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template.yaml
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template.yaml
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AWSTemplateFormatVersion: '2010-09-09'
Description: 'AWS CloudFormation Template to update config recorder settings in child accounts created by ControlTower.'
Parameters:
ExcludedAccounts:
Description: Excluded Accounts list. This list should contain Management account, Log Archive and Audit accounts at the minimum
Default: "['111111111111', '222222222222', '333333333333']"
MaxLength: '2000'
MinLength: '36'
Type: String
ConfigRecorderExcludedResourceTypes:
Description: List of all resource types to be excluded from Config Recorder
Default: "AWS::HealthLake::FHIRDatastore,AWS::Pinpoint::Segment,AWS::Pinpoint::ApplicationSettings"
Type: String
ConfigRecorderDailyResourceTypes:
Description: List of all resource types to be set to a daily cadence
Default: "AWS::AutoScaling::AutoScalingGroup,AWS::AutoScaling::LaunchConfiguration"
Type: String
ConfigRecorderDefaultRecordingFrequency:
Description: Default Frequency of recording configuration changes.
Default: CONTINUOUS
Type: String
AllowedValues:
- CONTINUOUS
- DAILY
CloudFormationVersion:
Type: String
Default: 1
Resources:
LambdaZipsBucket:
Type: AWS::S3::Bucket
Properties:
BucketEncryption:
ServerSideEncryptionConfiguration:
- ServerSideEncryptionByDefault:
SSEAlgorithm: AES256
LambdaZipsBucketPolicy:
Type: AWS::S3::BucketPolicy
Properties:
Bucket:
Ref: LambdaZipsBucket
PolicyDocument:
Statement:
- Effect: Deny
Action: "s3:*"
Principal: "*"
Resource:
- !Sub 'arn:aws:s3:::${LambdaZipsBucket}'
- !Sub 'arn:aws:s3:::${LambdaZipsBucket}/*'
Condition:
Bool:
aws:SecureTransport: false
ProducerLambda:
Type: AWS::Lambda::Function
DeletionPolicy: Retain
DependsOn: CopyZips
Properties:
Code:
S3Bucket: !Ref LambdaZipsBucket
S3Key: ct-blogs-content/ct_configrecorder_override_producer.zip
Handler: ct_configrecorder_override_producer.lambda_handler
Role: !GetAtt ProducerLambdaExecutionRole.Arn
Runtime: python3.12
MemorySize: 128
Timeout: 300
Architectures:
- x86_64
ReservedConcurrentExecutions: 1
Environment:
Variables:
EXCLUDED_ACCOUNTS: !Ref ExcludedAccounts
LOG_LEVEL: INFO
SQS_URL: !Ref SQSConfigRecorder
ProducerLambdaPermissions:
Type: AWS::Lambda::Permission
DeletionPolicy: Retain
Properties:
Action: 'lambda:InvokeFunction'
FunctionName: !Ref ProducerLambda
Principal: 'events.amazonaws.com'
SourceArn: !GetAtt ProducerEventTrigger.Arn
ConsumerLambda:
Type: AWS::Lambda::Function
DeletionPolicy: Retain
DependsOn: CopyZips
Properties:
Code:
S3Bucket: !Ref LambdaZipsBucket
S3Key: ct-blogs-content/ct_configrecorder_override_consumer.zip
Handler: ct_configrecorder_override_consumer.lambda_handler
Role: !GetAtt ConsumerLambdaExecutionRole.Arn
Runtime: python3.12
MemorySize: 128
Timeout: 180
Architectures:
- x86_64
ReservedConcurrentExecutions: 10
Environment:
Variables:
LOG_LEVEL: INFO
CONFIG_RECORDER_OVERRIDE_DAILY_RESOURCE_LIST: !Ref ConfigRecorderDailyResourceTypes
CONFIG_RECORDER_OVERRIDE_EXCLUDED_RESOURCE_LIST: !Ref ConfigRecorderExcludedResourceTypes
CONFIG_RECORDER_DEFAULT_RECORDING_FREQUENCY: !Ref ConfigRecorderDefaultRecordingFrequency
ConsumerLambdaEventSourceMapping:
Type: AWS::Lambda::EventSourceMapping
DeletionPolicy: Retain
Properties:
BatchSize: 1
Enabled: true
EventSourceArn: !GetAtt SQSConfigRecorder.Arn
FunctionName: !GetAtt ConsumerLambda.Arn
ProducerLambdaExecutionRole:
Type: 'AWS::IAM::Role'
DeletionPolicy: Retain
Properties:
ManagedPolicyArns:
- !Sub 'arn:${AWS::Partition}:iam::aws:policy/service-role/AWSLambdaBasicExecutionRole'
AssumeRolePolicyDocument:
Version: '2012-10-17'
Statement:
- Effect: Allow
Principal:
Service:
- lambda.amazonaws.com
Action:
- 'sts:AssumeRole'
Path: /
Policies:
- PolicyName: ct_cro_producer
PolicyDocument:
Version: '2012-10-17'
Statement:
- Effect: Allow
Action:
- cloudformation:ListStackInstances
Resource: !Sub 'arn:${AWS::Partition}:cloudformation:*:*:stackset/AWSControlTowerBP-BASELINE-CONFIG:*'
- Effect: Allow
Action:
- sqs:DeleteMessage
- sqs:ReceiveMessage
- sqs:SendMessage
- sqs:GetQueueAttributes
Resource: !GetAtt SQSConfigRecorder.Arn
ConsumerLambdaExecutionRole:
Type: 'AWS::IAM::Role'
DeletionPolicy: Retain
