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RDS CloudFormation Reference by tools-only

Name: RDS CloudFormation Reference
Author: tools-only

RDS CloudFormation Reference

This file contains detailed reference information for Amazon RDS CloudFormation resources.

AWS::RDS::DBInstance
AWS::RDS::DBCluster
AWS::RDS::DBParameterGroup
AWS::RDS::DBClusterParameterGroup
AWS::RDS::DBSubnetGroup
AWS::RDS::DBOptionGroup
AWS::RDS::EventSubscription
Engine Versions and Families
Instance Classes
Common Configuration Options

AWS::RDS::DBInstance

The AWS::RDS::DBInstance resource creates an Amazon RDS DB instance.

Required Properties

Property	Type	Description
DBInstanceClass	String	The compute and memory capacity of the DB instance
Engine	String	The name of the database engine

Optional Properties

Property	Type	Default	Description
AllocatedStorage	Number	-	The allocated storage size in gibibytes (GiB)
AutoMinorVersionUpgrade	Boolean	true	Whether minor version upgrades are applied automatically
AvailabilityZone	String	-	The AZ for the DB instance
BackupRetentionPeriod	Number	1	The number of days to retain automated backups
DBInstanceIdentifier	String	-	The identifier for the DB instance
DBName	String	-	The name of the initial database
DBParameterGroupName	String	-	The parameter group to associate
DBSecurityGroups	List	-	EC2-Classic security groups
DBSubnetGroupName	String	-	The subnet group for the DB instance
DeletionProtection	Boolean	false	Whether deletion protection is enabled
EnableIAMDatabaseAuthentication	Boolean	false	Whether IAM auth is enabled
EnablePerformanceInsights	Boolean	false	Whether Performance Insights is enabled
EngineVersion	String	-	The version number of the database engine
KmsKeyId	String	-	The KMS key for encryption
LicenseModel	String	-	The license model
MasterUsername	String	-	The master username
MasterUserPassword	String	-	The master user password
MonitoringInterval	Number	0	The interval for monitoring
MonitoringRoleArn	String	-	The IAM role for monitoring
MultiAZ	Boolean	false	Whether it's a Multi-AZ deployment
PerformanceInsightsKMSKeyId	String	-	The KMS key for Performance Insights
PerformanceInsightsRetentionPeriod	Number	7	The retention period for PI data
Port	Number	-	The port number
PreferredBackupWindow	String	-	The backup window
PreferredMaintenanceWindow	String	-	The maintenance window
PubliclyAccessible	Boolean	false	Whether it's publicly accessible
SourceDBInstanceIdentifier	String	-	The source DB instance identifier
StorageEncrypted	Boolean	false	Whether storage is encrypted
StorageType	String	gp2	The storage type
Tags	List	-	Tags for the DB instance
VPCSecurityGroups	List	-	VPC security groups

Important Attributes

Attribute	Description
Endpoint.Address	The DNS address of the DB instance
Endpoint.Port	The port number
Endpoint.HostedZoneId	The hosted zone ID
Arn	The ARN of the DB instance
DBInstanceArn	The ARN of the DB instance

Important Notes

MasterUserPassword: Use NoEcho: true to hide the password
StorageEncrypted: Required for Multi-AZ and some instance types
MultiAZ: Creates a standby in a different AZ
DeletionProtection: Prevents accidental deletion, required for production
SourceDBInstanceIdentifier: Use for creating read replicas

Example

Resources:
  MyDBInstance:
    Type: AWS::RDS::DBInstance
    Properties:
      DBInstanceIdentifier: mydbinstance
      DBInstanceClass: db.t3.medium
      Engine: mysql
      EngineVersion: "8.0.35"
      MasterUsername: admin
      MasterUserPassword: !Ref DBPassword
      AllocatedStorage: 100
      StorageType: gp3
      DBSubnetGroupName: !Ref DBSubnetGroup
      VPCSecurityGroups:
        - !Ref DBSecurityGroup
      StorageEncrypted: true
      MultiAZ: true
      BackupRetentionPeriod: 35
      DeletionProtection: true

AWS::RDS::DBCluster

The AWS::RDS::DBCluster resource creates an Amazon Aurora DB cluster.

