# 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 datetime import datetime
import boto3
from airflow.decorators import task
from airflow.models.baseoperator import chain
from airflow.models.dag import DAG
from airflow.providers.amazon.aws.hooks.eks import ClusterStates, NodegroupStates
from airflow.providers.amazon.aws.operators.eks import (
EksCreateClusterOperator,
EksCreateNodegroupOperator,
EksDeleteClusterOperator,
EksDeleteNodegroupOperator,
EksPodOperator,
)
from airflow.providers.amazon.aws.sensors.eks import EksClusterStateSensor, EksNodegroupStateSensor
from airflow.utils.trigger_rule import TriggerRule
from providers.tests.system.amazon.aws.utils import ENV_ID_KEY, SystemTestContextBuilder
from providers.tests.system.amazon.aws.utils.k8s import get_describe_pod_operator
[docs]DAG_ID = "example_eks_with_nodegroups"
# Externally fetched variables:
[docs]ROLE_ARN_KEY = "ROLE_ARN"
[docs]sys_test_context_task = (
SystemTestContextBuilder().add_variable(ROLE_ARN_KEY).add_variable(SUBNETS_KEY, split_string=True).build()
)
@task
[docs]def create_launch_template(template_name: str):
# This launch template enables IMDSv2.
boto3.client("ec2").create_launch_template(
LaunchTemplateName=template_name,
LaunchTemplateData={
"MetadataOptions": {"HttpEndpoint": "enabled", "HttpTokens": "required"},
},
)
@task(trigger_rule=TriggerRule.ALL_DONE)
[docs]def delete_launch_template(template_name: str):
boto3.client("ec2").delete_launch_template(LaunchTemplateName=template_name)
with DAG(
dag_id=DAG_ID,
schedule="@once",
start_date=datetime(2021, 1, 1),
tags=["example"],
catchup=False,
) as dag:
[docs] test_context = sys_test_context_task()
env_id = test_context[ENV_ID_KEY]
cluster_name = f"{env_id}-cluster"
nodegroup_name = f"{env_id}-nodegroup"
launch_template_name = f"{env_id}-launch-template"
# [START howto_operator_eks_create_cluster]
# Create an Amazon EKS Cluster control plane without attaching compute service.
create_cluster = EksCreateClusterOperator(
task_id="create_cluster",
cluster_name=cluster_name,
cluster_role_arn=test_context[ROLE_ARN_KEY],
resources_vpc_config={"subnetIds": test_context[SUBNETS_KEY]},
compute=None,
)
# [END howto_operator_eks_create_cluster]
# [START howto_sensor_eks_cluster]
await_create_cluster = EksClusterStateSensor(
task_id="await_create_cluster",
cluster_name=cluster_name,
target_state=ClusterStates.ACTIVE,
)
# [END howto_sensor_eks_cluster]
# [START howto_operator_eks_create_nodegroup]
create_nodegroup = EksCreateNodegroupOperator(
task_id="create_nodegroup",
cluster_name=cluster_name,
nodegroup_name=nodegroup_name,
nodegroup_subnets=test_context[SUBNETS_KEY],
nodegroup_role_arn=test_context[ROLE_ARN_KEY],
)
# [END howto_operator_eks_create_nodegroup]
# The launch template enforces IMDSv2 and is required for internal compliance
# when running these system tests on AWS infrastructure. It is not required
# for the operator to work, so I'm placing it outside the demo snippet.
create_nodegroup.create_nodegroup_kwargs = {"launchTemplate": {"name": launch_template_name}}
# [START howto_sensor_eks_nodegroup]
await_create_nodegroup = EksNodegroupStateSensor(
task_id="await_create_nodegroup",
cluster_name=cluster_name,
nodegroup_name=nodegroup_name,
target_state=NodegroupStates.ACTIVE,
)
# [END howto_sensor_eks_nodegroup]
await_create_nodegroup.poke_interval = 10
# [START howto_operator_eks_pod_operator]
start_pod = EksPodOperator(
task_id="start_pod",
pod_name="test_pod",
cluster_name=cluster_name,
image="amazon/aws-cli:latest",
cmds=["sh", "-c", "echo Test Airflow; date"],
labels={"demo": "hello_world"},
get_logs=True,
on_finish_action="keep_pod",
)
# [END howto_operator_eks_pod_operator]
# Keep the pod alive, so we can describe it in case of trouble. It's deleted with the cluster anyway.
start_pod.is_delete_operator_pod = False
# In this specific situation we want to keep the pod to be able to describe it,
# it is cleaned anyway with the cluster later on.
start_pod.is_delete_operator_pod = False
describe_pod = get_describe_pod_operator(
cluster_name, pod_name="{{ ti.xcom_pull(key='pod_name', task_ids='run_pod') }}"
)
# only describe the pod if the task above failed, to help diagnose
describe_pod.trigger_rule = TriggerRule.ONE_FAILED
# [START howto_operator_eks_delete_nodegroup]
delete_nodegroup = EksDeleteNodegroupOperator(
task_id="delete_nodegroup",
cluster_name=cluster_name,
nodegroup_name=nodegroup_name,
)
# [END howto_operator_eks_delete_nodegroup]
delete_nodegroup.trigger_rule = TriggerRule.ALL_DONE
await_delete_nodegroup = EksNodegroupStateSensor(
task_id="await_delete_nodegroup",
trigger_rule=TriggerRule.ALL_DONE,
cluster_name=cluster_name,
nodegroup_name=nodegroup_name,
target_state=NodegroupStates.NONEXISTENT,
)
# [START howto_operator_eks_delete_cluster]
delete_cluster = EksDeleteClusterOperator(
task_id="delete_cluster",
cluster_name=cluster_name,
)
# [END howto_operator_eks_delete_cluster]
delete_cluster.trigger_rule = TriggerRule.ALL_DONE
await_delete_cluster = EksClusterStateSensor(
task_id="await_delete_cluster",
trigger_rule=TriggerRule.ALL_DONE,
cluster_name=cluster_name,
target_state=ClusterStates.NONEXISTENT,
poke_interval=10,
)
chain(
# TEST SETUP
test_context,
create_launch_template(launch_template_name),
# TEST BODY
create_cluster,
await_create_cluster,
create_nodegroup,
await_create_nodegroup,
start_pod,
# TEST TEARDOWN
describe_pod,
delete_nodegroup, # part of the test AND teardown
await_delete_nodegroup,
delete_cluster, # part of the test AND teardown
await_delete_cluster,
delete_launch_template(launch_template_name),
)
from tests_common.test_utils.watcher import watcher
# This test needs watcher in order to properly mark success/failure
# when "tearDown" task with trigger rule is part of the DAG
list(dag.tasks) >> watcher()
from tests_common.test_utils.system_tests import get_test_run # noqa: E402
# Needed to run the example DAG with pytest (see: tests/system/README.md#run_via_pytest)
[docs]test_run = get_test_run(dag)