AWS Lambda
Build serverless applications with AWS Lambda.
Create Function
Create function
aws lambda create-function
--function-name myfunction
--runtime python3.11
--handler app.handler
--role arn:aws:iam::xxx:role/lambda-role
--zip-file fileb://function.zip
Update code
aws lambda update-function-code
--function-name myfunction
--zip-file fileb://function.zip
Function Code
app.py
import json
def handler(event, context): return { 'statusCode': 200, 'body': json.dumps({'message': 'Hello!'}) }
API Gateway Integration
Create REST API
aws apigateway create-rest-api --name myapi
Add Lambda permission
aws lambda add-permission
--function-name myfunction
--statement-id apigateway
--action lambda:InvokeFunction
--principal apigateway.amazonaws.com
Environment & Configuration
Set environment variables
aws lambda update-function-configuration
--function-name myfunction
--environment "Variables={DB_HOST=xxx,API_KEY=yyy}"
Set memory and timeout
aws lambda update-function-configuration
--function-name myfunction
--memory-size 256
--timeout 30
Best Practices
-
Minimize cold starts
-
Use layers for dependencies
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Implement proper error handling
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Use provisioned concurrency for latency-sensitive functions
-
Monitor with CloudWatch
Related Skills
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terraform-aws - IaC deployment
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aws-iam - Execution roles