I am using PostgreSQL 10 rc1 in Docker.
Show commands return incorrect data directory location:
SHOW data_directory; returns /var/lib/postrgesql/data
SHOW config_file; returns /var/lib/postgresql/data/postgresql.conf
However, the data directory is completely empty.
Also when I run oid2name, it returns the following error:
"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"". It may be related to the first part
of the question.