At the end of this exercise, we have achieved the following:
- Set up a VPC with public and private subnets, NAT Gateway, and appropriate security groups
- Moved RDS to the private subnet
- Moved Lambda to the private subnet
- Enabled Lambda to access the internet
- Connected Lambda to RDS through security groups
- Modified Lambda to source configuration parameters from environment variables
- Used KMS to encrypt the environment variables and decoded them in lambda
- Throttled the API Gateway usage through API Key and Usage plans
The treatment in this walkthrough that was applied to the Greeter lambda function can be easily extended to the other lambda functions that make up our LetsPoll Serverless App. We will see how this ...
