Lambda function concurrent invocation per event trigger

Question

I have a lambda function that is is logging into a server on a specific interval, defined from a CloudWatch event rule. There are multiple servers that need to be logged into on different intervals, each defined by their own respective CloudWatch event rule. However, I only want one lambda function invocation hitting a specific server at a time. Can each CloudWatch event rule be limited to just one lambda function invocation at a time, or would I have to create a duplicate lambda function for each specific CloudWatch event rule and set the concurrent invocation to 1 that way? I was hoping to avoid that as it just adds duplicate lambda functions. I'd just want to keep it simple, if possible.

Answer 1

If you know the IDs of these instances, you can pass them as arguments to your CloudWatch Event rules in the form of constant :

Your single function would get the ID of the instance from the event object and perform operations on that one specific instance.