Scenario: Application

• Customer: I have an application which should be running on the cloud. The application is very specific and not used all the time (approximately used 4 hours (average) in a day). I want to know the hosting options in aws

• Customer problem statement: I want to be billed/charged only when my application is used by customers

• This is where Serverless will be handy.

• Serverless technology internally will provision servers when the code (written as functions) is called.

• This technology will help you to be charged/billed only when your code is being called.

• In AWS, Serverless can be used in a Service called as AWS Lambda

• Different Languages where AWS Lambda can be written

  • Node.js
  • Python
  • Ruby
  • Java
  • Go
  • C#
  • Powershell

• Advantages:

  • You pay only for the compute time you consume
  • Code is executed only when need and scales automatically

• Disadvantages:

  • No standards (Portability is difficult)

• Scenarios:

  • Infrequently used appications on web
  • backend jobs
  • automation

• Walkthrough:

• Usecases:

  • Auto-scaling APIs
  • Event Streaming
  • Image and Video Processing
  • Multi language applications

Concepts

1. Function: function is a code that processes events which can be be invoked.
2. Runtime: Runtime allowes functions in different languages to run in the execution environment.
3. Event: An event is a Json formatted document that contains data for function to be processed
4. Trigger: A trigger is a configuration or a resource which invokes lambda function

Pricing

• Refer Here

AWS Boto3

• Boto3 is aws sdk for python Refer Here