[NOVICE] using LDAP for connection information lookup to do remote databaseconnection

Hi all,

                Is it passable to use LDAP for connection string lookup when try to connect to remote database using psql?  I have client install on my work station and my LDAP entry for remote postgresql database looks like this:

cn=pgrls,cn=OracleContext

cn=pgrls

objectclass=orclDBServer

objectclass=top

objectclass=orclService

description=host=pgrls.cy53k5nd.us-east-1.rds.amazonaws.com

description=port=5439

description=dbname=pgrls

And my .pg_service.conf

ldap://oid.ldap.cornell.edu:389:636/cn=OracleContext?description?one?(cn=pgrls)

When

> psql pgrls

psql: could not connect to server: No such file or directory

                Is the server running locally and accepting

                connections on Unix domain socket "/var/run/postgresql/.s.PGSQL.5432"?

Can anyone guide me through how to?

Thank you very much,

Garry