Airflow和Luigi是两个常用的任务调度工具,可以用于自动化AWS EMR集群的创建和pyspark任务的部署。
下面是一个使用Airflow和Boto3库来自动创建AWS EMR集群的示例代码:
import boto3
from airflow import DAG
from airflow.operators.python_operator import PythonOperator
from datetime import datetime
# AWS配置信息
AWS_ACCESS_KEY = ''
AWS_SECRET_KEY = ''
AWS_REGION = ''
EMR_CLUSTER_NAME = ''
EMR_RELEASE_LABEL = ''
EMR_MASTER_INSTANCE_TYPE = ''
EMR_SLAVE_INSTANCE_TYPE = ''
EMR_NUM_CORE_NODES =
# 创建EMR集群
def create_emr_cluster():
emr_client = boto3.client('emr', region_name=AWS_REGION,
aws_access_key_id=AWS_ACCESS_KEY,
aws_secret_access_key=AWS_SECRET_KEY)
response = emr_client.run_job_flow(
Name=EMR_CLUSTER_NAME,
ReleaseLabel=EMR_RELEASE_LABEL,
Instances={
'InstanceGroups': [
{
'Name': 'Master',
'Market': 'ON_DEMAND',
'InstanceRole': 'MASTER',
'InstanceType': EMR_MASTER_INSTANCE_TYPE,
'InstanceCount': 1,
},
{
'Name': 'Core',
'Market': 'ON_DEMAND',
'InstanceRole': 'CORE',
'InstanceType': EMR_SLAVE_INSTANCE_TYPE,
'InstanceCount': EMR_NUM_CORE_NODES,
}
],
'KeepJobFlowAliveWhenNoSteps': True,
'TerminationProtected': False,
},
Applications=[
{'Name': 'Spark'},
],
VisibleToAllUsers=True,
JobFlowRole='EMR_EC2_DefaultRole',
ServiceRole='EMR_DefaultRole',
Tags=[
{
'Key': 'Name',
'Value': EMR_CLUSTER_NAME,
},
],
)
cluster_id = response['JobFlowId']
print(f'EMR Cluster created: {cluster_id}')
# 创建DAG
default_args = {
'owner': 'airflow',
'start_date': datetime(2022, 1, 1),
}
dag = DAG('emr_cluster_creation', default_args=default_args, schedule_interval='@once')
create_cluster_task = PythonOperator(
task_id='create_emr_cluster',
python_callable=create_emr_cluster,
dag=dag
)
create_cluster_task
上述代码使用Boto3库与AWS EMR API进行通信,创建一个EMR集群。你可以根据实际情况修改AWS配置信息、EMR集群参数等。
接下来是一个使用Luigi来部署pyspark任务到AWS EMR集群的示例代码:
import luigi
from luigi.contrib.emr import PySparkStep
from datetime import date
# AWS配置信息
AWS_ACCESS_KEY = ''
AWS_SECRET_KEY = ''
AWS_REGION = ''
EMR_CLUSTER_ID = ''
# pyspark任务
class MyPySparkTask(luigi.contrib.emr.EMRJobRunnerTask):
def requires(self):
return []
def output(self):
return luigi.LocalTarget('/path/to/output')
def emr_job_runner_steps(self):
return [
PySparkStep(
name='My PySpark Job',
script='s3:///path/to/your_script.py',
py_files=['s3:///path/to/dependencies.py'],
action_on_failure='CONTINUE',
step_args=['arg1', 'arg2'],
main_class=None,
spark_submit=None,
spark_submit_args=None,
hadoop_streaming_jar=None,
hadoop_streaming_main_class=None,
spark_jars=None,
spark_jars_ivy=None,
spark_packages=None,
spark_packages_ivy=None,
spark_submit_env=None,
spark_submit_classpath=None,
spark_submit_py_files=None,
spark_submit_files=None,
spark_submit_conf=None,
spark_submit_deploy_mode=None,
spark_submit_driver_memory=None,
spark_submit_driver_java_options=None,
spark_submit_executor_memory=None,
spark_submit_proxy_user=None,
spark_submit_verbose=None,
spark_submit_spark_conf=None,
spark_submit_spark_properties=None,
spark_submit_spark_files=None,
spark_submit_spark_j