Common - Settings:

ENVVAR_SUFIX_SERVICE_PORT_GRPC    = 'SERVICE_PORT_GRPC'

ENVVAR_SUFIX_SERVICE_PORT_HTTP    = 'SERVICE_PORT_HTTP'

def find_missing_environment_variables(

    required_environment_variables : List[str] = []

) -> List[str]:

    if ENVVAR_KUBERNETES_PORT in os.environ:

        missing_variables = set(required_environment_variables).difference(set(os.environ.keys()))

    else:

        # We're not running in Kubernetes, nothing to wait for

        missing_variables = required_environment_variables

    return missing_variables

def wait_for_environment_variables(

    required_environment_variables : List[str] = [], wait_delay_seconds : float = DEFAULT_RESTART_DELAY

):

    if ENVVAR_KUBERNETES_PORT not in os.environ: return # We're not running in Kubernetes, nothing to wait for

    missing_variables = set(required_environment_variables).difference(set(os.environ.keys()))

    missing_variables = find_missing_environment_variables(required_environment_variables)

    if len(missing_variables) == 0: return # We have all environment variables defined

    msg = 'Variables({:s}) are missing in Environment({:s}), restarting in {:f} seconds...'

    LOGGER.error(msg.format(str(missing_variables), str(os.environ), wait_delay_seconds))

    time.sleep(wait_delay_seconds)

    raise Exception('Restarting...')

    raise Exception('Restarting...') # pylint: disable=broad-exception-raised

def get_setting(name, **kwargs):

    value = os.environ.get(name)

        value = kwargs['settings'].pop(name, value)

    if value is not None: return value

    if 'default' in kwargs: return kwargs['default']

    # pylint: disable=broad-exception-raised

    raise Exception('Setting({:s}) not specified in environment or configuration'.format(str(name)))

def get_env_var_name(service_name : ServiceNameEnum, env_var_group):