I'm trying to insert records into a Postgres database in RDS from a Lambda function. My Node.js lambda function works correctly when run locally, but the database connection times out when run in AWS.
I've read several articles and tutorials which suggest that AWS Lambda functions cannot access RDS instances that are within a VPC. For example: http://ashiina.github.io/2015/01/amazon-lambda-first-impression/
Unfortunately; it seems I am unable to create an RDS instance that exists outside of a VPC. At this dropdown I would expect to be able to select an option for "No VPC" or something along those lines.
Has this option been removed? Perhaps I have missed a step?
You can create a publicly accessible RDS instance. Then you should be able to access it from anywhere, inside or outside AWS. I believe that would get around your issue with Lambda. You are asked if the instances needs to be publicly accessible when you create a new RDS instance via the web console.
Or you could just wait a few weeks, as Lambda within a VPC is supposed to be enabled "later this year".
Edit: Note that newer Amazon accounts are restricted to VPC only resources. You can't create EC2 or RDS instances outside of a VPC anymore. That's why you don't see the "No VPC" option anymore.
Second Edit: VPC access for Lambda functions is now genearally available.
This question is awhile back, but for those of you who are using MySQL, now you can connect AWS Lambda with Aurora Serverless without VPC, utilizing their new Data API. Take a look at this example for details https://coderecipe.ai/architectures/77374273
来源：https://stackoverflow.com/questions/34211843/is-it-possible-to-launch-an-rds-instance-without-a-vpc