AWSTemplateFormatVersion: '2010-09-09'
Description: "Amazon RDS PostgreSQL, Do Not Remove Apache License Version 2.0 (qs-1u8fagclk) May,31,2023"
Metadata:
  LICENSE: Apache License Version 2.0
  cfn-lint:
    config:
      ignore_checks:
        - E9101
        - W3011
  AWS::CloudFormation::Interface:
    ParameterGroups:
    - Label:
        default: Database Network configuration
      Parameters:
      - VPCID
      - Subnet1ID
      - Subnet2ID
      - Subnet3ID
      - CustomDBSecurityGroup
      - DBAccessCIDR
      - PubliclyAccessible
    - Label:
        default: Database General configuration
      Parameters:
      - DBEngineVersion
      - DBInstanceClass
      - DBPort
      - DBName
      - DBMasterUsername
      - ManageMasterUserPassword
      - DBMasterUserPassword
      - DBMultiAZ
      - DBMultiAZCluster
      - DBAutoMinorVersionUpgrade
      - DBBackupRetentionPeriod
      - EnableIAMDBAuth
    - Label:
        default: Database Storage configuration
      Parameters:
      - DBStorageType
      - DBAllocatedStorage
      - DBAllocatedStorageEncrypted
      - StorageIOPS
      - StorageThroughput
    - Label:
        default: Database Monitoring configuration
      Parameters:
      - DBExportLogToCloudwatch
      - EnablePerformanceInsights
      - PerformanceInsightsRetentionPeriod
      - EnableEnhancedMonitoring
      - MonitoringInterval
      - EnableEventSubscription  
      - NotificationList
    - Label:
        default: Database tags (optional)
      Parameters:
      - EnvironmentStage
      - Application
      - ApplicationVersion
      - ProjectCostCenter
      - Confidentiality
      - Compliance
    ParameterLabels:
      Application:
        default: Application name
      ApplicationVersion:
        default: Application version
      Compliance:
        default: Compliance classifier
      Confidentiality:
       default: Confidentiality classifier
      CustomDBSecurityGroup:
        default: Custom security group ID
      DBAccessCIDR:
        default: Database connection CIDR
      DBAllocatedStorage:
        default: Database allocated storage size in GiB
      DBAllocatedStorageEncrypted:
        default: Database encryption enabled
      DBAutoMinorVersionUpgrade:
        default: Database auto minor version upgrade
      DBBackupRetentionPeriod:
        default: Database backup retention period
      DBEngineVersion:
        default: Database Engine Version
      DBExportLogToCloudwatch:
        default: Export Database Log to CloudWatch  
      DBInstanceClass:
        default: Database instance class
      DBMasterUsername:
        default: Database master username
      DBMasterUserPassword:
        default: Database master password
      DBMultiAZ:
        default: RDS Multi-AZ DB Instance deployment
      DBMultiAZCluster:
        default: RDS Multi-AZ DB Cluster deployment
      DBName:
        default: Database name
      DBPort:
        default: Database port
      DBStorageType:
        default: Database storage type
      EnableEnhancedMonitoring:
        default: Enable Enhanced Monitoring
      EnableEventSubscription:
        default: Enable Event Subscription
      EnableIAMDBAuth:
        default: Enable IAM Database Authentication
      EnablePerformanceInsights:
        default: Enable RDS Performance Insights
      EnvironmentStage:
        default: Environment stage
      ManageMasterUserPassword:
        default: Manage DB master user password with AWS Secrets Manager
      MonitoringInterval:
        default: Enhanced monitoring interval
      NotificationList:
        default: SNS notification email
      PerformanceInsightsRetentionPeriod:
        default:  Number of days to retain Performance Insights data      
      ProjectCostCenter:
       default: Project cost center
      PubliclyAccessible:
       default: Publicly Accessible
      StorageIOPS:
        default: Provisioned IOPS for gp3/io1 storage type
      StorageThroughput:
        default: Provisioned Throughput for gp3 storage type in MiBps
      Subnet1ID:
        default: Private subnet 1 ID
      Subnet2ID:
        default: Private subnet 2 ID
      Subnet3ID:
        default: Private subnet 3 ID
      VPCID:
        default: VPC ID      
      
Mappings:
  DBFamilyMap:
    '10.17':
      family: postgres10
    '10.18':
      family: postgres10
    '10.19':
      family: postgres10
    '10.20':
      family: postgres10
    '10.21':
      family: postgres10
    '10.22':
      family: postgres10
    '10.23':
      family: postgres10
    '11.12':
      family: postgres11
    '11.13':
      family: postgres11
    '11.14':
      family: postgres11
    '11.15':
      family: postgres11
    '11.16':
      family: postgres11
    '11.17':
      family: postgres11
    '11.18':
      family: postgres11
    '11.19':
      family: postgres11
    '12.7':
      family: postgres12
    '12.8':
      family: postgres12
    '12.9':
      family: postgres12
    '12.10':
      family: postgres12
    '12.11':
      family: postgres12
    '12.12':
      family: postgres12
    '12.13':
      family: postgres12
    '12.14':
      family: postgres12
    '13.3':
      family: postgres13
    '13.4':
      family: postgres13
    '13.5':
      family: postgres13
    '13.6':
      family: postgres13
    '13.7':
      family: postgres13
    '13.8':
      family: postgres13
    '13.9':
      family: postgres13
    '13.10':
      family: postgres13
    '14.1':
      family: postgres14
    '14.2':
      family: postgres14
    '14.3':
      family: postgres14
    '14.4':
      family: postgres14
    '14.5':
      family: postgres14
    '14.6':
      family: postgres14
    '14.7':
      family: postgres14
    '15.2':
      family: postgres15
  
