'Any initialization the volume driver does while starting.'

def do_setup(self, context):

    super(CohoDriver, self).do_setup(context)
    self._execute_as_root = True
    self._context = context
    config = self.configuration.coho_rpc_port
    if (not config):
        msg = _('Coho    rpc    port    is    not    configured')
        LOG.warning(msg)
        raise exception.CohoException(msg)
    if ((config < 1) or (config > 65535)):
        msg = (_('Invalid    port    number    %(config)s    for    Coho    rpc    port') % {'config': config})
        LOG.warning(msg)
        raise exception.CohoException(msg)
