| # |
| # 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 __future__ import annotations |
| |
| 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: |
| """ |
| Represents a resource requirement in an execution environment for an operator. |
| |
| :param name: Name of the resource |
| :param units_str: The string representing the units of a resource (e.g. MB for a CPU |
| resource) to be used for display purposes |
| :param qty: The number of units of the specified resource that are required for |
| execution of the operator. |
| """ |
| |
| def __init__(self, name, units_str, qty): |
| if qty < 0: |
| raise AirflowException( |
| f"Received resource quantity {qty} for resource {name}, " |
| f"but resource quantity must be non-negative." |
| ) |
| |
| self._name = name |
| self._units_str = units_str |
| self._qty = qty |
| |
| def __eq__(self, other): |
| if not isinstance(other, self.__class__): |
| return NotImplemented |
| return self.__dict__ == other.__dict__ |
| |
| def __repr__(self): |
| return str(self.__dict__) |
| |
| @property |
| def name(self): |
| """Name of the resource.""" |
| return self._name |
| |
| @property |
| def units_str(self): |
| """The string representing the units of a resource.""" |
| return self._units_str |
| |
| @property |
| def qty(self): |
| """ |
| The number of units of the specified resource that are required for |
| execution of the operator. |
| """ |
| return self._qty |
| |
| def to_dict(self): |
| return { |
| "name": self.name, |
| "qty": self.qty, |
| "units_str": self.units_str, |
| } |
| |
| |
| class CpuResource(Resource): |
| """Represents a CPU requirement in an execution environment for an operator.""" |
| |
| def __init__(self, qty): |
| super().__init__("CPU", "core(s)", qty) |
| |
| |
| class RamResource(Resource): |
| """Represents a RAM requirement in an execution environment for an operator.""" |
| |
| def __init__(self, qty): |
| super().__init__("RAM", "MB", qty) |
| |
| |
| class DiskResource(Resource): |
| """Represents a disk requirement in an execution environment for an operator.""" |
| |
| def __init__(self, qty): |
| super().__init__("Disk", "MB", qty) |
| |
| |
| class GpuResource(Resource): |
| """Represents a GPU requirement in an execution environment for an operator.""" |
| |
| def __init__(self, qty): |
| super().__init__("GPU", "gpu(s)", qty) |
| |
| |
| class Resources: |
| """ |
| 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 |
| :param ram: The amount of RAM required |
| :param disk: The amount of disk space required |
| :param gpus: The number of gpu units that are required |
| """ |
| |
| 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): |
| if not isinstance(other, self.__class__): |
| return NotImplemented |
| return self.__dict__ == other.__dict__ |
| |
| def __repr__(self): |
| return str(self.__dict__) |
| |
| def to_dict(self): |
| return { |
| "cpus": self.cpus.to_dict(), |
| "ram": self.ram.to_dict(), |
| "disk": self.disk.to_dict(), |
| "gpus": self.gpus.to_dict(), |
| } |
| |
| @classmethod |
| def from_dict(cls, resources_dict: dict): |
| """Create resources from resources dict.""" |
| cpus = resources_dict["cpus"]["qty"] |
| ram = resources_dict["ram"]["qty"] |
| disk = resources_dict["disk"]["qty"] |
| gpus = resources_dict["gpus"]["qty"] |
| |
| return cls(cpus=cpus, ram=ram, disk=disk, gpus=gpus) |