Conditions:
  CreateSecurityGroup: !Equals
    - !Ref CustomDBSecurityGroup
    - ''
  CreateKMSKey: !Or
    - !Condition UseDatabaseEncryption
    - !Condition UseSecretsManager
    - !Condition EnablePI
  DoCreateDatabase:
    !Not
      - !Equals
        - !Ref DBName
        - ''
  EnableDBLogExport: !Equals
    - !Ref DBExportLogToCloudwatch
    - "true"
  isDBCluster: !Equals 
    - !Ref DBMultiAZCluster
    - 'true' 
  isDBInstance: !Not [!Condition isDBCluster]
  EventSubscription: !Equals
    - !Ref EnableEventSubscription
    - 'true'
  EventSubscriptionDBCluster: !And
    - !Condition EventSubscription
    - !Condition isDBCluster
  EventSubscriptionDBInstance: !And
    - !Condition EventSubscription
    - !Condition isDBInstance
  EnableEM: !Equals
    - !Ref EnableEnhancedMonitoring
    - 'true'
  EnablePI: !Equals
    - !Ref EnablePerformanceInsights
    - 'true'
  isGP2: !Equals 
    - !Ref DBStorageType
    - 'gp2'
  isGP3: !Equals 
    - !Ref DBStorageType
    - 'gp3'
  UseDatabaseEncryption: !Equals
    - !Ref DBAllocatedStorageEncrypted
    - "true"
  UseSecretsManager: !Equals
    - !Ref ManageMasterUserPassword
    - "true"
  NAStorageIOPS: !Equals
    - !Ref StorageIOPS
    - '0'
  NAStorageThrougput: !Equals
    - !Ref StorageThroughput
    - '0'

Rules:
  SubnetsInVPC:
    Assertions:
      - Assert: !Equals [!ValueOf ["Subnet1ID", "VpcId"], !Ref VPCID]
        AssertDescription: "Private subnet 1 ID doesn't belong to the specified VPC"
      - Assert: !Equals [!ValueOf ["Subnet2ID", "VpcId"], !Ref VPCID]
        AssertDescription: "Private subnet 2 ID doesn't belong to the specified VPC"
      - Assert: !Equals [!ValueOf ["Subnet3ID", "VpcId"], !Ref VPCID]
        AssertDescription: "Private subnet 3 ID doesn't belong to the specified VPC"
  SubnetsUnique:
    Assertions:
      - Assert: !Not [!Equals [!Ref Subnet1ID, !Ref Subnet2ID]]
        AssertDescription: "Please provide 3 distinct private subnets"
      - Assert: !Not [!Equals [!Ref Subnet1ID, !Ref Subnet3ID]]
        AssertDescription: "Please provide 3 distinct private subnets"
      - Assert: !Not [!Equals [!Ref Subnet2ID, !Ref Subnet3ID]]
        AssertDescription: "Please provide 3 distinct private subnets"
  IOPSForIO1:
    Assertions:
      - Assert: !Or [!Not [!Equals [!Ref DBStorageType, 'io1']], !Not [!Equals [!Ref StorageIOPS, '0']]]
        AssertDescription: "For io1 storage type, you must specify provisioned IOPS"

Outputs:
  DBName:
    Condition: DoCreateDatabase
    Description: "Amazon RDS database name"
    Value: !Ref DBName
  DBMasterUsername:
    Description: "Amazon RDS database master username"
    Value: !Ref DBMasterUsername
  MasterUserSecret:
    Condition: UseSecretsManager
    Description: "Master Credentials ARN"
    Value: !If [isDBCluster, !Sub "${MAZDBC.MasterUserSecret.SecretArn}", !Sub "${MAZDBI.MasterUserSecret.SecretArn}"]
  RDSEndPointAddress:
    Description: "Amazon RDS write endpoint"
    Value: !If [isDBCluster, !Sub "${MAZDBC.Endpoint.Address}", !Sub "${MAZDBI.Endpoint.Address}"]
  RDSReadEndPointAddress:
    Condition: isDBCluster
    Description: "Amazon RDS read endpoint"
    Value: !Sub ${MAZDBC.ReadEndpoint.Address}
  RDSEndPointPort:
    Description: "Amazon RDS port"
    Value: !If [isDBCluster, !Sub "${MAZDBC.Endpoint.Port}", !Sub "${MAZDBI.Endpoint.Port}"]
  RDSMAZInstEndPoints:
    Condition: isDBInstance
    Description: "Full Amazon RDS write endpoint"
    Value: !If [DoCreateDatabase, !Sub "${MAZDBI.Endpoint.Address}:${MAZDBI.Endpoint.Port}/${DBName}", !Sub "${MAZDBI.Endpoint.Address}:${MAZDBI.Endpoint.Port}/postgres"]
  RDSMAZClustEndPoints:
    Condition: isDBCluster
    Description: "Full Amazon RDS write endpoint"
    Value: !If [DoCreateDatabase, !Sub "${MAZDBC.Endpoint.Address}:${MAZDBC.Endpoint.Port}/${DBName}", !Sub "${MAZDBC.Endpoint.Address}:${MAZDBC.Endpoint.Port}/postgres"]
  RDSEncryptionKey:
    Condition: UseDatabaseEncryption
    Description: The alias of the encryption key created for RDS
    Value: !Ref EncryptionKeyAlias

