or change the pwd for you.
  • If they make it expire, just trying to login again with the old pwd, you will be forced to enter a new one.

Restart the LFC in the maintenance node and put it back to production

  • Go back to lxadm and restart the LFC:
wassh root@lfcxxx service lfcdaemon status
wassh root@lfcxxx service lfc-dli status
wassh root@lfcxxx service lfc-dli stop
wassh root@lfcxxx service lfcdaemon stop
wassh root@lfcxxx service lfcdaemon start
wassh root@lfcxxx service lfc-dli start
  • Check if the daemons are running with the new DB string:
wassh root@lfcxxx service lfcdaemon status
wassh root@lfcxxx service lfc-dli status
  • Put the node back in production:
sms set production other "after changing Oracle connection string" lfcxxx

Do the same for the second node

  • Put it in maintenance as explained above.
  • Update the lfcNSCONFIG package via Sindes as explained above.
  • Restart the LFC daemons as explained in the last point.
  • If the daemons are running fine, put this node back to production.

-- Main.dcollado - 14 Dec 2006

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Topic revision: r2 - 2006-12-15 - DavidCollados
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