[root@localhost core]# docker exec -ti core_db_1 bash
root@1d43dc8cfd6b:/# cd /var/lib/postgresql/data
root@1d43dc8cfd6b:/var/lib/postgresql/data# ls
base          pg_hba.conf    pg_replslot   pg_subtrans  postgresql.auto.conf
global        pg_ident.conf  pg_serial     pg_tblspc    postgresql.conf
pg_clog       pg_logical     pg_snapshots  pg_twophase  postmaster.opts
pg_commit_ts  pg_multixact   pg_stat       PG_VERSION   postmaster.pid
pg_dynshmem   pg_notify      pg_stat_tmp   pg_xlog