Required Properties

Property	Type	Description
Engine	String	The name of the database engine

Optional Properties

Property	Type	Default	Description
AssociatedRoles	List	-	IAM roles associated with the cluster
AvailabilityZones	List	-	The Availability Zones
BacktrackWindow	Number	0	The backtrack window
BackupRetentionPeriod	Number	1	The number of days for backups
ClusterIdentifier	String	-	The cluster identifier
DatabaseName	String	-	The name of the initial database
DBClusterInstanceClass	String	-	The compute and memory capacity
DBClusterParameterGroupName	String	-	The cluster parameter group
DBSubnetGroupName	String	-	The subnet group
DeletionProtection	Boolean	false	Whether deletion protection is enabled
EnableCloudwatchLogsExports	List	-	Log types to export
EnableHttpEndpoint	Boolean	false	Whether HTTP endpoint is enabled
EnableIAMDatabaseAuthentication	Boolean	false	Whether IAM auth is enabled
EngineMode	String	-	The engine mode (provisioned or serverless)
EngineVersion	String	-	The engine version
GlobalClusterIdentifier	String	-	The global cluster identifier
KmsKeyId	String	-	The KMS key for encryption
MasterUsername	String	-	The master username
MasterUserPassword	String	-	The master user password
Port	Number	-	The port number
PreferredBackupWindow	String	-	The backup window
PreferredMaintenanceWindow	String	-	The maintenance window
ReplicationSourceIdentifier	String	-	The source for replication
ScalingConfiguration	Map	-	Serverless scaling configuration
StorageEncrypted	Boolean	false	Whether storage is encrypted
Tags	List	-	Tags for the cluster
VPCSecurityGroups	List	-	VPC security groups

Important Attributes

Attribute	Description
Endpoint	The writer endpoint
ReadEndpoint	The reader endpoint
Endpoint.Address	The endpoint address
Endpoint.Port	The port number
Arn	The ARN of the DB cluster

Engine Modes

provisioned: Traditional provisioned capacity
serverless: Auto-scaling capacity
parallelquery: Optimized for analytics
global: Global database (used with GlobalClusterIdentifier)

ScalingConfiguration (Serverless)

ScalingConfiguration:
  AutoPause: true
  MinCapacity: 2
  MaxCapacity: 16
  SecondsUntilAutoPause: 300

Example

Resources:
  MyDBCluster:
    Type: AWS::RDS::DBCluster
    Properties:
      DBClusterIdentifier: my-aurora-cluster
      Engine: aurora-mysql
      EngineVersion: "8.0.mysql_aurora.3.02.0"
      MasterUsername: admin
      MasterUserPassword: !Ref DBPassword
      DatabaseName: mydb
      DBSubnetGroupName: !Ref DBSubnetGroup
      VPCSecurityGroups:
        - !Ref DBSecurityGroup
      StorageEncrypted: true
      EngineMode: provisioned
      Port: 3306
      EnableIAMDatabaseAuthentication: true
      BackupRetentionPeriod: 35
      DeletionProtection: true

  MyDBInstanceWriter:
    Type: AWS::RDS::DBInstance
    Properties:
      DBInstanceIdentifier: my-writer
      DBClusterIdentifier: !Ref MyDBCluster
      Engine: aurora-mysql
      DBInstanceClass: db.r5.large
      PromotionTier: 1

AWS::RDS::DBParameterGroup

The AWS::RDS::DBParameterGroup resource creates a custom parameter group for a DB instance.

Required Properties

Property	Type	Description
Description	String	The description of the parameter group
Family	String	The parameter group family

Optional Properties

Property	Type	Description
DBParameterGroupName	String	The name of the parameter group
Parameters	Map	The parameters to set
Tags	List	Tags for the parameter group

Common Parameters for MySQL

Parameters:
  # Connection settings
  max_connections: 200
  max_user_connections: 200

  # Memory settings
  innodb_buffer_pool_size: 1073741824
  innodb_buffer_pool_instances: 4

  # Query cache (MySQL 5.7 only)
  query_cache_type: 1
  query_cache_size: 268435456

  # Character set
  character_set_server: utf8mb4
  collation_server: utf8mb4_unicode_ci

  # Logging
  slow_query_log: "ON"
  long_query_time: 2
  log_queries_not_using_indexes: "ON"
  log_error_verbosity: 3

  # Timezone
  default_time_zone: "+00:00"

  # Timeout
  wait_timeout: 28800
  interactive_timeout: 28800

Common Parameters for PostgreSQL

Parameters:
  # Connection settings
  max_connections: 200
  superuser_reserved_connections: 3

  # Memory settings
  shared_buffers: 524288
  work_mem: 4096
  maintenance_work_mem: 524288
  effective_cache_size: 1572864

  # Query settings
  log_min_duration_statement: 2000
  log_connections: "ON"
  log_disconnections: "ON"
  log_lock_waits: "ON"

  # Temporary files
  log_temp_files: 0

  # Character set
  client_encoding: UTF8
  server_encoding: UTF8

Example

Resources:
  MyDBParameterGroup:
    Type: AWS::RDS::DBParameterGroup
    Properties:
      Description: MySQL 8.0 parameter group
      Family: mysql8.0
      Parameters:
        max_connections: 200
        innodb_buffer_pool_size: 1073741824
        character_set_server: utf8mb4
        collation_server: utf8mb4_unicode_ci
        slow_query_log: "ON"
        long_query_time: 2

AWS::RDS::DBClusterParameterGroup

The AWS::RDS::DBClusterParameterGroup resource creates a custom parameter group for a DB cluster (Aurora).

