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113 | # -*- 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.
"""
This is an example dag for using a Kubernetes Executor Configuration.
"""
from __future__ import print_function
import os
from airflow.contrib.example_dags.libs.helper import print_stuff
from airflow.models import DAG
from airflow.operators.python_operator import PythonOperator
from airflow.utils.dates import days_ago
default_args = {
'owner': 'Airflow',
'start_date': days_ago(2)
}
with DAG(
dag_id='example_kubernetes_executor_config',
default_args=default_args,
schedule_interval=None
) as dag:
def test_volume_mount():
"""
Tests whether the volume has been mounted.
"""
with open('/foo/volume_mount_test.txt', 'w') as foo:
foo.write('Hello')
return_code = os.system("cat /foo/volume_mount_test.txt")
assert return_code == 0
# You can use annotations on your kubernetes pods!
start_task = PythonOperator(
task_id="start_task",
python_callable=print_stuff,
executor_config={
"KubernetesExecutor": {
"annotations": {"test": "annotation"}
}
}
)
# You can mount volume or secret to the worker pod
second_task = PythonOperator(
task_id="four_task",
python_callable=test_volume_mount,
executor_config={
"KubernetesExecutor": {
"volumes": [
{
"name": "example-kubernetes-test-volume",
"hostPath": {"path": "/tmp/"},
},
],
"volume_mounts": [
{
"mountPath": "/foo/",
"name": "example-kubernetes-test-volume",
},
]
}
}
)
# Test that we can add labels to pods
third_task = PythonOperator(
task_id="non_root_task",
python_callable=print_stuff,
executor_config={
"KubernetesExecutor": {
"labels": {
"release": "stable"
}
}
}
)
other_ns_task = PythonOperator(
task_id="other_namespace_task",
python_callable=print_stuff,
executor_config={
"KubernetesExecutor": {
"namespace": "test-namespace",
"labels": {
"release": "stable"
}
}
}
)
start_task >> second_task >> third_task
start_task >> other_ns_task
|