Serverless Deployment with AWS
About Me
About Me
About Me
18 Years in Business
10 Years @ Java2Days
Published Author
Software Consultants
Invented the Internet
To our success!
WebSocket Book
http://bit.ly/websocketbook
Incomplete History of Deployment
Rack Servers
Traditional IT
PaaS
Serverless / FaaS
What is Serverless?
- No server / instance management
- Auto Scaling Provision based on load
- Costs measured on usage
- High availability
Service Models
Backend as a Service (BaaS)
Function as a Service (FaaS)
FaaS
Event driven
Runs user functions
Auto scaled and provisioned
Precise costs
Stateless
FaaS vs PaaS
In a PaaS environment, scaling is still your problem, with FaaS it's handled.
Supported Languages / Platforms
- Node.js
- Python (3.6, 3.7, 2.7)
- Java 8
- C# (.NET Core)
- Go
Events / Triggers
| S3 | DynamoDB | Kinesis Data Streams | SNS |
| SES | SQS | Cognito | CloudFormation |
| CloudWatch Logs | CloudWatch Events | CodeCommit | Scheduled Events |
| AWS Config | Alexa | Lex | API Gateway |
| AWS IoT Button | CloudFront | Kinesis Data Firehose | Invoke Lambda Function On Demand |
Lambda Behind the Scenes
- $ per GB/sec, 100ms increments
- Containers on EC2
- Created on demand
- Reaped when idle, old or obsolete
Structure of Lambda
event – event data passed to handler
context – runtime information to your handler. Type is LambdaContext
Handler can return a value, depends on invocation type
Stocks App
Implementation using standard Python
Lambda Function Python
import json
def handler(event, context):
pass
Convert to Lambda
API Gateway
Deploying
aws lambda update-function-code --function-name getStocks --zip-file fileb://lambda.zip
Lambda Versioning
- Creates new version
- $LATEST is current version
- Previous versions immutable
- Publish via AWS Console, CLI, or SDK
Testing
Testing Function
Lambda is just plain function call, so nosetests with asserts would work fine.
Using python-lambda-local
python-lambda-local is a library for running a lambda locally
https://pypi.org/project/python-lambda-local/
python-lambda-local -f handler -t 5 test.py event.json
Localstack
Localstack Services
API Gateway, Kinesis, DynamoDB, DynamoDB Streams, Elasticsearch, S3, Firehose, Lambda, SNS, SQS, Redshift, ES (Elasticsearch Service), SES, Route53, CloudFormation, CloudWatch, SSM, SecretsManager
AWS SAM
Extension to CloudFormation, makes it easier to deploy without having to understand CF templates
Lambda Frameworks
Apex https://apex.run -- offers support for Clojure and Rust
Chalice https://github.com/aws/chalice
Serverless https://serverless.com/
край
Q & A
Andrew Lombardi / @kinabalu
Mystic Coders, LLC