Required Properties

Property	Type	Description
Description	String	The description of the parameter group
Family	String	The parameter group family

Optional Properties

Property	Type	Description
DBClusterParameterGroupName	String	The name of the parameter group
Parameters	Map	The parameters to set
Tags	List	Tags for the parameter group

Common Parameters for Aurora MySQL

Parameters:
  # Connection settings
  max_connections: 1000
  max_connections_per_hour: 0

  # Memory settings
  innodb_buffer_pool_size: 2147483648
  innodb_buffer_pool_instances: 4

  # Query cache (Aurora MySQL 5.7 only)
  query_cache_type: 1
  query_cache_size: 268435456

  # Character set
  character_set_server: utf8mb4
  collation_server: utf8mb4_unicode_ci

  # Logging
  slow_query_log: "ON"
  long_query_time: 2

  # Aurora-specific
  aurora_enable_repl_bin_logging: 0
  aurora_use_relay_logs: 1

Common Parameters for Aurora PostgreSQL

Parameters:
  # Connection settings
  max_connections: 1000

  # Memory settings
  shared_buffers: 2097152
  work_mem: 32768
  maintenance_work_mem: 524288
  effective_cache_size: 6291456

  # Logging
  log_min_duration_statement: 2000
  log_connections: "ON"
  log_disconnections: "ON"

  # Aurora-specific
  rds.accepted_password_auth_max_retries: 10

Example

Resources:
  MyDBClusterParameterGroup:
    Type: AWS::RDS::DBClusterParameterGroup
    Properties:
      Description: Aurora MySQL 8.0 parameter group
      Family: aurora-mysql8.0
      Parameters:
        max_connections: 1000
        innodb_buffer_pool_size: 2147483648
        character_set_server: utf8mb4
        collation_server: utf8mb4_unicode_ci
        slow_query_log: "ON"
        long_query_time: 2

AWS::RDS::DBSubnetGroup

The AWS::RDS::DBSubnetGroup resource creates a DB subnet group for a DB instance or cluster.

Required Properties

Property	Type	Description
DBSubnetGroupDescription	String	The description of the subnet group
SubnetIds	List	The IDs of the subnets

Optional Properties

Property	Type	Description
DBSubnetGroupName	String	The name of the subnet group
Tags	List	Tags for the subnet group

Requirements

Must include at least 2 subnets in different Availability Zones
Subnets must be in the same VPC
All subnets must have available IP addresses

Example

Resources:
  MyDBSubnetGroup:
    Type: AWS::RDS::DBSubnetGroup
    Properties:
      DBSubnetGroupDescription: Subnet group for production RDS
      DBSubnetGroupName: production-rds-subnet-group
      SubnetIds:
        - !Ref PrivateSubnet1
        - !Ref PrivateSubnet2
        - !Ref PrivateSubnet3
      Tags:
        - Key: Environment
          Value: production

AWS::RDS::DBOptionGroup

The AWS::RDS::DBOptionGroup resource creates a DB option group for database features.

Required Properties

Property	Type	Description
EngineName	String	The database engine name
MajorEngineVersion	String	The major engine version
OptionGroupDescription	String	The description of the option group

Optional Properties

Property	Type	Description
OptionGroupName	String	The name of the option group
Options	List	The options to configure
Tags	List	Tags for the option group

Options

Oracle Options

Options:
  - OptionName: OEM
    OptionVersion: "19"
    Port: 5500
    VpcSecurityGroupMemberships:
      - !Ref OEMSecurityGroup
    OptionSettings:
      - Name: OMS_HOST
        Value: oms.example.com
      - Name: OMS_PORT
        Value: "9900"

  - OptionName: SSL
    OptionSettings:
      - Name: SQLNET.SSL_VERSION
        Value: "1.2"
      - Name: SQLNET.CIPHER_SUITE
        Value: "SSL_RSA_WITH_AES_256_CBC_SHA"

  - OptionName: APEX
    OptionVersion: "22.1.0"
    OptionSettings:
      - Name: APEX_LISTENER_PORT
        Value: "8080"
      - Name: APEX_WS_PORT
        Value: "8181"

