Serverless

Lambda

computer service
supported languages
- NodeJS
- Java
- Python
- C#
- Go
- Powershell
- Ruby
first 1 million requests per month are free
$0.20 per next 1 million requests
more memory, higher cost
X-ray to degug ??
triggers
- API Gateway
- IoT
- Alexa Skills Kit
- Alexa Smart Home
- Application Load Balancer
- CloudFront
- CloudWatch
- CloudWatch Logs
- CodeCommit
- Cognito Sync Trigger
- DynamoDB
- Kinesis
- S3
- SNS
- SQS
Qualified/Unqualified ARNs
- no suffix is unqualified,
- $LATEST or alias (PROD/DEV/etc)
- split traffic between 2 versions by percent (except $LATEST)
- cannot modify non $LATEST versions

Serverless Services

Lambda/Lambda@Edge
S3
EFS
API Gateway
RDS Aurora Serverless
DynamoDB
Fargate
SNS
SQS
Step Functions
AppSync
EventBridge
Kinesis
Athena

API Gateway

can cache response for TTL seconds
CORS (hot topic in test)
Can import from a Swagger 2.0/3.0 file
throttle to 10,000 rps (HTTP error 429)
- limit can be changed, but will cost
- per AWS account, NOT region or gateway
max concurrent requests is 5000 per account (HTTP error 429)
- limit can be changed, but will cost
- per AWS account, NOT region or gateway
can use as SOAP pass through

Step Functions

workflow orchestration with Amazon States Language (JSON)
types of workflows
- sequential
- branching
- parallel
see jobs running the Batch
clean up with delete of CloudFormation stack

X-Ray

SDK provides
- interceptors
- client handlers
- HTTP client to instrument other services