CloudFormation for serverless services

In this section, we will learn how CloudFormation can be used to build and deploy Lambda functions. We will do the following:

1. We will write a CloudFormation template for a Lambda function that periodically pings a website and gives an error if there is any failure in the process. The CloudFormation template for this is as follows:

AWSTemplateFormatVersion: '2010-09-09'
Transform: 'AWS::Serverless-2016-10-31'
Description: 'Performs a periodic check of the given site, erroring out on test failure.'
Resources:
lambdacanary:
    Type: 'AWS::Serverless::Function'
    Properties:
        Handler: lambda_function.lambda_handler
        Runtime: python2.7
        CodeUri: .
        Description: >-
            Performs a periodic check of the given site, 
erroring out on test failure.
    MemorySize: 128
    Timeout: 10
    Events:
        Schedule1:
        Type: Schedule
        Properties:
            Schedule: rate(1 minute)
    Environment:
        Variables...