eDirectory
OES Cluster Services
OES Storage Services (NSS)
The DNS server should be installed on all the nodes in cluster or on the nodes identified for running DNS
Create a NSS Shared Disk partition and cluster-enable it. For more information, refer to Configuring and Managing Cluster Resources for Shared NSS Pools and Volumes
in the OES 2018 SP2: OES Cluster Services for Linux Administration Guide.