Connect to your RDS database that was created by Elastic Beanstalk

eb-rds-psql.sh

#!/bin/bash -ex

# ssh-add ~/path/to/aws-key-file.pem

LOCAL_PORT=${1:-15432}
EB_ENV=`mktemp`
trap 'rm -f $EB_ENV; exit' SIGINT SIGQUIT SIGKILL SIGTERM
# See https://serverfault.com/a/883673/373074
eb ssh --quiet -e 'ssh' -c 'cat /opt/python/current/env' > "$EB_ENV"

source "$EB_ENV"
rm -f "$EB_ENV"

# See https://gist.github.com/scy/6781836
eb ssh --quiet -e "ssh -L $LOCAL_PORT:$RDS_HOSTNAME:$RDS_PORT -o ExitOnForwardFailure=yes -T -f" -c 'sleep 10'

# If running psql on remote machine:
#. /opt/python/current/env
#export PGHOST="$RDS_HOSTNAME"
#export PGPORT="$RDS_PORT"

# If running psql here, on local machine:
export PGHOST="localhost"
export PGPORT="$LOCAL_PORT"

export PGPASSWORD="$RDS_PASSWORD"
export PGUSER="$RDS_USERNAME"
export PGDATABASE="$RDS_DB_NAME"
#export PGSSLMODE=disabled

# psql has to attempt connection in the 10 seconds after the ssh tunnel command returns (i.e. when the tunnel is established and the sleep command is still running)
exec psql