Parameters:
  Application:
    Type: String
    Default: ''
    Description: Designates the application of the associated AWS resource. (Optional)
  ApplicationVersion:
    Type: String
    Description: Designates the specific version of the application. (Optional)
    Default: ''
  Compliance:
    Type: String
    Default: ''
    Description: Designates the compliance level for the AWS resource. (Optional)
    AllowedValues:
      - hipaa
      - sox
      - fips
      - other
      - ''
  Confidentiality:
    Type: String
    Default: ''
    Description: Designates the confidentiality classification of the data that is associated with the resource. (Optional)
    AllowedValues:
      - public
      - private
      - confidential
      - pii/phi
      - ''
  CustomDBSecurityGroup:
    Description: "ID of the security group (e.g., sg-0234se). One will be created for you if left empty."
    Type: String
    Default: ''
  DBAccessCIDR:
    AllowedPattern: "^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])(\\/([0-9]|[1-2][0-9]|3[0-2]))$"
    ConstraintDescription: "CIDR block parameter must be in the form x.x.x.x/x"
    Description: "Allowed CIDR block for external access (use VPC CIDR)."
    Type: String
    Default: 10.0.0.0/16
  DBAllocatedStorage:
    Default: 100
    Description: Allocated storage size in GiB. For gp2 and gp3, must be an integer from 20 to 65536. For io1, must be an integer from 100 to 65536.
    Type: Number
    MinValue: 20
    MaxValue: 65536
    ConstraintDescription: Must be an integer from 20 to 65536 for gp2/gp3 and 100 to 65536 for io1.
  DBAllocatedStorageEncrypted:
    Default: "true"
    AllowedValues:
      - "true"
      - "false"
    Description: Whether or not to encrypt the database.
    Type: String
  DBAutoMinorVersionUpgrade:
    AllowedValues:
      - "true"
      - "false"
    Default: "true"
    Description: "Select true to set up auto minor version upgrade."
    Type: String
  DBBackupRetentionPeriod:
    Default: 35
    Description: "The number of days for which automatic database snapshots are retained."
    Type: Number
    MinValue: 0
    MaxValue: 35
  DBEngineVersion:
    Description: Select Database Engine Version
    Type: String
    Default: 15.2
    AllowedValues:
      - 10.17
      - 10.18
      - 10.19
      - 10.20
      - 10.21
      - 10.22
      - 10.23
      - 11.12
      - 11.13
      - 11.14
      - 11.15
      - 11.16
      - 11.17
      - 11.18
      - 11.19
      - 12.7
      - 12.8
      - 12.9
      - 12.10
      - 12.11
      - 12.12
      - 12.13
      - 12.14
      - 13.3
      - 13.4
      - 13.5
      - 13.6
      - 13.7
      - 13.8
      - 13.9
      - 13.10
      - 14.1
      - 14.2
      - 14.3
      - 14.4
      - 14.5
      - 14.6
      - 14.7
      - 15.2
  DBExportLogToCloudwatch:
    Default: "true"
    AllowedValues:
      - "true"
      - "false"
    Description: Whether or not to export Database logs to CloudWatch
    Type: String
  DBInstanceClass:
    Default: db.r5.large
    Description: >-
      The database instance type. 
      Please see supported instance types for the PostgreSQL version selected https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/Concepts.DBInstanceClass.html.
      For RDS Multi-AZ cluster supported instance class, please refer https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/create-multi-az-db-cluster.html#create-multi-az-db-cluster-settings.
    Type: String
    AllowedValues:
      - db.m5.12xlarge
      - db.m5.16xlarge
      - db.m5.24xlarge
      - db.m5.2xlarge
      - db.m5.4xlarge
      - db.m5.8xlarge
      - db.m5.large
      - db.m5.xlarge
      - db.m5d.12xlarge
      - db.m5d.16xlarge
      - db.m5d.24xlarge
      - db.m5d.2xlarge
      - db.m5d.4xlarge
      - db.m5d.8xlarge
      - db.m5d.large
      - db.m5d.xlarge
      - db.m6g.12xlarge
      - db.m6g.16xlarge
      - db.m6g.2xlarge
      - db.m6g.4xlarge
