Getting started from the AWS CLI - Amazon EMR
Step 1: Create an applicationStep 2: Submit a job runStep 3: Review outputStep 4: Clean up

Getting started from the AWS CLI

Get started with EMR Serverless from the AWS CLI with commands to create an application, run jobs, check job run output, and delete your resources.

Step 1: Create an EMR Serverless application

Use the emr-serverless create-application command to create your first EMR Serverless application. You need to specify the application type and the the Amazon EMR release label associated with the application version you want to use. The name of the application is optional.

Spark

To create a Spark application, run the following command.

aws emr-serverless create-application \
    --release-label emr-6.6.0 \
    --type "SPARK" \
    --name my-application
Hive

To create a Hive application, run the following command. 

aws emr-serverless create-application \
    --release-label emr-6.6.0 \
    --type "HIVE" \
    --name my-application

Note the application ID returned in the output. You'll use the ID to start the application and during job submission, referred to after this as the application-id.

Before you move on to Step 2: Submit a job run to your EMR Serverless application, make sure that your application has reached the CREATED state with the get-application API.

aws emr-serverless get-application \
    --application-id application-id

EMR Serverless creates workers to accommodate your requested jobs. By default, these are created on demand, but you can also specify a pre-initialized capacity by setting the initialCapacity parameter when you create the application. You can also limit the total maximum capacity that an application can use with the maximumCapacity parameter. To learn more about these options, see Configuring an application when working with EMR Serverless.

Step 2: Submit a job run to your EMR Serverless application

Now your EMR Serverless application is ready to run jobs.

Spark

In this step, we use a PySpark script to compute the number of occurrences of unique words across multiple text files. A public, read-only S3 bucket stores both the script and the dataset. The application sends the output file and the log data from the Spark runtime to /output and /logs directories in the S3 bucket that you created.

To run a Spark job

  1. Use the following command to copy the sample script we will run into your new bucket.

    aws s3 cp s3://us-east-1.elasticmapreduce/emr-containers/samples/wordcount/scripts/wordcount.py s3://amzn-s3-demo-bucket/scripts/

  2. In the following command, substitute application-id with your application ID. Substitute job-role-arn with the runtime role ARN you created in Create a job runtime role. Substitute job-run-name with the name you want to call your job run. Replace all amzn-s3-demo-bucket strings with the Amazon S3 bucket that you created, and add /output to the path. This creates a new folder in your bucket where EMR Serverless can copy the output files of your application.

    aws emr-serverless start-job-run \
    --application-id application-id \
    --execution-role-arn job-role-arn \
    --name job-run-name \
    --job-driver '{
        "sparkSubmit": {
          "entryPoint": "s3://amzn-s3-demo-bucket/scripts/wordcount.py",
          "entryPointArguments": ["s3://amzn-s3-demo-bucket/emr-serverless-spark/output"],
          "sparkSubmitParameters": "--conf spark.executor.cores=1 --conf spark.executor.memory=4g --conf spark.driver.cores=1 --conf spark.driver.memory=4g --conf spark.executor.instances=1"
        }
    }'

  3. Note the job run ID returned in the output . Replace job-run-id with this ID in the following steps.

Hive

In this tutorial, we create a table, insert a few records, and run a count aggregation query. To run the Hive job, first create a file that contains all Hive queries to run as part of single job, upload the file to S3, and specify this S3 path when you start the Hive job.

To run a Hive job

  1. Create a file called hive-query.ql that contains all the queries that you want to run in your Hive job.

    create database if not exists emrserverless;
use emrserverless;
create table if not exists test_table(id int);
drop table if exists Values__Tmp__Table__1;
insert into test_table values (1),(2),(2),(3),(3),(3);
select id, count(id) from test_table group by id order by id desc;

  2. Upload hive-query.ql to your S3 bucket with the following command.

    aws s3 cp hive-query.ql s3://amzn-s3-demo-bucket/emr-serverless-hive/query/hive-query.ql

