Source code for tests.system.providers.amazon.aws.example_emr

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from __future__ import annotations

import json
from datetime import datetime

import boto3

from airflow import DAG
from airflow.decorators import task
from airflow.models.baseoperator import chain
from airflow.providers.amazon.aws.hooks.ssm import SsmHook
from airflow.providers.amazon.aws.operators.emr import (
    EmrAddStepsOperator,
    EmrCreateJobFlowOperator,
    EmrModifyClusterOperator,
    EmrTerminateJobFlowOperator,
)
from airflow.providers.amazon.aws.sensors.emr import EmrJobFlowSensor
from airflow.utils.trigger_rule import TriggerRule
from tests.system.providers.amazon.aws.utils import ENV_ID_KEY, SystemTestContextBuilder

[docs]DAG_ID = "example_emr"
[docs]CONFIG_NAME = "EMR Runtime Role Security Configuration"
[docs]EXECUTION_ROLE_ARN_KEY = "EXECUTION_ROLE_ARN"
[docs]SECURITY_CONFIGURATION = { "AuthorizationConfiguration": { "IAMConfiguration": { "EnableApplicationScopedIAMRole": True, }, }, # Use IMDSv2 for greater security, see the following doc for more details: # https://docs.aws.amazon.com/emr/latest/ManagementGuide/emr-create-security-configuration.html "InstanceMetadataServiceConfiguration": { "MinimumInstanceMetadataServiceVersion": 2, "HttpPutResponseHopLimit": 2,
}, } # [START howto_operator_emr_steps_config]
[docs]SPARK_STEPS = [ { "Name": "calculate_pi", "ActionOnFailure": "CONTINUE", "HadoopJarStep": { "Jar": "command-runner.jar", "Args": ["/usr/lib/spark/bin/run-example", "SparkPi", "10"],
}, } ]
[docs]JOB_FLOW_OVERRIDES = { "Name": "PiCalc", "ReleaseLabel": "emr-6.7.0", "Applications": [{"Name": "Spark"}], "Instances": { "InstanceGroups": [ { "Name": "Primary node", "Market": "ON_DEMAND", "InstanceRole": "MASTER", "InstanceType": "m5.xlarge", "InstanceCount": 1, }, ], "KeepJobFlowAliveWhenNoSteps": False, "TerminationProtected": False, }, "Steps": SPARK_STEPS, "JobFlowRole": "EMR_EC2_DefaultRole", "ServiceRole": "EMR_DefaultRole",
} # [END howto_operator_emr_steps_config] @task
[docs]def get_ami_id(): """ Returns an AL2 AMI compatible with EMR """ return SsmHook(aws_conn_id=None).get_parameter_value( "/aws/service/ami-amazon-linux-latest/amzn2-ami-hvm-x86_64-ebs"
) @task
[docs]def configure_security_config(config_name: str): boto3.client("emr").create_security_configuration( Name=config_name, SecurityConfiguration=json.dumps(SECURITY_CONFIGURATION),
) @task(trigger_rule=TriggerRule.ALL_DONE)
[docs]def delete_security_config(config_name: str): boto3.client("emr").delete_security_configuration( Name=config_name,
)
[docs]sys_test_context_task = SystemTestContextBuilder().add_variable(EXECUTION_ROLE_ARN_KEY).build()
with DAG( dag_id=DAG_ID, start_date=datetime(2021, 1, 1), schedule="@once", catchup=False, tags=["example"], ) as dag:
[docs] test_context = sys_test_context_task()
env_id = test_context[ENV_ID_KEY] config_name = f"{CONFIG_NAME}-{env_id}" execution_role_arn = test_context[EXECUTION_ROLE_ARN_KEY] JOB_FLOW_OVERRIDES["SecurityConfiguration"] = config_name JOB_FLOW_OVERRIDES["Instances"]["InstanceGroups"][0]["CustomAmiId"] = get_ami_id() create_security_configuration = configure_security_config(config_name) # [START howto_operator_emr_create_job_flow] create_job_flow = EmrCreateJobFlowOperator( task_id="create_job_flow", job_flow_overrides=JOB_FLOW_OVERRIDES, ) # [END howto_operator_emr_create_job_flow] # [START howto_operator_emr_modify_cluster] modify_cluster = EmrModifyClusterOperator( task_id="modify_cluster", cluster_id=create_job_flow.output, step_concurrency_level=1 ) # [END howto_operator_emr_modify_cluster] # [START howto_operator_emr_add_steps] add_steps = EmrAddStepsOperator( task_id="add_steps", job_flow_id=create_job_flow.output, steps=SPARK_STEPS, wait_for_completion=True, execution_role_arn=execution_role_arn, ) # [END howto_operator_emr_add_steps] # [START howto_operator_emr_terminate_job_flow] remove_cluster = EmrTerminateJobFlowOperator( task_id="remove_cluster", job_flow_id=create_job_flow.output, ) # [END howto_operator_emr_terminate_job_flow] remove_cluster.trigger_rule = TriggerRule.ALL_DONE # [START howto_sensor_emr_job_flow] check_job_flow = EmrJobFlowSensor(task_id="check_job_flow", job_flow_id=create_job_flow.output) # [END howto_sensor_emr_job_flow] check_job_flow.poke_interval = 10 delete_security_configuration = delete_security_config(config_name) chain( # TEST SETUP test_context, create_security_configuration, # TEST BODY create_job_flow, modify_cluster, add_steps, # TEST TEARDOWN remove_cluster, check_job_flow, delete_security_configuration, ) 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)

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