Database runInstaller "Nodes Selection" Window Does not Show RAC Nodes

Oracle Clusterware (CRS or GI) is up and running as confirmed by $CRS_HOME/bin/crsctl check crs on all nodes, and $CRS_HOME/bin/olsnodes -n show all the nodes, but database runInstaller does not show all cluster nodes.

There might be an issue with the Inventory for Clusterware home.

Look at inventory.xml file under the oraInventory/ContentsXML directory.
It should show CRS="true" against the correct CRS or GI home and only one entry should have CRS="true" even if there are multiple (older) CRS or GI homes listed.

Do not update the inventory.xml manually. Use the below commands to fix the issue.

$GRID_HOME/oui/bin/runInstaller -silent -ignoreSysPrereqs -updateNodeList ORACLE_HOME="/opt/app/oragrid/oracle/product/11.2.0.3" LOCAL_NODE="myracd1" CLUSTER_NODES="{myracd1,myracd2}" CRS=true

Change the LOCAL_NODE to point to the node from where you are running the command. This needs to be run from every node where you want the inventory.xml updated.

If another CRS_HOME also has CRS="true" as in example below.

then use the below command to set it to false.

$GRID_HOME/oui/bin/runInstaller -updateNodeList ORACLE_HOME="/opt/app/t5cim1d/oracle/product/crs" CRS=false

Oracle Notes 1327486.1 and 1053393.1 has more details.