I believe to support RDS in Lambda you'll either need to dynamically add the Lambda instance's public IP address to your RDS security group (and remove it once

I believe to support RDS in Lambda you'll either need to dynamically add the Lambda instance's public IP address to your RDS security group (and remove it once complete) on each run or make the RDS instance open to a large number of AWS IP ranges^1 [1] http://docs.aws.amazon.com/general/latest/gr/aws-ip-ranges.html http://docs.aws.amazon.com/general/latest/gr/aws-ip-ranges.h...