Day 47: Integrating AWS SQS and SNS for Reliable Messaging | KodeKloud #kodekloud #100

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Cloud Formation Template :
AWSTemplateFormatVersion: '2010-09-09'
Description: Priority Queue Processing Stack

Resources:

HighPriorityQueue:
Type: AWS::SQS::Queue
Properties:
QueueName: devops-High-Priority-Queue
VisibilityTimeout: 30

LowPriorityQueue:
Type: AWS::SQS::Queue
Properties:
QueueName: devops-Low-Priority-Queue
VisibilityTimeout: 30

PriorityQueueTopic:
Type: AWS::SNS::Topic
Properties:
TopicName: devops-Priority-Queues-Topic

HighPrioritySubscription:
Type: AWS::SNS::Subscription
Properties:
TopicArn: !Ref PriorityQueueTopic
Protocol: sqs
Endpoint: !GetAtt HighPriorityQueue.Arn
FilterPolicy:
priority:
- high

LowPrioritySubscription:
Type: AWS::SNS::Subscription
Properties:
TopicArn: !Ref PriorityQueueTopic
Protocol: sqs
Endpoint: !GetAtt LowPriorityQueue.Arn
FilterPolicy:
priority:
- low

HighPriorityPolicy:
Type: AWS::SQS::QueuePolicy
Properties:
Queues:
- !Ref HighPriorityQueue
PolicyDocument:
Version: '2012-10-17'
Statement:
- Effect: Allow
Principal: "*"
Action: "sqs:SendMessage"
Resource: !GetAtt HighPriorityQueue.Arn
Condition:
ArnEquals:
aws:SourceArn: !Ref PriorityQueueTopic

LowPriorityPolicy:
Type: AWS::SQS::QueuePolicy
Properties:
Queues:
- !Ref LowPriorityQueue
PolicyDocument:
Version: '2012-10-17'
Statement:
- Effect: Allow
Principal: "*"
Action: "sqs:SendMessage"
Resource: !GetAtt LowPriorityQueue.Arn
Condition:
ArnEquals:
aws:SourceArn: !Ref PriorityQueueTopic

LambdaExecutionRole:
Type: AWS::IAM::Role
Properties:
RoleName: lambda_execution_role
AssumeRolePolicyDocument:
Version: '2012-10-17'
Statement:
- Effect: Allow
Principal:
Service: lambda.amazonaws.com
Action: sts:AssumeRole
ManagedPolicyArns:
- arn:aws:iam::aws:policy/service-role/AWSLambdaBasicExecutionRole
- arn:aws:iam::aws:policy/AmazonSQSFullAccess
- arn:aws:iam::aws:policy/AmazonSNSFullAccess

PriorityLambdaFunction:
Type: AWS::Lambda::Function
Properties:
FunctionName: devops-priorities-queue-function
Runtime: python3.9
Handler: index.lambda_handler
Role: !GetAtt LambdaExecutionRole.Arn
Timeout: 560
Environment:
Variables:
high_priority_queue: !Ref HighPriorityQueue
low_priority_queue: !Ref LowPriorityQueue
Code:
S3Bucket: kklabuser-313878
S3Key: function-code.zip
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