sshtunelforwarder

import os
from sshtunnel import SSHTunnelForwarder

def connect_tunnel():
    local_port = 4599
    os.system("kill $( lsof -i:{} -t )".format(local_port))
    with SSHTunnelForwarder(
        ('34.230.115.45', 22),       # Remote server ip and port
        ssh_username="jerry",
        ssh_pkey="/Users/jerry/.ssh/id_ali.rsa",
        ssh_private_key_password="aliyun",
        remote_bind_address=('127.0.0.1', 27017),        
        local_bind_address=('0.0.0.0', local_port),
        set_keepalive = 3
    ) as server:
        server.start() #start ssh server
        print('Server connected via SSH')
        
        # Connect to PostgreSQL
        local_port = str(server.local_bind_port)
    return local_port