api gateway integration with aws batch

I am assuming that you want to use API Gateway + Lambda to create an endpoint for submitting job requests to AWS Batch.

In order to do so create the following Lambda function, which submits a job to AWS Batch. Replace "jobQueueArn" with the arn of your job queue. Integrate the Lambda function with API Gateway.

import boto3

def lambda_handler(event, context):

    client = boto3.client('batch')

    JOB_NAME = event['JobName']
    JOB_QUEUE = "jobQueueArn"
    JOB_DEFINITION = "a-job-definition:1"

    response = client.submit_job(
        jobName = JOB_NAME,
        jobQueue = JOB_QUEUE,
        jobDefinition = JOB_DEFINITION,
        parameters = { 'key': 'value' }
        )
    print(response)
    return 0

Parameters can be passed using the parameters input.

parameters (dict) -- Additional parameters passed to the job that replace parameter substitution placeholders that are set in the job definition. Parameters are specified as a key and value pair mapping. Parameters in a SubmitJob request override any corresponding parameter defaults from the job definition.

Make sure to attach the proper IAM policy to the Lambda Function's role.

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "",
            "Effect": "Allow",
            "Action": [
                "batch:SubmitJob"
            ],
            "Resource": [
                "*"
            ]
        }
    ]
}