This snippet is a sample showing how to implement CloudWatch Logs streaming to ElasticSearch using terraform.
I wrote this gist because I didn't found a clear, end-to-end example on how to achieve this task. In particular,
I understood the resource "aws_lambda_permission" "cloudwatch_allow" part by reading a couple of bug reports plus
this stackoverflow post.
The js file is actually the Lambda function automatically created by AWS when creating this pipeline through the
web console. I only added a endpoint variable handling so it is configurable from terraform.