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Serverless 101

EC2 Launches 2006 (provision machines from CLI -> IAAS born!) Data Centre -> IAAS (EC2) -> PAAS (Azure/ElasticBeanstalk) -> Containers (Docker) -> Serverless (Lambda)

Lab Example

• Setup S3 Bucket with Public Site Hosting Setup
  • Upload index.html & error.html
• Register Route53 (need bucket & domain name to be same)
• Create Lambda Function - multiple options (select author from scratch)
  • Author from Scratch
  • Blueprints
  • Serverless App Repository (CF Templates)
• Provide Name, Create Role for Lambda (policy template: simple microservice permissions) -> Create Function.
• Scroll to Function code (used to be ‘Cloud 9’ IDE) copy pasta in code sample below
• Select ‘Add Trigger’ -> [popular exam - which of the following is not a trigger] -> select API Gateway
  • Configure triggers -> pick an existing API, or create a new one (create new one -> filling in UI)
• Need to configure GET endpoint in Amazon API Gateway & then deploy API

Sample Lambda Function (python)

def lambda_handler(event, context):
    print("In lambda handler")

    resp = {
        "statusCode": 200,
        "headers": {
            "Access-Control-Allow-Origin": "*",
        },
        "body": "Dan McM"
    }

    return resp