      - db.m6g.8xlarge
      - db.m6g.large
      - db.m6g.xlarge
      - db.m6gd.12xlarge
      - db.m6gd.16xlarge
      - db.m6gd.2xlarge
      - db.m6gd.4xlarge
      - db.m6gd.8xlarge
      - db.m6gd.large
      - db.m6gd.xlarge
      - db.m6i.12xlarge
      - db.m6i.16xlarge
      - db.m6i.24xlarge
      - db.m6i.2xlarge
      - db.m6i.32xlarge
      - db.m6i.4xlarge
      - db.m6i.8xlarge
      - db.m6i.large
      - db.m6i.xlarge
      - db.r5.12xlarge
      - db.r5.16xlarge
      - db.r5.24xlarge
      - db.r5.2xlarge
      - db.r5.4xlarge
      - db.r5.8xlarge
      - db.r5.large
      - db.r5.xlarge
      - db.r5b.12xlarge
      - db.r5b.16xlarge
      - db.r5b.24xlarge
      - db.r5b.2xlarge
      - db.r5b.4xlarge
      - db.r5b.8xlarge
      - db.r5b.large
      - db.r5b.xlarge
      - db.r5d.12xlarge
      - db.r5d.16xlarge
      - db.r5d.24xlarge
      - db.r5d.2xlarge
      - db.r5d.4xlarge
      - db.r5d.8xlarge
      - db.r5d.large
      - db.r5d.xlarge
      - db.r6g.12xlarge
      - db.r6g.16xlarge
      - db.r6g.2xlarge
      - db.r6g.4xlarge
      - db.r6g.8xlarge
      - db.r6g.large
      - db.r6g.xlarge
      - db.r6gd.12xlarge
      - db.r6gd.16xlarge
      - db.r6gd.2xlarge
      - db.r6gd.4xlarge
      - db.r6gd.8xlarge
      - db.r6gd.large
      - db.r6gd.xlarge
      - db.r6i.12xlarge
      - db.r6i.16xlarge
      - db.r6i.24xlarge
      - db.r6i.2xlarge
      - db.r6i.32xlarge
      - db.r6i.4xlarge
      - db.r6i.8xlarge
      - db.r6i.large
      - db.r6i.xlarge
      - db.t3.2xlarge
      - db.t3.large
      - db.t3.medium
      - db.t3.micro
      - db.t3.small
      - db.t3.xlarge
      - db.t4g.2xlarge
      - db.t4g.large
      - db.t4g.medium
      - db.t4g.micro
      - db.t4g.small
      - db.t4g.xlarge
      - db.x2g.12xlarge
      - db.x2g.16xlarge
      - db.x2g.2xlarge
      - db.x2g.4xlarge
      - db.x2g.8xlarge
      - db.x2g.large
      - db.x2g.xlarge
      - db.x2iedn.16xlarge
      - db.x2iedn.24xlarge
      - db.x2iedn.2xlarge
      - db.x2iedn.32xlarge
      - db.x2iedn.4xlarge
      - db.x2iedn.8xlarge
      - db.x2iedn.xlarge
  DBMasterUsername:
    AllowedPattern: "[a-zA-Z][a-zA-Z0-9]*"
    ConstraintDescription: "Must begin with a letter and contain only alphanumeric characters."
    Default: pgadmin
    Description: "The database master username."
    MaxLength: "16"
    MinLength: "1"
    Type: String
  DBMasterUserPassword:
    AllowedPattern: >-
      ^(?=^.{8,255}$)(?=.*[a-z])(?=.*[A-Z])(?=.*\d)((?=.*[^A-Za-z0-9])(?!.*[@/"'])).*$
    ConstraintDescription: >-
      Min 8 chars. Must include 1 uppercase, 1 lowercase, 1 number, 1 (non / @ " ') symbol
    Default: "Gjht56Ft$"
    Description: The database master user password. Required if "Manage DB master user password with AWS Secrets Manager" option is set to false.
    MaxLength: "64"
    MinLength: "8"
    NoEcho: "True"
    Type: String
  DBMultiAZ:
    AllowedValues:
      - "true"
      - "false"
    Default: "false"
    Description: "Select true to deploy a RDS Multi-AZ DB instance."
    Type: String
  DBMultiAZCluster:
    Description: "Select true to deploy a RDS Multi-AZ DB cluster with two readable standbys."
    Type: String
    Default: "false"
    AllowedValues:
        - "true"
        - "false"
  DBName:
    AllowedPattern: "[a-zA-Z0-9]*"
    Description: "Name of the initial PostgreSQL database to create."
    MaxLength: "64"
    MinLength: "0"
    Default: 'sampleapp'
    Type: String
  DBPort:
    Default: 5432
    Description: "The port the instance will listen for connections on."
    Type: Number
    ConstraintDescription: 'Must be in the range [1150-65535].'
    MinValue: 1150
    MaxValue: 65535
  DBStorageType:
    Default: io1
    Description: Select the EBS storage type for the RDS PostgreSQL database. RDS Multi-AZ DB Cluster deployment only supports io1 storage type.
    Type: String
    AllowedValues:
      - gp2
      - gp3
      - io1
  EnableEnhancedMonitoring:
    AllowedValues:
      - "true"
      - "false"
    Default: "true"
    Description: "Enables RDS Performance Insights"
    Type: String
  EnableEventSubscription:
    AllowedValues:
      - "true"
      - "false"
    Default: "true"
    Description: "Enables event subscription to Notification List"
    Type: String
  EnableIAMDBAuth:
    AllowedValues:
      - "true"
      - "false"
    Default: "true"
    Description: "Enables IAM Database Authentication"
    Type: String
  EnablePerformanceInsights:
    AllowedValues:
      - "true"
      - "false"
    Default: "true"
    Description: "Enables RDS Performance Insights"
    Type: String
  EnvironmentStage:
    Type: String
    Description: Designates the environment stage of the associated AWS resource. (Optional)
    AllowedValues:
      - dev
      - test
      - pre-prod
      - prod
      - none
    Default: none
  ManageMasterUserPassword:
    AllowedValues:
      - "true"
      - "false"
    Default: "true"
    Description: "Set to true to manage the master user password with AWS Secrets Manager."
    Type: String
  MonitoringInterval:
    Default: 10
    Description: "The interval, in seconds, between points when Enhanced Monitoring metrics are collected for the database."
    Type: Number
    AllowedValues:
      - 1
      - 5
      - 10
      - 15
      - 30
      - 60
    ConstraintDescription: Valid values are 0, 1, 5, 10, 15, 30, 60 seconds.
  NotificationList:
    Type: String
    Default: 'db-ops@domain.com'
    Description: The email notification used to configure an SNS topic for sending CloudWatch alarm and RDS event notifications.
    AllowedPattern: '^(([^<>()\[\]\\.,;:\s@"]+(\.[^<>()\[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$'
    ConstraintDescription: Provide a valid email address.
  PerformanceInsightsRetentionPeriod:
    Default: 7
    Description: "The number of days for which automatic database snapshots are retained. Specify days based on (month * 31), where month is a number of months from 1-23"
    Type: Number
    MinValue: 7
    MaxValue: 713
  ProjectCostCenter:
    Type: String
    Default: ''
    Description: Designates the cost center associated with the project of the given AWS resource. (Optional) 
  PubliclyAccessible:
    AllowedValues:
      - "true"
      - "false"
    Default: "false"
    Description: "Indicates whether the DB instance is an internet-facing instance"
    Type: String
  StorageIOPS:
    Default: '0'
    Description: >-
      If you choose gp3 (and allocate >= 400 GiB) or io1, you must specify provisioned IOPS. Leave at default value otherwise.
      For io1, the ratio of provisioned IOPS to allocated storage (in GiB) must be from 0.5 to 50.
      For gp3, the maximum ratio of provisioned IOPS to allocated storage (in GiB) is 500.
      For details, refer https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/CHAP_Storage.html
    Type: String
  StorageThroughput:
    Default: '0'
    Description: >-
      Provisioned throughput in MiBps. 
      If you choose gp3 (and allocate >= 400 GiB) as storage type, you must specify provisioned throughput. Leave at default value otherwise.
      The maximum ratio of provisioned storage throughput (in MiBps) to IOPS is 0.25.
      For details, refer https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/CHAP_Storage.html
    Type: String
  Subnet1ID:
    Description: The ID of the private subnet in Availability Zone 1.
    Type: 'AWS::EC2::Subnet::Id'
  Subnet2ID:
    Description: The ID of the private subnet in Availability Zone 2.
    Type: 'AWS::EC2::Subnet::Id'
  Subnet3ID:
    Description: The ID of the private subnet in Availability Zone 3.
    Type: 'AWS::EC2::Subnet::Id'
  VPCID:
    Description: "ID of the VPC you are deploying RDS into (e.g., vpc-0343606e)."
    Type: 'AWS::EC2::VPC::Id'
    Default: ''