Properties:
ManagedPolicyArns:
- !Sub 'arn:${AWS::Partition}:iam::aws:policy/service-role/AWSLambdaBasicExecutionRole'
AssumeRolePolicyDocument:
Version: '2012-10-17'
Statement:
- Effect: Allow
Principal:
Service:
- lambda.amazonaws.com
Action:
- 'sts:AssumeRole'
Path: /
Policies:
- PolicyName: policy-sts-all
PolicyDocument:
Version: '2012-10-17'
Statement:
- Effect: Allow
Action:
- sts:AssumeRole
Resource: "*"
- Effect: Allow
Action:
- sqs:DeleteMessage
- sqs:ReceiveMessage
- sqs:SendMessage
- sqs:GetQueueAttributes
Resource: !GetAtt SQSConfigRecorder.Arn
SQSConfigRecorder:
Type: AWS::SQS::Queue
DeletionPolicy: Retain
Properties:
VisibilityTimeout: 180
DelaySeconds: 5
KmsMasterKeyId: alias/aws/sqs
ProducerEventTrigger:
Type: AWS::Events::Rule
Properties:
Description: "Rule to trigger config recorder override producer lambda"
EventBusName: default
EventPattern: '{
"source": ["aws.controltower"],
"detail-type": ["AWS Service Event via CloudTrail"],
"detail": {
"eventName": ["UpdateLandingZone", "CreateManagedAccount", "UpdateManagedAccount"]
}
}'
Name: !GetAtt SQSConfigRecorder.QueueName
State: ENABLED
Targets:
-
Arn:
Fn::GetAtt:
- "ProducerLambda"
- "Arn"
Id: "ProducerTarget"
ProducerLambdaTrigger:
Type: 'Custom::ExecuteLambda'
Properties:
ServiceToken: !GetAtt "ProducerLambda.Arn"
FunctionName: !Ref ProducerLambda
Version: !Ref CloudFormationVersion
CopyZips:
Type: Custom::CopyZips
Properties:
ServiceToken: !GetAtt 'CopyZipsFunction.Arn'
DestBucket: !Ref 'LambdaZipsBucket'
SourceBucket: marketplace-sa-resources
Prefix: ct-blogs-content/
Objects:
- 'ct_configrecorder_override_producer.zip'
- 'ct_configrecorder_override_consumer.zip'
CopyZipsRole:
Type: AWS::IAM::Role
Properties:
AssumeRolePolicyDocument:
Version: '2012-10-17'
Statement:
- Effect: Allow
Principal:
Service: lambda.amazonaws.com
Action: sts:AssumeRole
ManagedPolicyArns:
- !Sub 'arn:${AWS::Partition}:iam::aws:policy/service-role/AWSLambdaBasicExecutionRole'
Path: /
Policies:
- PolicyName: lambda-copier
PolicyDocument:
Version: '2012-10-17'
Statement:
- Effect: Allow
Action:
- s3:GetObject
- s3:GetObjectTagging
Resource: !Sub 'arn:${AWS::Partition}:s3:::marketplace-sa-resources/ct-blogs-content/*'
- Effect: Allow
Action:
- s3:PutObject
- s3:DeleteObject
- s3:PutObjectTagging
Resource:
- !Sub 'arn:${AWS::Partition}:s3:::${LambdaZipsBucket}/ct-blogs-content/*'
CopyZipsFunction:
Type: AWS::Lambda::Function
Properties:
Description: Copies objects from the S3 bucket to a new location.
Handler: index.handler
Runtime: python3.12
Role: !GetAtt 'CopyZipsRole.Arn'
ReservedConcurrentExecutions: 1
Timeout: 300
Code:
ZipFile: |
import json
import logging
import threading
import boto3
import cfnresponse
def copy_objects(source_bucket, dest_bucket, prefix, objects):
s3 = boto3.client('s3')
for o in objects:
key = prefix + o
copy_source = {
'Bucket': source_bucket,
'Key': key
}
print('copy_source: %s' % copy_source)
print('dest_bucket = %s'%dest_bucket)
print('key = %s' %key)
s3.copy_object(CopySource=copy_source, Bucket=dest_bucket,
Key=key)
def delete_objects(bucket, prefix, objects):
s3 = boto3.client('s3')
objects = {'Objects': [{'Key': prefix + o} for o in objects]}
s3.delete_objects(Bucket=bucket, Delete=objects)
def timeout(event, context):
logging.error('Execution is about to time out, sending failure response to CloudFormation')
cfnresponse.send(event, context, cfnresponse.FAILED, {}, None)
def handler(event, context):
# make sure we send a failure to CloudFormation if the function
# is going to timeout
timer = threading.Timer((context.get_remaining_time_in_millis()
/ 1000.00) - 0.5, timeout, args=[event, context])
timer.start()
print('Received event: %s' % json.dumps(event))
status = cfnresponse.SUCCESS
try:
source_bucket = event['ResourceProperties']['SourceBucket']
dest_bucket = event['ResourceProperties']['DestBucket']
prefix = event['ResourceProperties']['Prefix']
objects = event['ResourceProperties']['Objects']
if event['RequestType'] == 'Delete':
delete_objects(dest_bucket, prefix, objects)
else:
copy_objects(source_bucket, dest_bucket, prefix, objects)
except Exception as e:
logging.error('Exception: %s' % e, exc_info=True)
status = cfnresponse.FAILED
finally:
timer.cancel()
cfnresponse.send(event, context, status, {}, None)