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lambda-option-cf.yml
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lambda-option-cf.yml
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---
AWSTemplateFormatVersion: '2010-09-09'
Resources:
# This section creates a dummy Lambda function, an SQS queue, and
# an Event Source Mapping that connects the two.
FunctionRole:
Type: AWS::IAM::Role
Properties:
AssumeRolePolicyDocument:
Version: '2012-10-17'
Statement:
- Effect: Allow
Principal:
Service:
- lambda.amazonaws.com
Action:
- 'sts:AssumeRole'
Policies:
- PolicyName: root
PolicyDocument:
Version: '2012-10-17'
Statement:
- Effect: Allow
Action:
- 'sqs:ReceiveMessage'
- 'sqs:DeleteMessage'
- 'sqs:GetQueueAttributes'
Resource: !GetAtt Queue.Arn
Function:
Type: AWS::Lambda::Function
Properties:
Code:
ZipFile: |
omitted
FunctionName: night-lambda-function-2
Handler: example.only
Role: !GetAtt FunctionRole.Arn
Runtime: nodejs12.x
Queue:
Type: AWS::SQS::Queue
EventSourceMapping:
Type: AWS::Lambda::EventSourceMapping
Properties:
EventSourceArn: !GetAtt Queue.Arn
FunctionName: !GetAtt Function.Arn
# This section creates a Lambda function that contains code to
# call Lambda's UpdateEventSourceMapping API action. It also
# gives EventBridge permission to invoke the function.
ToggleFunctionRole:
Type: AWS::IAM::Role
Properties:
AssumeRolePolicyDocument:
Version: '2012-10-17'
Statement:
- Effect: Allow
Principal:
Service:
- lambda.amazonaws.com
Action:
- 'sts:AssumeRole'
Policies:
- PolicyName: root
PolicyDocument:
Version: '2012-10-17'
Statement:
- Effect: Allow
Action: 'lambda:UpdateEventSourceMapping'
Resource: !Sub
- 'arn:aws:lambda:${Region}:${AccountId}:event-source-mapping:${UUID}'
- Region: !Ref AWS::Region
AccountId: !Ref AWS::AccountId
UUID: !Ref EventSourceMapping
EventBridgeEnablePermission:
Type: AWS::Lambda::Permission
Properties:
FunctionName: !GetAtt ToggleFunction.Arn
Action: lambda:InvokeFunction
Principal: events.amazonaws.com
SourceArn: !GetAtt EnableRule.Arn
EventBridgeDisablePermission:
Type: AWS::Lambda::Permission
Properties:
FunctionName: !GetAtt ToggleFunction.Arn
Action: lambda:InvokeFunction
Principal: events.amazonaws.com
SourceArn: !GetAtt DisableRule.Arn
ToggleFunction:
Type: AWS::Lambda::Function
Properties:
Code:
ZipFile: |
const AWS = require('aws-sdk')
const lambda = new AWS.Lambda();
exports.handler = async (event) => {
const params = {
UUID: event.uuid,
Enabled: event.enabled
};
return await lambda.updateEventSourceMapping(params).promise();
};
FunctionName: night-lambda-toggle-function
Handler: index.handler
Role: !GetAtt ToggleFunctionRole.Arn
Runtime: nodejs12.x
# This section creates two self-triggering EventBridge rules, each with
# Lambda target. These two rules Invoke the above Lambda to enable and
# disable the above Event Source Mapping on a schedule.
EnableRule:
Type: AWS::Events::Rule
Properties:
Name: enable-night-lambda-2
ScheduleExpression: 'cron(0 1 * * ? *)'
Targets:
- Id: LambdaTarget
Arn: !GetAtt ToggleFunction.Arn
Input: !Sub
- '{ "enabled": true, "uuid": "${UUID}" }'
- UUID: !Ref EventSourceMapping
RetryPolicy:
MaximumEventAgeInSeconds: 3600
DisableRule:
Type: AWS::Events::Rule
Properties:
Name: disable-night-lambda-2
ScheduleExpression: 'cron(0 6 * * ? *)'
Targets:
- Id: LambdaTarget
Arn: !GetAtt ToggleFunction.Arn
Input: !Sub
- '{ "enabled": false, "uuid": "${UUID}" }'
- UUID: !Ref EventSourceMapping
RetryPolicy:
MaximumEventAgeInSeconds: 3600