Issue: Creating Symlink for data directory of postgresql in CentOS7

Hi,
I'm trying to create a symlink for 'data' directory present in '/var/lib/pgsql/', pointing to different location.
After providing exact access permissions and ownership to postgres, I'm still unable to restart postgres after modifications.

I've also modified '/var/lib/pgsql/postgresql.conf' and '/usr/lib/systemd/system/postgresql.service' to point the $PGDATA location to the actual destination as respectively:

data_directory = '/data/postgresql/data'
Environment=PGDATA=/data/postgresql/data

Can you guys help ? I tried searching a solution for this problem but still couldn't get a perfect solution.

Here's what I'm seeing in:
>>> systemctl status postgresql.service

postgresql.service - PostgreSQL database server
Loaded: loaded (/usr/lib/systemd/system/postgresql.service; enabled; vendor preset: disabled)
Active: failed (Result: exit-code) since Fri 2019-07-12 10:00:51 UTC; 38s ago
Process: 8852 ExecStartPre=/usr/bin/postgresql-check-db-dir ${PGDATA} (code=exited, status=1/FAILURE)
Main PID: 29483 (code=exited, status=0/SUCCESS)

Jul 12 10:00:51 systemd[1]: Starting PostgreSQL database server...
Jul 12 10:00:51 systemd[1]: postgresql.service: control process exited, code=exited status=1
Jul 12 10:00:51 systemd[1]: Failed to start PostgreSQL database server.
Jul 12 10:00:51 systemd[1]: Unit postgresql.service entered failed state.
Jul 12 10:00:51 systemd[1]: postgresql.service failed.

>>> /var/log/messages

Jul 12 10:00:51 systemd: Starting PostgreSQL database server...
Jul 12 10:00:51 postgresql-check-db-dir: "/data/postgresql/data" is missing or empty.
Jul 12 10:00:51 postgresql-check-db-dir: Use "postgresql-setup initdb" to initialize the database cluster.
Jul 12 10:00:51 postgresql-check-db-dir: See /usr/share/doc/postgresql-9.2.24/README.rpm-dist for more information.
Jul 12 10:00:51 systemd: postgresql.service: control process exited, code=exited status=1
Jul 12 10:00:51 systemd: Failed to start PostgreSQL database server.
Jul 12 10:00:51 systemd: Unit postgresql.service entered failed state.
Jul 12 10:00:51 systemd: postgresql.service failed.

-Shibayan

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