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#
# http://www.apache.org/licenses/LICENSE-2.0
#
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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,
EksDeleteClusterOperator,
EksPodOperator,
)
from airflow.providers.amazon.aws.sensors.eks import EksClusterStateSensor, EksNodegroupStateSensor
from airflow.utils.trigger_rule import TriggerRule
from tests.system.providers.amazon.aws.utils import ENV_ID_KEY, SystemTestContextBuilder
from tests.system.providers.amazon.aws.utils.k8s import get_describe_pod_operator
[docs]DAG_ID = "example_eks_with_nodegroup_in_one_step"
# 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_with_nodegroup]
# Create an Amazon EKS cluster control plane and an EKS nodegroup compute platform in one step.
create_cluster_and_nodegroup = EksCreateClusterOperator(
task_id="create_cluster_and_nodegroup",
cluster_name=cluster_name,
nodegroup_name=nodegroup_name,
cluster_role_arn=test_context[ROLE_ARN_KEY],
# Opting to use the same ARN for the cluster and the nodegroup here,
# but a different ARN could be configured and passed if desired.
nodegroup_role_arn=test_context[ROLE_ARN_KEY],
resources_vpc_config={"subnetIds": test_context[SUBNETS_KEY]},
# ``compute='nodegroup'`` is the default, explicitly set here for demo purposes.
compute="nodegroup",
# The launch template enforces IMDSv2 and is required for internal
# compliance when running these system tests on AWS infrastructure.
create_nodegroup_kwargs={"launchTemplate": {"name": launch_template_name}},
)
# [END howto_operator_eks_create_cluster_with_nodegroup]
await_create_nodegroup = EksNodegroupStateSensor(
task_id="await_create_nodegroup",
cluster_name=cluster_name,
nodegroup_name=nodegroup_name,
target_state=NodegroupStates.ACTIVE,
poke_interval=10,
)
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,
# Keep the pod alive, so we can describe it in case of trouble. It's deleted with the cluster anyway.
on_finish_action="keep_pod",
)
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_force_delete_cluster]
# An Amazon EKS cluster can not be deleted with attached resources such as nodegroups or Fargate profiles.
# Setting the `force` to `True` will delete any attached resources before deleting the cluster.
delete_nodegroup_and_cluster = EksDeleteClusterOperator(
task_id="delete_nodegroup_and_cluster",
cluster_name=cluster_name,
force_delete_compute=True,
)
# [END howto_operator_eks_force_delete_cluster]
delete_nodegroup_and_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_and_nodegroup,
await_create_nodegroup,
start_pod,
# TEST TEARDOWN
describe_pod,
delete_nodegroup_and_cluster,
await_delete_cluster,
delete_launch_template(launch_template_name),
)
from tests.system.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.system.utils 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)