Collect file descriptors in ECS tasks to send to Cloudwatch

Question

I'm currently running into a problem with our application where the we have too many files opened and it's causing a errors. I've increased the ulimit for NOFILE in the task definition and I'm making code changes but I need to be able to monitor the open files for individual containers to make sure the code changes are working.

Is there way to simply configure the cloudwatch-agent or the like to send the metrics to cloudwatch?

The only other idea I got is to create a bash script that logs into individual containers to collect the data and send up to cloudwatch.