Source code for

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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 import ClusterStates, NodegroupStates
from import (
from import EksClusterStateSensor, EksNodegroupStateSensor
from airflow.utils.trigger_rule import TriggerRule
from import ENV_ID_KEY, SystemTestContextBuilder
from import get_describe_pod_operator

[docs]DAG_ID = "example_eks_with_nodegroups"
# Externally fetched variables:
[docs]sys_test_context_task = ( SystemTestContextBuilder().add_variable(ROLE_ARN_KEY).add_variable(SUBNETS_KEY, split_string=True).build() )
[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"}, }, )
[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.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/
[docs]test_run = get_test_run(dag)

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