ecs-launcher

ECS-launcher is a very simple Lambda function which launches tasks on your ECS cluster. We're using it at Fleetlog to start one-off scheduled tasks from CloudWatch events.

Usage

You should upload the deployment package which can be downloaded from Releases page to Lambda and create an IAM role, which allows access to ECS' RunTask call to this function. A basic role, which allows the required actions, may look like this:

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Allow",
            "Action": [
                "logs:CreateLogGroup",
                "logs:CreateLogStream",
                "logs:PutLogEvents",
                "ecs:RunTask"
            ],
            "Resource": "*"
        }
    ]
}

Then you just need to invoke the function with correctly populated event object. It's a JSON object with 2 fields: aws_config and task_config. Both take the same options as their respective AWS Node SDK functions (AWS config, Task config).

For example, the event data could look like this:

{
    "aws_config": {
        "region": "ap-southeast-2"
    },
    "task_config": {
		"cluster": "default",
		"taskDefinition": "long-running-import-task:24",
		"overrides": {
			"containerOverrides": [
				{
					"name": "importer",
					"command": ["node", "import.js", "clean"]
				}
			]
		}
    }
}