You can use Oracle Fleet Patching and Provisioning to upgrade Oracle Grid infrastructure that has Grid Infrastructure Management Repository (GIMR) configured.

1. Import the Oracle Grid Infrastructure image of the version that you want to upgrade to 21c with the rhpctl import image command.

2. Import the Oracle Database image of the version that you want to upgrade to 21c with the rhpctl import image command.

3. Add a software only Oracle Grid Infrastructure working copy with the rhpctl add workingcopy command using the -softwareonly flag.

4. Add the database working copy for the GIMR upgrade with the rhpctl add workingcopy command using the -gimr flag. The owner of the database working copy must be the same as the owner of the Oracle Grid Infrastructure working copy.

   This use of the rhpctl add workingcopy command is only used by GIMR, and cannot be used to provision customer databases.

5. Upgrade both the Oracle Grid Infrastructure and GIMR homes with a single rhpctl upgrade gihome command using the -gimrwc gimr_wc option, where gimr_wc specifies the working copy created in the previous step (step 4).