  3. In the following command, substitute application-id with your own application ID. Substitute job-role-arn with the runtime role ARN you created in Create a job runtime role. Replace all amzn-s3-demo-bucket strings with the Amazon S3 bucket that you created, and add /output and /logs to the path. This creates new folders in your bucket, where EMR Serverless can copy the output and log files of your application.

    aws emr-serverless start-job-run \
    --application-id application-id \
    --execution-role-arn job-role-arn \
    --job-driver '{
        "hive": {
          "query": "s3://amzn-s3-demo-bucket/emr-serverless-hive/query/hive-query.ql",
          "parameters": "--hiveconf hive.log.explain.output=false"
        }
    }' \
    --configuration-overrides '{
      "applicationConfiguration": [{
        "classification": "hive-site",
          "properties": {
            "hive.exec.scratchdir": "s3://amzn-s3-demo-bucket/emr-serverless-hive/hive/scratch",
            "hive.metastore.warehouse.dir": "s3://amzn-s3-demo-bucket/emr-serverless-hive/hive/warehouse",
            "hive.driver.cores": "2",
            "hive.driver.memory": "4g",
            "hive.tez.container.size": "4096",
            "hive.tez.cpu.vcores": "1"
            }
        }],
        "monitoringConfiguration": {
          "s3MonitoringConfiguration": {
            "logUri": "s3://amzn-s3-demo-bucket/emr-serverless-hive/logs"
           }
        }
    }'

  4. Note the job run ID returned in the output. Replace job-run-id with this ID in the following steps.

Step 3: Review your job run's output

The job run should typically take 3-5 minutes to complete.

Spark

You can check for the state of your Spark job with the following command.

aws emr-serverless get-job-run \
    --application-id application-id \
    --job-run-id job-run-id

With your log destination set to s3://amzn-s3-demo-bucket/emr-serverless-spark/logs, you can find the logs for this specific job run under s3://amzn-s3-demo-bucket/emr-serverless-spark/logs/applications/application-id/jobs/job-run-id.

For Spark applications, EMR Serverless pushes event logs every 30 seconds to the sparklogs folder in your S3 log destination. When your job completes, Spark runtime logs for the driver and executors upload to folders named appropriately by the worker type, such as driver or executor. The output of the PySpark job uploads to s3://amzn-s3-demo-bucket/output/.

Hive

You can check for the state of your Hive job with the following command.

aws emr-serverless get-job-run \
    --application-id application-id \
    --job-run-id job-run-id

With your log destination set to s3://amzn-s3-demo-bucket/emr-serverless-hive/logs, you can find the logs for this specific job run under s3://amzn-s3-demo-bucket/emr-serverless-hive/logs/applications/application-id/jobs/job-run-id.

For Hive applications, EMR Serverless continuously uploads the Hive driver to the HIVE_DRIVER folder, and Tez tasks logs to the TEZ_TASK folder, of your S3 log destination. After the job run reaches the SUCCEEDED state, the output of your Hive query becomes available in the Amazon S3 location that you specified in the monitoringConfiguration field of configurationOverrides.

Step 4: Clean up

When you’re done working with this tutorial, consider deleting the resources that you created. We recommend that you release resources that you don't intend to use again.

Delete your application

To delete an application, use the following command. 

aws emr-serverless delete-application \
    --application-id application-id

Delete your S3 log bucket

To delete your S3 logging and output bucket, use the following command. Replace amzn-s3-demo-bucket with the actual name of the S3 bucket created in Prepare storage for EMR Serverless..

aws s3 rm s3://amzn-s3-demo-bucket --recursive
aws s3api delete-bucket --bucket amzn-s3-demo-bucket

Delete your job runtime role

To delete the runtime role, detach the policy from the role. You can then delete both the role and the policy.

aws iam detach-role-policy \
    --role-name EMRServerlessS3RuntimeRole \
    --policy-arn policy-arn

To delete the role, use the following command.

aws iam delete-role \
    --role-name EMRServerlessS3RuntimeRole

To delete the policy that was attached to the role, use the following command.

aws iam delete-policy \
    --policy-arn policy-arn

For more examples of running Spark and Hive jobs, see Using Spark configurations when you run EMR Serverless jobs and Using Hive configurations when you run EMR Serverless jobs.