Following workround might be helpful to check if is "production" or "local":

def _check_environment_is_production(self):
    web_base_url = self.env['ir.config_parameter'].sudo().get_param('web.base.url')
    localhost_names = ['localhost']
    return False if not web_base_url or any(x in web_base_url for x in localhost_names) else True

Try this one

from openerp import api, models

_logger = logging.getLogger(__name__)

import xmlrpclib

class TestConnection(models.Model):

    _name = "test.connection"   

    @api.model

    def check_connection(self):        

        url = url

        db = db_name

        username = db_user

        password = db_password

        try:

            common = xmlrpclib.ServerProxy('{}/xmlrpc/2/common'.format(url))

            common.version()

            ### connection established, do your logic

        except:

            _logger.warning('*********Unable to connect the server ***********')

            ### connection Failed

Does anyone have an answer for this?