Resources:
  
  RDSDBSubnetGroup:
    Properties:
      DBSubnetGroupDescription: "Subnets available for the Amazon RDS database instance"
      SubnetIds:
       - !Ref Subnet1ID
       - !Ref Subnet2ID
       - !Ref Subnet3ID
    Type: "AWS::RDS::DBSubnetGroup"
  
  RDSSecurityGroup:
    Condition: CreateSecurityGroup
    Properties:
      GroupDescription: "Allow access to database port"
      SecurityGroupEgress:
        -
          CidrIp: 0.0.0.0/0
          FromPort: -1
          IpProtocol: '-1'
          ToPort: -1
      SecurityGroupIngress:
        -
          CidrIp: !Ref DBAccessCIDR
          FromPort: !Ref DBPort
          IpProtocol: tcp
          ToPort: !Ref DBPort
      VpcId: !Ref VPCID
      Tags:
      - Key: Name
        Value: !Sub RDSSecurityGroup-${AWS::StackName}
    Type: "AWS::EC2::SecurityGroup"
  
  RDSSecurityGroupIngress:
    Condition: CreateSecurityGroup
    Properties:
      GroupId: !GetAtt 'RDSSecurityGroup.GroupId'
      IpProtocol: '-1'
      SourceSecurityGroupId: !Ref RDSSecurityGroup
      Description: 'Self Reference'
    Type: 'AWS::EC2::SecurityGroupIngress'
  
  DBSNSTopic:
    Type: AWS::SNS::Topic
    Properties:
      Subscription:
      - Endpoint: !Ref NotificationList
        Protocol: email
  
  EncryptionKey:
    Metadata:
      cfn-lint:
        config:
          ignore_checks:
            - EIAMPolicyActionWildcard
          ignore_reasons:
            - EIAMPolicyActionWildcard: "All KMS actions allowed by design"
    DeletionPolicy: Retain
    Type: AWS::KMS::Key
    Condition: CreateKMSKey
    Properties:
      EnableKeyRotation: true
      KeyPolicy:
        Version: 2012-10-17
        Id: !Ref AWS::StackName
        Statement:
          - Effect: Allow
            Principal:
              AWS:
                - !Sub "arn:${AWS::Partition}:iam::${AWS::AccountId}:root"
            Action: 'kms:*'
            Resource: '*'
      Tags:
        - Key: Name
          Value: !Ref AWS::StackName
  
  EncryptionKeyAlias:
    Type: AWS::KMS::Alias
    Condition: CreateKMSKey
    Properties:
      AliasName: !Sub "alias/${AWS::StackName}"
      TargetKeyId: !Ref EncryptionKey
  
  MRole:
    Type: AWS::IAM::Role
    Condition: EnableEM
    Properties:
      AssumeRolePolicyDocument:
        Version: "2012-10-17"
        Statement:
          -
            Effect: "Allow"
            Principal:
              Service:
                - "monitoring.rds.amazonaws.com"
            Action:
              - "sts:AssumeRole"
      Path: "/"
      ManagedPolicyArns:
        - !Sub arn:${AWS::Partition}:iam::aws:policy/service-role/AmazonRDSEnhancedMonitoringRole

  RDSDBPG:
    Type: AWS::RDS::DBParameterGroup
    Condition: isDBInstance
    Properties:
      Description: !Join [ "- ", [ "RDS PG Database Instance Parameter Group for Cloudformation Stack ", !Ref AWS::StackName ] ]
      Family: !FindInMap [DBFamilyMap, !Ref DBEngineVersion, "family"]
      Parameters:
        log_rotation_age: '1440'
        log_rotation_size: '102400'
  
  RDSDBCPG:
    Type: AWS::RDS::DBClusterParameterGroup
    Condition: isDBCluster
    Properties:
      Description: !Join [ "- ", [ "RDS PG Cluster Parameter Group for Cloudformation Stack ", !Ref AWS::StackName ] ]
      Family: !FindInMap [DBFamilyMap, !Ref DBEngineVersion, "family"]
      Parameters:
        log_rotation_age: '1440'
        log_rotation_size: '102400'
  
  MAZDBI:
    Type: "AWS::RDS::DBInstance"
    Condition: isDBInstance
    DeletionPolicy: Snapshot
    UpdateReplacePolicy: Snapshot
    Properties:
      AllocatedStorage: !Ref DBAllocatedStorage
      AutoMinorVersionUpgrade: !Ref DBAutoMinorVersionUpgrade
      BackupRetentionPeriod: !Ref DBBackupRetentionPeriod
      DBName:
        !If
        - DoCreateDatabase
        - !Ref DBName
        - !Ref AWS::NoValue
      DBInstanceClass: !Ref DBInstanceClass
      DBParameterGroupName: !Ref RDSDBPG
      DBSubnetGroupName: !Ref RDSDBSubnetGroup
      EnableCloudwatchLogsExports:
        - !If [EnableDBLogExport, postgresql, !Ref 'AWS::NoValue']
      EnableIAMDatabaseAuthentication: !Ref EnableIAMDBAuth
      EnablePerformanceInsights: !Ref EnablePerformanceInsights
      Engine: postgres
      EngineVersion: !Ref DBEngineVersion
      #IOPS property is only valid for io1 and gp2 (>=400GB)
      Iops: !If [isGP2, !Ref "AWS::NoValue", !If [NAStorageIOPS, !Ref 'AWS::NoValue', !Ref StorageIOPS]]
      KmsKeyId: !If [UseDatabaseEncryption, !GetAtt EncryptionKey.Arn, !Ref 'AWS::NoValue']
      MasterUsername: !Ref DBMasterUsername
      ManageMasterUserPassword: !Ref ManageMasterUserPassword
      MasterUserPassword: !If [UseSecretsManager, !Ref 'AWS::NoValue', !Ref DBMasterUserPassword]
      MasterUserSecret:
        KmsKeyId: !If [UseSecretsManager, !Ref EncryptionKey, !Ref 'AWS::NoValue']
      MonitoringInterval: !If [EnableEM, !Ref MonitoringInterval, !Ref 'AWS::NoValue']
      MonitoringRoleArn: !If [EnableEM, !GetAtt MRole.Arn, !Ref 'AWS::NoValue']
      MultiAZ: !Ref DBMultiAZ
      PerformanceInsightsKMSKeyId: !If [EnablePI, !Ref EncryptionKey, !Ref 'AWS::NoValue']
      PerformanceInsightsRetentionPeriod: !If [EnablePI, !Ref PerformanceInsightsRetentionPeriod, !Ref 'AWS::NoValue']
      Port: !Ref DBPort
      PubliclyAccessible: !Ref PubliclyAccessible
      StorageType: !Ref DBStorageType  
      StorageEncrypted: !If [UseDatabaseEncryption, !Ref DBAllocatedStorageEncrypted, !Ref 'AWS::NoValue']
      #StorageThroughput property is only valid for gp3 (>=400GB)
      StorageThroughput: !If [isGP3, !If [NAStorageThrougput, !Ref "AWS::NoValue", !Ref StorageThroughput], !Ref "AWS::NoValue"]
      Tags:
        -
          Key: Name
          Value: !Sub MAZDBI-${AWS::StackName}
        -
          Key: EnvironmentStage
          Value: !Ref EnvironmentStage
        -
          Key: Application
          Value: !Ref Application
        -
          Key: ApplicationVersion
          Value: !Ref ApplicationVersion
        -
          Key: ProjectCostCenter
          Value: !Ref ProjectCostCenter
        -
          Key: Confidentiality
          Value: !Ref Confidentiality
        -
          Key: Compliance
          Value: !Ref Compliance
      VPCSecurityGroups:
        !If
          - CreateSecurityGroup
          - [!Ref RDSSecurityGroup]
          - [!Ref CustomDBSecurityGroup] 
  
