nova.py 文件源码

def check_active(self, server):
        """Check server status.

        Accepts both server IDs and server objects.
        Returns True if server is ACTIVE,
        raises errors when server has an ERROR or unknown to Zun status,
        returns False otherwise.

        """
        # not checking with is_uuid_like as most tests use strings e.g. '1234'
        if isinstance(server, six.string_types):
            server = self.fetch_server(server)
            if server is None:
                return False
            else:
                status = self.get_status(server)
        else:
            status = self.get_status(server)
            if status != 'ACTIVE':
                self.refresh_server(server)
                status = self.get_status(server)

        if status in self.deferred_server_statuses:
            return False
        elif status == 'ACTIVE':
            return True
        elif status == 'ERROR':
            fault = getattr(server, 'fault', {})
            raise exception.ServerInError(
                resource_status=status,
                status_reason=_("Message: %(message)s, Code: %(code)s") % {
                    'message': fault.get('message', _('Unknown')),
                    'code': fault.get('code', _('Unknown'))
                })
        else:
            raise exception.ServerUnknownStatus(
                resource_status=server.status,
                status_reason=_('Unknown'),
                result=_('Server is not active'))