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Use CRSCTL to change an existing Oracle Clusterware standard Cluster to an Oracle Flex Cluster.

Perform the following steps:

  1. Run the following command to determine the current mode of the cluster: 
    $ crsctl get cluster mode status
  • Run the following command to ensure that the Grid Naming Service (GNS) is configured with a fixed VIP:
$ srvctl config gns

This procedure cannot succeed unless GNS is configured with a fixed VIP. If there is no GNS, then, as root, create one, as follows:

# srvctl add gns -vip vip_name | ip_address

Run the following command as root to start GNS:

  • # srvctl start gns
  • Use the Oracle Automatic Storage Management Configuration Assistant (ASMCA) to enable Oracle Flex ASM in the cluster before you change the cluster mode.
  • Run the following command as root to change the mode of the cluster to be an Oracle Flex Cluster: 
    # crsctl set cluster mode flex
  • Stop Oracle Clusterware by running the following command as root on each node in the cluster: 
    # crsctl stop crs
  • Start Oracle Clusterware by running the following command as root on each node in the cluster:
# crsctl start crs -wait

Note:

Use the -wait option to display progress and status messages.