Unable to connect to postgres Cluster from python-Shell Script

Hello All,

I have created simple python-shell script as mentioned below code is running fine from my local system and I am also able to connect to cluster from my local system.

But when try running python-shell script as glue then getting following error:

import sys
import psycopg2


rds_host  = "hostname"
name = "aaaaaaa"
password = "XXXXXXX"
db_name = "bbb"
conn = psycopg2.connect(host=rds_host, user=name, password=password, dbname=db_name)

with conn.cursor() as cur:
   query="CALL test_vals()"
   cur.execute(query)
   conn.commit()
   cur.close()

cloudwatch error log

    conn = _connect(dsn, connection_factory=connection_factory, **kwasync)
psycopg2.OperationalError: could not connect to server: Connection timed out
	Is the server running on host "hostname" (XX.XXX.XX.XX) and accepting
	TCP/IP connections on port 5432?


During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/tmp/runscript.py", line 215, in <module>

I have not added any Connections in job properties .

Please help .