application-account-initial-setup.yaml

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AWSTemplateFormatVersion: '2010-09-09'
Description: Initialize the Compliance-as-Code oversight in this Application Account

Metadata:
  AWS::CloudFormation::Interface:
    ParameterGroups:
      - Label:
          default: Compliance-as-Code Engine Configuration
        Parameters:
         - MainRegion
         - ComplianceAccountId
         - ConfigAndComplianceAuditRoleName
         - CentralizedS3BucketConfigFullName
      - Label:
          default: (Advanced User Only) Deployment options
        Parameters:
         - DeployAWSConfig
         - RuleFrequency
         - LambdaFunctionName
         - EngineComplianceRule

Parameters:
  CentralizedS3BucketConfigFullName:
    ConstraintDescription: Enter DNS-compliant name
    Description: (Only if DeployAWSConfig is set to "true") Bucket name where Config logs are centrally stored. It is located in the Compliance Account.
    Default: centralized-config-112233445566
    MaxLength: 63
    MinLength: 10
    Type: String
  ComplianceAccountId:
    ConstraintDescription: 12 digits, no dashes
    Description: Account ID of the Compliance Account. The compliance-as-code engine must be installed in this account first.
    Default: 112233445566
    MaxLength: 12
    MinLength: 12
    Type: String
  ConfigAndComplianceAuditRoleName:
    Description: (Only if DeployAWSConfig is set to "true") Role Name of the Compliance Account Cross Account Role
    Default: AWSConfigAndComplianceAuditRole-DO-NOT-DELETE
    Type: String
  MainRegion:
    Description: Region which is designated as main Region in your Compliance Account.
    Default: us-west-2
    AllowedValues: 
    - us-east-1
    - us-east-2
    - us-west-1
    - us-west-2
    - ap-south-1
    - ap-northeast-1
    - ap-northeast-2
    - ap-southeast-1
    - ap-southeast-2
    - ca-central-1
    - eu-central-1
    - eu-west-1
    - eu-west-2
    - eu-west-3
    - sa-east-1
    AllowedPattern: ^.{0,14}$
    ConstraintDescription: Select one AWS Region only.
    Type: String
  EngineComplianceRule:
    Description: Rule name which review the state of this deployment
    Default: COMPLIANCE_RULESET_LATEST_INSTALLED
    Type: String
  RuleFrequency:
    Description: Frequency to verify the compliance of this deployment
    AllowedValues:
     - One_Hour
     - Three_Hours
     - Six_Hours
     - Twelve_Hours
     - TwentyFour_Hours
    Default: One_Hour
    Type: String
  LambdaFunctionName:
    Description: Lambda name in the Compliance Account
    Default: RDK-Rule-Function-COMPLIANCERULESETLATESTINSTALLED
    Type: String
  DeployAWSConfig:
    Description: Set to "true" to configure AWS Config. If set to "false", you must give the compliance account to assume the AWS Config service Role, and as well permissions to deploy CloudFormation templates and control Config.
    Default: true
    AllowedValues:
      - true
      - false
    Type: String

Conditions:
  IsMainRegion: !Equals [ !Ref 'AWS::Region', !Ref MainRegion ]
  NotMainRegion: !Not [!Equals [!Ref 'AWS::Region', !Ref MainRegion ]]
  SetConfig: !Equals [ !Ref DeployAWSConfig, 'true']
  NoSetConfig: !Equals [ !Ref DeployAWSConfig, 'false']
  SetConfigMain: !And
      - !Condition IsMainRegion
      - !Condition SetConfig
  SetConfigNotMain: !And
      - !Condition NotMainRegion
      - !Condition SetConfig
  NoSetConfigMain: !And
      - !Condition IsMainRegion
      - !Condition NoSetConfig
  NoSetConfigNotMain: !And
      - !Condition NotMainRegion
      - !Condition NoSetConfig

Resources:
  MainConfigurationRecorder:
    Condition: SetConfigMain
    Type: AWS::Config::ConfigurationRecorder
    Properties:
      RecordingGroup:
        AllSupported: true
        IncludeGlobalResourceTypes: true
      RoleARN: !Join ["", ["arn:aws:iam::", !Ref 'AWS::AccountId', ":role/service-role/", !Ref ConfigAndComplianceAuditRoleName]]
    DependsOn:
    - AWSConfigAndComplianceRole
    - ConfigS3WritePolicy

  NotMainConfigurationRecorder:
    Condition: SetConfigNotMain
    Type: AWS::Config::ConfigurationRecorder
    Properties:
      RecordingGroup:
        AllSupported: true
        IncludeGlobalResourceTypes: false
      RoleARN: !Join ["", ["arn:aws:iam::", !Ref 'AWS::AccountId', ":role/service-role/", !Ref ConfigAndComplianceAuditRoleName]]

  MainDeliveryChannel:
    Condition: SetConfigMain
    Type: AWS::Config::DeliveryChannel
    Properties:
      ConfigSnapshotDeliveryProperties:
        DeliveryFrequency: TwentyFour_Hours
      S3BucketName: !Ref CentralizedS3BucketConfigFullName
    DependsOn:
    - ConfigS3WritePolicy

  NotMainDeliveryChannel:
    Condition: SetConfigNotMain
    Type: AWS::Config::DeliveryChannel
    Properties:
      ConfigSnapshotDeliveryProperties:
        DeliveryFrequency: TwentyFour_Hours
      S3BucketName: !Ref CentralizedS3BucketConfigFullName

  AggregationAuthorization:
    Condition: SetConfig
    Type: "AWS::Config::AggregationAuthorization"
    Properties:
      AuthorizedAccountId: !Ref ComplianceAccountId
      AuthorizedAwsRegion: !Ref 'AWS::Region'

