Serverless Function With Python and AWS Lambda
Download as PPTX, PDF•0 likes•210 views
This document provides an overview of serverless functions using Python and AWS Lambda. It introduces AWS Lambda as a compute service that lets you run code without provisioning or managing servers, and pays only for the compute time used. It also discusses API Gateway for creating and maintaining APIs, and how to structure Python functions for Lambda. Example Python code is provided for Lambda function syntax, logging, and exception handling.
Serverless Function With Python and AWS Lambda
- 1. Serverless Function With Python and AWS Lambda
- 2. Hello! Nice to meet you My Name is Fitrah Elly Firdaus. I am Software Engineer at Traveloka. Contact me at: ▪ [email protected] ▪ @FEF123
- 3. Table of contents 1. AWS Lambda 2. API Gateway 3. Python With Lambda 3
- 5. What is AWS Lambda • Run code without thinking about servers. Pay only for the compute time you consume. • First 1M requests per month are free. • 400.000 GB-Seconds of compute time per month, free. • $0.20 per 1M requests thereafter, $0.0000002 per request. • $0.00001667 for every GB-Second used thereafter • Supported Language: Python, Go, Java, NodeJS, C# 5
- 7. Use Cases • Data Processing • Real Time File Processing • Real Time Stream Processing • Extract, Transform and Load • Backend • IOT Backends • Mobile Backends • Web Applications 7
- 10. What is API Gateway • Create, Maintain, and secure API at any scale • First 1M API Calls per month are free • $4.25 per million API calls received, plus the cost of data transfer out, in gigabytes. 10
- 13. General Syntax Structure def handler_name(event, context): ... return some_value 13
- 14. What is event? • Usually python dict type • list • str • int • float • NoneType • Proxy Integration if using API Gateway 14
- 15. What is context • This information usually contain • How much time is remaining before AWS Lambda terminates your Lambda function • Cloudwatch log group • AWS Request ID • Mobile Application function, if called from mobile apps 15
- 16. What is context Object Methods • get_remaining_time_in_millis() • Returns the remaining execution time, in milliseconds, until AWS Lambda terminates the function. 16
- 17. What is context Object attributes • function_name • function_version • invoked_function_arn • memory_limit_in_mb • aws_request_id • log_group_name • log_stream_name • identity • client_context 17
- 18. Format of a Lambda Function for Proxy Integration { "isBase64Encoded": true|false, "statusCode": httpStatusCode, "headers": { "headerName": "headerValue", ... }, "body": "...” } 18
- 19. How to log the handler import logging logger = logging.getLogger() logger.setLevel(logging.INFO) def my_logging_handler(event, context): logger.info('got event{}'.format(event)) logger.error('something went wrong’) return 'Hello from Lambda!' 19
- 20. CloudWatch 20
- 21. How to create exception def always_failed_handler(event, context): raise Exception('I failed!') 21
- 22. LITTLE DEMO https://github.com/fitrah-firdaus/Simple-Crud- Lambda-Python 22
- 23. Thank you very much for your time 23 If you have any questions about this document please don’t hesitate to contact me at: ▪ [email protected] ▪ @FEF123 ▪ @pythonID
Editor's Notes
- #18: Information about the client application and device when invoked through the AWS Mobile SDK. It can be null. client_context.client.installation_id client_context.client.app_title client_context.client.app_version_name client_context.client.app_version_code client_context.client.app_package_name client_context.custom A dict of custom values set by the mobile client application. client_context.env A dict of environment information provided by the AWS Mobile SDK.