AWS Lambda¶

You can run your application without having to manage any EC2 instances or containers
HA and scaling is built in
Application types:
- data processing
- real-time stream processing
- machine learning
- WebSockets
- IoT backends
- mobile backends
- web applications
You can configure labmda function using:
- Lambda console
- Lambda API
- AWS CloudFormation
- AWS Serverless Application Model (AWS SAM)
You can invoke your function:
- directly by using the Lambda API
- you can configure an AWS service or resource to invoke your function in response to an event.

Managing¶

application framework
- supports the package (ZIP archive to an Amazon S3 bucket) and deploy (deploy to AWS Lambda) steps
code repository
- multiple Lambda functions per service
- each service has own template, and use one repository per service and template
development environment
- separate prod and other environments in different AWS accounts
- strategies for developers
  - one AWS for every developer if you have management process in place to handle it
  - use one AWS account for every developers

Unit tests
Mocking options
- DynamoDB local and LocalStack
- Custom mocks
  - Require developers's time
  - But it maybe less expensive in case when you are trying to test an application that relies on multiple services interacting with each other.

You can't connect to remote lambda
But you can use SAM CLI to connect to your application. You local version of application is updated in SAM CLI image and you can debug it.