Is there a way to send a message bak to a lambda that invokes a Fargate task

Question

Hello and thanks for taking time to look at my question.

I see that its possible to pass a token from a lambda step function to a Fargate task and the token can be accessed in the running Docker container, when using .waitForTaskToken to a Task state’s resource and that token can be passed bak to the step function when the task has run..

I have a lambda function that invokes a Fargate task. But I am finding hard to know when the node script I am running in the Docker container has completed or succeeded /failed. I'd like to be able to send a success or error 'message' back to the lambda when the script has run. Is this possible using a similar approach to the tokens used in step functions?

Does anyone know how I might do that or where I can find out.

Thanks for any comments

Answer 1

There are multiple options that I can think of:

• You can use the AWS SDK of your choice (or AWS CLI) to poke back the Lambda directly (whether that's the same lambda or another one it's up to you).
• Similarly you can use SNS Fanout and send the status to an SNS topic (to which you subscribe the Lambda function that you want to start)
• You can send the status to CloudWatch Events (AmazonEvent Bridge) which could trigger your Lambda Function
• You can send your container logs to Cloudwatch Logs and subscribe your Lambda to the respective Log Group.

And an example with SF, SNS and Fargate.