AWS Lambda

wikipedia:AWS Lambda (Nov 2014) is an event-driven, serverless computing platform. It is a computing service that runs code in response to Events and automatically manages the computing resources required by that code. It was introduced in November 2014. Other similar solutions in the market are Google Cloud functions, Oracle Cloud Fn and Azure Functions.

VPC configuration for AWS Lambda function is optional unless your user permissions require you to configure a VPC.

Free tier

The AWS Lambda free usage tier includes 1M free requests per month and 400,000 GB-seconds (1GB-111 hours) of compute time per month.

Examples

exports.handler = async (event) => {
    const response = {
        statusCode: 200,
        body: JSON.stringify('Hello from Lambda!'),
    };
    return response;
};

Python Example

import json

def lambda_handler(event, context):
    # TODO implement
    return {
        'statusCode': 200,
        'body': json.dumps('Hello from Lambda!')
    }

Rotation by Lambda function

• https://docs.aws.amazon.com/secretsmanager/latest/userguide/rotate-secrets_lambda.html

{
    "Step" : "request.type",
    "SecretId" : "string",
    "ClientRequestToken" : "string"
    }

Related terms

• AWS API Gateway
• Amazon CloudWatch Lambda Insights
• Functions and applications
• Cloudformation: AWS::Lambda
• aws elbv2 create-target-group --target-type [ instance | ip | lambda ]
• Timeout
• Terraform resource: aws lambda event source mapping
• AWS Step Functions
• DigitalOcean Functions
• Cloudflare Workers (Sep 2017)
• AWS Secrets Manager
• aws_lambda_function
• AWS Chalice microframework for writing serverless apps in python
• AWS Config: lambda-function-public-access-prohibited
• Cloudtrail: Logging All Lambda Function Invocations By Using Basic Event Selectors

See also

• AWS Lambda: aws lambda [ list-functions | create-function | update-function-code | create-alias ], AWS::Lambda::Function
• AWS Lambda, aws lambda, AWS::Lambda, lambda handler
• Serverless computing, Serverless on AWS, AWS Lambda, Azure Functions, sam. AWS Proton, Serverless, Knative, DigitalOcean Functions

https://aws.amazon.com/about-aws/whats-new/2014/11/13/introducing-aws-lambda/

https://en.wikiversity.org/wiki/Cloud_computing/Amazon_Web_Services/AWS_Lambda