| # 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. |
| """Classes for interacting with Kubernetes API.""" |
| from abc import ABC, abstractmethod |
| from functools import reduce |
| from typing import List, Optional |
| |
| from kubernetes.client import models as k8s |
| |
| |
| class K8SModel(ABC): |
| """ |
| These Airflow Kubernetes models are here for backwards compatibility |
| reasons only. Ideally clients should use the kubernetes api |
| and the process of |
| |
| client input -> Airflow k8s models -> k8s models |
| |
| can be avoided. All of these models implement the |
| `attach_to_pod` method so that they integrate with the kubernetes client. |
| """ |
| |
| @abstractmethod |
| def attach_to_pod(self, pod: k8s.V1Pod) -> k8s.V1Pod: |
| """ |
| :param pod: A pod to attach this Kubernetes object to |
| :type pod: kubernetes.client.models.V1Pod |
| :return: The pod with the object attached |
| """ |
| |
| |
| def append_to_pod(pod: k8s.V1Pod, k8s_objects: Optional[List[K8SModel]]): |
| """ |
| :param pod: A pod to attach a list of Kubernetes objects to |
| :type pod: kubernetes.client.models.V1Pod |
| :param k8s_objects: a potential None list of K8SModels |
| :type k8s_objects: Optional[List[K8SModel]] |
| :return: pod with the objects attached if they exist |
| """ |
| if not k8s_objects: |
| return pod |
| return reduce(lambda p, o: o.attach_to_pod(p), k8s_objects, pod) |