  AWSConfigAndComplianceRole:
    Condition: SetConfigMain
    Type: AWS::IAM::Role
    Properties:
      AssumeRolePolicyDocument:
        Statement:
        - Effect: Allow
          Action:
          - sts:AssumeRole
          Principal:
            Service: config.amazonaws.com
        - Effect: Allow
          Action:
          - sts:AssumeRole
          Principal:
            AWS: !Ref ComplianceAccountId
        Version: '2012-10-17'
      ManagedPolicyArns:
      - 'arn:aws:iam::aws:policy/service-role/AWSConfigRole'
      - 'arn:aws:iam::aws:policy/ReadOnlyAccess'
      Path: /service-role/
      RoleName: !Ref ConfigAndComplianceAuditRoleName

  ConfigS3WritePolicy:
    Condition: SetConfigMain
    Type: 'AWS::IAM::Policy'
    Properties:
      Roles:
      - !Ref ConfigAndComplianceAuditRoleName
      PolicyName: !Join
        - '-'
        - - ConfigS3Write
          - !Ref 'AWS::AccountId'
          - !Ref 'AWS::Region'
      PolicyDocument:
        Statement:
        - Action:
          - s3:PutObject
          Effect: Allow
          Resource:
          - !Join [ "", [ "arn:aws:s3:::", !Ref CentralizedS3BucketConfigFullName, "/AWSLogs/", !Ref 'AWS::AccountId', "/*"] ]
          Sid: !Join ["", ["ConfigS3Write", !Ref 'AWS::AccountId'] ]
        Version: 2012-10-17
    DependsOn:
    - AWSConfigAndComplianceRole

  ConfigDeployPolicy:
    Condition: SetConfigMain
    Type: 'AWS::IAM::Policy'
    Properties:
      Roles:
      - !Ref ConfigAndComplianceAuditRoleName
      PolicyName: !Join
        - '-'
        - - ConfigDeploy
          - !Ref 'AWS::AccountId'
          - !Ref 'AWS::Region'
      PolicyDocument:
        Statement:
        - Action:
          - cloudformation:*
          Effect: Allow
          Resource:
          - !Join [ "", [ "arn:aws:cloudformation:*:", !Ref 'AWS::AccountId', ":stack/Compliance-Engine-Benchmark-DO-NOT-DELETE*" ]]
          Sid: !Join ["", ["ConfigDeployCfn", !Ref 'AWS::AccountId'] ]
        - Action:
          - config:*
          Effect: Allow
          Resource: "*"
          Sid: !Join ["", ["ConfigAccess", !Ref 'AWS::AccountId'] ]
        Version: 2012-10-17
    DependsOn:
    - AWSConfigAndComplianceRole

  MainCaCReporter:
    Condition: SetConfigMain
    Type: AWS::Config::ConfigRule
    Properties:
      ConfigRuleName: !Ref EngineComplianceRule
      Description: Check that the latest Compliance-as-code template is installed in this account.
      Source:
        Owner: CUSTOM_LAMBDA
        SourceIdentifier: !Join [ ":", [ 'arn:aws:lambda', !Ref "AWS::Region", !Ref ComplianceAccountId, 'function', !Ref LambdaFunctionName ] ]
        SourceDetails:
        -
          EventSource: "aws.config"
          MaximumExecutionFrequency: !Ref RuleFrequency
          MessageType: ScheduledNotification
    DependsOn:
    - MainConfigurationRecorder
    - MainDeliveryChannel

  MainCaCReporterNotConfig:
    Condition: NoSetConfigMain
    Type: AWS::Config::ConfigRule
    Properties:
      ConfigRuleName: !Ref EngineComplianceRule
      Description: Check that the latest Compliance-as-code template is installed in this account.
      Source:
        Owner: CUSTOM_LAMBDA
        SourceIdentifier: !Join [ ":", [ 'arn:aws:lambda', !Ref "AWS::Region", !Ref ComplianceAccountId, 'function', !Ref LambdaFunctionName ] ]
        SourceDetails:
        -
          EventSource: "aws.config"
          MaximumExecutionFrequency: !Ref RuleFrequency
          MessageType: ScheduledNotification

  NotMainCaCReporter:
    Condition: SetConfigNotMain
    Type: AWS::Config::ConfigRule
    Properties:
      ConfigRuleName: !Ref EngineComplianceRule
      Description: Check that the latest template for the RuleSet is installed in this account.
      Source:
        Owner: CUSTOM_LAMBDA
        SourceIdentifier: !Join [ ":", [ 'arn:aws:lambda', !Ref "AWS::Region", !Ref ComplianceAccountId, 'function', !Ref LambdaFunctionName ] ]
        SourceDetails:
        -
          EventSource: "aws.config"
          MaximumExecutionFrequency: !Ref RuleFrequency
          MessageType: ScheduledNotification
    DependsOn:
    - NotMainConfigurationRecorder
    - NotMainDeliveryChannel

  NotMainCaCReporterNotConfig:
    Condition: NoSetConfigNotMain
    Type: AWS::Config::ConfigRule
    Properties:
      ConfigRuleName: !Ref EngineComplianceRule
      Description: Check that the latest template for the RuleSet is installed in this account.
      Source:
        Owner: CUSTOM_LAMBDA
        SourceIdentifier: !Join [ ":", [ 'arn:aws:lambda', !Ref "AWS::Region", !Ref ComplianceAccountId, 'function', !Ref LambdaFunctionName ] ]
        SourceDetails:
        -
          EventSource: "aws.config"
          MaximumExecutionFrequency: !Ref RuleFrequency
          MessageType: ScheduledNotification