  MAZDBC:
    Metadata:
      cfn-lint:
        config:
          ignore_checks:
            - ERDSStorageEncryptionEnabled
          ignore_reasons:
            - ERDSStorageEncryptionEnabled: "StorageEncryption is conditional"
    Type: "AWS::RDS::DBCluster"
    Condition: isDBCluster
    DeletionPolicy: Snapshot
    UpdateReplacePolicy: Snapshot
    Properties:
      AllocatedStorage: !Ref DBAllocatedStorage
      AutoMinorVersionUpgrade: !Ref DBAutoMinorVersionUpgrade
      BackupRetentionPeriod: !Ref DBBackupRetentionPeriod
      DBClusterIdentifier: !Sub rdsmazc-${AWS::StackName}
      DBClusterInstanceClass: !Ref DBInstanceClass
      DBClusterParameterGroupName: !Ref RDSDBCPG
      DBSubnetGroupName: !Ref RDSDBSubnetGroup
      DatabaseName:
        !If
        - DoCreateDatabase
        - !Ref DBName
        - !Ref AWS::NoValue
      EnableCloudwatchLogsExports:
        - !If [EnableDBLogExport, postgresql, !Ref 'AWS::NoValue']
      # IAM DB authentication currently not supported for RDS Multi AZ DB Cluster
      # EnableIAMDatabaseAuthentication: !Ref EnableIAMDBAuth
      Engine: postgres
      EngineVersion: !Ref DBEngineVersion
      Iops: !Ref StorageIOPS
      KmsKeyId: !If [UseDatabaseEncryption, !GetAtt EncryptionKey.Arn, !Ref 'AWS::NoValue']
      MasterUsername: !Ref DBMasterUsername
      ManageMasterUserPassword: !Ref ManageMasterUserPassword
      MasterUserPassword: !If [UseSecretsManager, !Ref 'AWS::NoValue', !Ref DBMasterUserPassword]
      MasterUserSecret:
        KmsKeyId: !If [UseSecretsManager, !Ref EncryptionKey, !Ref 'AWS::NoValue']
      MonitoringInterval: !If [EnableEM, !Ref MonitoringInterval, !Ref 'AWS::NoValue']
      MonitoringRoleArn: !If [EnableEM, !GetAtt MRole.Arn, !Ref 'AWS::NoValue']
      PerformanceInsightsEnabled: !Ref EnablePerformanceInsights
      PerformanceInsightsKmsKeyId: !If [EnablePI, !Ref EncryptionKey, !Ref 'AWS::NoValue']
      PerformanceInsightsRetentionPeriod: !If [EnablePI, !Ref PerformanceInsightsRetentionPeriod, !Ref 'AWS::NoValue']
      Port: !Ref DBPort
      PubliclyAccessible: !Ref PubliclyAccessible
      StorageEncrypted: !If [UseDatabaseEncryption, !Ref DBAllocatedStorageEncrypted, !Ref 'AWS::NoValue']
      StorageType: io1
      Tags:
        -
          Key: Name
          Value: !Sub MAZDBC-${AWS::StackName}
        -
          Key: EnvironmentStage
          Value: !Ref EnvironmentStage
        -
          Key: Application
          Value: !Ref Application
        -
          Key: ApplicationVersion
          Value: !Ref ApplicationVersion
        -
          Key: ProjectCostCenter
          Value: !Ref ProjectCostCenter
        -
          Key: Confidentiality
          Value: !Ref Confidentiality
        -
          Key: Compliance
          Value: !Ref Compliance
      VpcSecurityGroupIds:
        !If
          - CreateSecurityGroup
          - [!Ref RDSSecurityGroup]
          - [!Ref CustomDBSecurityGroup]
  
