Overview
Because my Cloud Control is only used for testing purposes, there is no need to keep the data in the OMR. So, in order to install EM12CR3, I will have to de-install EM12CR1 first. I also took the chance to clean up the rest of the Oracle inventory, and ended up by cleaning up everything.
References
- Oracle Support Document 1428956.1 (EM 12c: How to De-install Enterprise Manager Cloud Control 12c (12.1.0.1.0 or 12.1.0.2.0))
- Oracle® Fusion Middleware Installation Guide for Oracle Web Tier 11g Release 1 (11.1.1)
De-install OMS and OMA
Use the Graphical Mode
Go to the original directory from whence the software was installed:
cd /opt/oracle/software/em12
Run OUI in deinstallation mode:
./runInstaller -deinstall
The following screen appears:
Click Installed Products to go to the Inventory which then appears as:
Step #11: Remove OMS and Agent Plug-Ins
As per step #11 of Deinstalling in Graphical Mode in Oracle Support Document 1428956.1 , the following items are selected:
Click Remove and the following confirmation screen appears:
Click Yes
The updated inventory screen reappears. Click Close to return to the first screen, and press Cancel to return to the command line.
Step #12: Remove sbin12c1 and webtier12c1 Homes
Repeat the above process to get the inventory where the following items are selected as per step #12 of Deinstalling in Graphical Mode in Oracle Support Document 1428956.1 .
There is no need to go out and back in again. One has to be patient until all the items in the inventory list become enabled again. One can also watch the terminal output to see the products that are being de-installed.
Step #13: Remove agent12c1 and common12c1 Homes
The following items are selected as per step #13 of Deinstalling in Graphical Mode in Oracle Support Document 1428956.1 .
However, I got the following error because I was too impatient earlier on:
Oracle Home "/opt/oracle/app/OracleHomes/agent12g/core/12.1.0.1.0" is being deinstalled ..
The home /opt/oracle/app/OracleHomes/agent12g/core/12.1.0.1.0 cannot be deinstalled. Please deinstall all referenced home(s) /opt/oracle/app/OracleHomes/agent12g/core/12.1.0.1.0/../../plugins/oracle.sysman.vt.agent.plugin_12.1.0.2.0 before deinstalling selected home.
That error was corrected in two (2) steps.
Because of the next step, I have to exit the OUI.
Clean Up of Other Homes
I took this opportunity to clean up two (2) other homes:
Remove the old 10G Oracle Home
Since I had upgraded the OMR to 11.2, I can now remove the old home as follows:
/opt/oracle/app/OracleHomes/db10g/oui/bin/runInstaller -deinstall
Remove the 10G Agent Home
Since I am intending to install OMA 12CR3 once I have finished deinstalling OMS 12CR1, I can remove the old agent home as follows:
/opt/oracle/software/Linux_Grid_Control_full_102010/runInstaller -deinstall
Step #14: De-install WebLogic
According to step #14 of Deinstalling in Graphical Mode in Oracle Support Document 1428956.1 , I need to use the uninstaller for WebLogic. My reference is 3 Deinstalling Oracle Web Tier .
However, there is a problem as the WebTier home was de-installed as part of Step #12 above.
Step #15: Remove JDK Home
Back to running the de-installation of EM12CR1 as follows:
/opt/oracle/software/em12/runInstaller -deinstall
The following option is selected:
Step #16: Remove the oms12c1 home
The oms12g1 home is removed.
Remove Grid Home
Run the following command to remove Grid 11G:
/opt/oracle/11.2.0.3/grid/oui/bin/runInstaller -deinstall
The log is attached as deinstall_grid_11G.log