# Create and using a job template to start a job run
<a name="create-job-template"></a>

This section describes creating a job template and using the template to start a job run with the AWS Command Line Interface (AWS CLI).

**To create a job template**

1. Create a `create-job-template-request.json` file and specify the required parameters for your job template, as shown in the following example JSON file. For information about all available parameters, see the [CreateJobTemplate](https://docs.aws.amazon.com/emr-on-eks/latest/APIReference/Welcome.html) API.

   Most values that are required for the `StartJobRun` API are also required for `jobTemplateData`. If you want to use placeholders for any parameters and provide values when invoking StartJobRun using a job template, please see the next section on job template parameters.

   ```
   {
      "name": "{{mytemplate}}",
      "jobTemplateData": {
           "executionRoleArn": "{{iam_role_arn_for_job_execution}}", 
           "releaseLabel": "emr-6.7.0-latest",
           "jobDriver": {
               "sparkSubmitJobDriver": { 
                   "entryPoint": "{{entryPoint_location}}",
                   "entryPointArguments": [ "{{argument1}}","{{argument2}}",...],
                   "sparkSubmitParameters": "--class <{{main_class}}> --conf spark.executor.instances=2 --conf spark.executor.memory=2G --conf spark.executor.cores=2 --conf spark.driver.cores=1"
               }
           },
           "configurationOverrides": {
               "applicationConfiguration": [
                   {
                       "classification": "spark-defaults", 
                       "properties": {
                            "spark.driver.memory":"2G"
                       }
                   }
               ], 
               "monitoringConfiguration": {
                   "persistentAppUI": "ENABLED", 
                   "cloudWatchMonitoringConfiguration": {
                       "logGroupName": "{{my_log_group}}", 
                       "logStreamNamePrefix": "{{log_stream_prefix}}"
                   }, 
                   "s3MonitoringConfiguration": {
                       "logUri": "s3://{{my_s3_log_location}}/"
                   }
               }
           }
        }
   }
   ```

1. Use the `create-job-template` command with a path to the `create-job-template-request.json` file stored locally.

   ```
   aws emr-containers create-job-template \ 
   --cli-input-json file:{{//./create-job-template-request.json}}
   ```

**To start a job run using a job template**

Supply the virtual cluster id, job template id, and job name in the `StartJobRun` command, as shown in the following example.

```
aws emr-containers start-job-run \
--virtual-cluster-id {{123456}} \
--name {{myjob}} \
--job-template-id {{1234abcd}}
```