  CPUUtilizationAlarm1:
    Type: "AWS::CloudWatch::Alarm"
    Properties:
      ActionsEnabled: true
      AlarmActions:
      - Ref: DBSNSTopic
      AlarmDescription: 'CPU_Utilization'
      Dimensions:
      - Name: DBInstanceIdentifier
        Value:
          !If [isDBInstance, !Ref MAZDBI, !Sub '${MAZDBC}-instance-1']
      MetricName: CPUUtilization
      Statistic: Maximum
      Namespace: 'AWS/RDS'
      Threshold: 80
      Unit: Percent
      ComparisonOperator: 'GreaterThanOrEqualToThreshold'
      Period: 60
      EvaluationPeriods: 5
      TreatMissingData: 'notBreaching'

  CPUUtilizationAlarm2:
    Type: "AWS::CloudWatch::Alarm"
    Condition: isDBCluster
    Properties:
      ActionsEnabled: true
      AlarmActions:
      - Ref: DBSNSTopic
      AlarmDescription: 'CPU_Utilization'
      Dimensions:
      - Name: DBInstanceIdentifier
        Value:
          !Sub '${MAZDBC}-instance-2'
      MetricName: CPUUtilization
      Statistic: Maximum
      Namespace: 'AWS/RDS'
      Threshold: 80
      Unit: Percent
      ComparisonOperator: 'GreaterThanOrEqualToThreshold'
      Period: 60
      EvaluationPeriods: 5
      TreatMissingData: 'notBreaching'

  CPUUtilizationAlarm3:
    Type: "AWS::CloudWatch::Alarm"
    Condition: isDBCluster
    Properties:
      ActionsEnabled: true
      AlarmActions:
      - Ref: DBSNSTopic
      AlarmDescription: 'CPU_Utilization'
      Dimensions:
      - Name: DBInstanceIdentifier
        Value:
          !Sub '${MAZDBC}-instance-3'
      MetricName: CPUUtilization
      Statistic: Maximum
      Namespace: 'AWS/RDS'
      Threshold: 80
      Unit: Percent
      ComparisonOperator: 'GreaterThanOrEqualToThreshold'
      Period: 60
      EvaluationPeriods: 5
      TreatMissingData: 'notBreaching'

  MaxUsedTxIDsAlarm1:
    Type: "AWS::CloudWatch::Alarm"
    Properties:
      ActionsEnabled: true
      AlarmActions:
      - Ref: DBSNSTopic
      AlarmDescription: 'Maximum Used Transaction IDs'
      Dimensions:
      - Name: DBInstanceIdentifier
        Value:
          !If [isDBInstance, !Ref MAZDBI, !Sub '${MAZDBC}-instance-1']
      MetricName: 'MaximumUsedTransactionIDs'
      Statistic: Average
      Namespace: 'AWS/RDS'
      Threshold: 600000000
      Unit: Count
      ComparisonOperator: 'GreaterThanOrEqualToThreshold'
      Period: 60
      EvaluationPeriods: 5
      TreatMissingData: 'notBreaching'

  DatabaseClusterEventSubscription:
    Condition: EventSubscriptionDBCluster
    Type: 'AWS::RDS::EventSubscription'
    Properties:
      EventCategories:
      - creation
      - failover
      - notification
      SnsTopicArn: !Ref DBSNSTopic
      SourceIds: [!Ref MAZDBC]
      SourceType: 'db-cluster'
  
  DatabaseInstanceEventSubscription:
    Condition: EventSubscription
    Type: 'AWS::RDS::EventSubscription'
    Properties:
      EventCategories:
      - availability
      - backup
      - configuration change
      - creation
      - deletion
      - failover
      - failure
      - low storage
      - maintenance
      - notification
      - read replica
      - recovery
      - security patching
      SnsTopicArn: !Ref DBSNSTopic
      SourceIds:
      - !If [isDBCluster, !Sub '${MAZDBC}-instance-1', !Ref MAZDBI]
      - !If [isDBCluster, !Sub '${MAZDBC}-instance-2', !Ref "AWS::NoValue"]
      - !If [isDBCluster, !Sub '${MAZDBC}-instance-3', !Ref "AWS::NoValue"]
      SourceType: 'db-instance'
  
  DBParameterGroupEventSubscription:
    Condition: EventSubscriptionDBInstance
    Type: 'AWS::RDS::EventSubscription'
    Properties:
      EventCategories:
      - "configuration change"
      SnsTopicArn: !Ref DBSNSTopic
      SourceIds:
      - !Ref RDSDBPG
      SourceType: 'db-parameter-group'