| # -*- coding: utf-8 -*- |
| # |
| # Licensed to the Apache Software Foundation (ASF) under one |
| # or more contributor license agreements. See the NOTICE file |
| # distributed with this work for additional information |
| # regarding copyright ownership. The ASF licenses this file |
| # to you under the Apache License, Version 2.0 (the |
| # "License"); you may not use this file except in compliance |
| # with the License. You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, |
| # software distributed under the License is distributed on an |
| # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| # KIND, either express or implied. See the License for the |
| # specific language governing permissions and limitations |
| # under the License. |
| |
| from airflow.configuration import conf |
| from airflow.exceptions import AirflowException |
| |
| # Constants for resources (megabytes are the base unit) |
| MB = 1 |
| GB = 1024 * MB |
| TB = 1024 * GB |
| PB = 1024 * TB |
| EB = 1024 * PB |
| |
| |
| class Resource(object): |
| """ |
| Represents a resource requirement in an execution environment for an operator. |
| |
| :param name: Name of the resource |
| :type name: str |
| :param units_str: The string representing the units of a resource (e.g. MB for a CPU |
| resource) to be used for display purposes |
| :type units_str: str |
| :param qty: The number of units of the specified resource that are required for |
| execution of the operator. |
| :type qty: long |
| """ |
| def __init__(self, name, units_str, qty): |
| if qty < 0: |
| raise AirflowException( |
| 'Received resource quantity {} for resource {} but resource quantity ' |
| 'must be non-negative.'.format(qty, name)) |
| |
| self._name = name |
| self._units_str = units_str |
| self._qty = qty |
| |
| def __eq__(self, other): |
| return self.__dict__ == other.__dict__ |
| |
| def __repr__(self): |
| return str(self.__dict__) |
| |
| @property |
| def name(self): |
| return self._name |
| |
| @property |
| def units_str(self): |
| return self._units_str |
| |
| @property |
| def qty(self): |
| return self._qty |
| |
| |
| class CpuResource(Resource): |
| def __init__(self, qty): |
| super(CpuResource, self).__init__('CPU', 'core(s)', qty) |
| |
| |
| class RamResource(Resource): |
| def __init__(self, qty): |
| super(RamResource, self).__init__('RAM', 'MB', qty) |
| |
| |
| class DiskResource(Resource): |
| def __init__(self, qty): |
| super(DiskResource, self).__init__('Disk', 'MB', qty) |
| |
| |
| class GpuResource(Resource): |
| def __init__(self, qty): |
| super(GpuResource, self).__init__('GPU', 'gpu(s)', qty) |
| |
| |
| class Resources(object): |
| """ |
| The resources required by an operator. Resources that are not specified will use the |
| default values from the airflow config. |
| |
| :param cpus: The number of cpu cores that are required |
| :type cpus: long |
| :param ram: The amount of RAM required |
| :type ram: long |
| :param disk: The amount of disk space required |
| :type disk: long |
| :param gpus: The number of gpu units that are required |
| :type gpus: long |
| """ |
| def __init__(self, |
| cpus=conf.getint('operators', 'default_cpus'), |
| ram=conf.getint('operators', 'default_ram'), |
| disk=conf.getint('operators', 'default_disk'), |
| gpus=conf.getint('operators', 'default_gpus') |
| ): |
| self.cpus = CpuResource(cpus) |
| self.ram = RamResource(ram) |
| self.disk = DiskResource(disk) |
| self.gpus = GpuResource(gpus) |
| |
| def __eq__(self, other): |
| return self.__dict__ == other.__dict__ |
| |
| def __repr__(self): |
| return str(self.__dict__) |