SQL Server Options

Options:
  - OptionName: SQLSERVER_BACKUP
    OptionSettings:
      - Name: BACKUP_RETENTION_PERIOD
        Value: "15"

  - OptionName: SQLSERVER_AUDIT
    OptionSettings:
      - Name: S3_BUCKET_ARN
        Value: !Ref AuditLogBucketArn
      - Name: IAM_ROLE_ARN
        Value: !GetAtt AuditRole.Arn

Example

Resources:
  MyDBOptionGroup:
    Type: AWS::RDS::DBOptionGroup
    Properties:
      EngineName: oracle-ee
      MajorEngineVersion: "19"
      OptionGroupDescription: Oracle 19c option group with OEM
      OptionGroupName: oracle-19c-oem
      Options:
        - OptionName: OEM
          OptionVersion: "19"
          Port: 5500
          VpcSecurityGroupMemberships:
            - !Ref OEMSecurityGroup
        - OptionName: SSL
          OptionSettings:
            - Name: SQLNET.SSL_VERSION
              Value: "1.2"

AWS::RDS::EventSubscription

The AWS::RDS::EventSubscription resource creates an event subscription for RDS events.

Required Properties

Property	Type	Description
SnsTopicArn	String	The ARN of the SNS topic
SourceType	String	The source type (db-instance, db-cluster, etc.)

Optional Properties

Property	Type	Default	Description
Enabled	Boolean	true	Whether the subscription is enabled
EventCategories	List	-	The event categories
SourceIds	List	-	The source identifiers
SubscriptionName	String	-	The name of the subscription

Event Categories

Category	Description
availability	Availability zone issues
backup	Backup operations
configuration change	Configuration changes
creation	Resource creation
deletion	Resource deletion
failover	Failover events
low storage	Storage issues
maintenance	Maintenance events
notification	General notifications
read replica	Read replica events
recovery	Recovery events
restoration	Restoration events

Example

Resources:
  MyEventSubscription:
    Type: AWS::RDS::EventSubscription
    Properties:
      SnsTopicArn: !Ref NotificationTopic
      SourceType: db-instance
      EventCategories:
        - availability
        - backup
        - configuration change
        - deletion
        - failover
        - maintenance
      SourceIds:
        - !Ref MyDBInstance
      Enabled: true

Engine Versions and Families

MySQL

Family	Versions
mysql5.6	5.6.40, 5.6.41, 5.6.42, 5.6.44, 5.6.51
mysql5.7	5.7.26, 5.7.30, 5.7.32, 5.7.33, 5.7.37, 5.7.38, 5.7.39, 5.7.40, 5.7.41, 5.7.42
mysql8.0	8.0.11, 8.0.16, 8.0.17, 8.0.20, 8.0.23, 8.0.25, 8.0.26, 8.0.28, 8.0.32, 8.0.33, 8.0.35

PostgreSQL

Family	Versions
postgres11	11.9, 11.10, 11.11, 11.12, 11.13, 11.14, 11.15, 11.16, 11.17, 11.18, 11.20, 11.21, 11.22
postgres12	12.3, 12.4, 12.5, 12.6, 12.7, 12.8, 12.9, 12.10, 12.11, 12.12, 12.13, 12.14, 12.15, 12.17
postgres13	13.3, 13.4, 13.5, 13.6, 13.7, 13.8, 13.9, 13.10, 13.11, 13.12, 13.13, 13.14, 13.15
postgres14	14.1, 14.2, 14.3, 14.4, 14.5, 14.6, 14.7, 14.8, 14.9, 14.10, 14.11, 14.12, 14.13, 14.14
postgres15	15.1, 15.2, 15.3, 15.4, 15.5, 15.6, 15.7, 15.8
postgres16	16.1, 16.2, 16.3, 16.4

Aurora MySQL

Family	Versions
aurora5.6	5.6.mysql_aurora.1.19.0, 5.6.mysql_aurora.1.19.1, 5.6.mysql_aurora.1.19.2, 5.6.mysql_aurora.1.19.5, 5.6.mysql_aurora.1.22.0, 5.6.mysql_aurora.1.22.1, 5.6.mysql_aurora.1.22.2, 5.6.mysql_aurora.1.22.3, 5.6.mysql_aurora.1.23.0, 5.6.mysql_aurora.1.23.1
aurora-mysql5.7	5.7.mysql_aurora.2.07.0, 5.7.mysql_aurora.2.07.1, 5.7.mysql_aurora.2.07.2, 5.7.mysql_aurora.2.07.3, 5.7.mysql_aurora.2.07.4, 5.7.mysql_aurora.2.07.5, 5.7.mysql_aurora.2.07.6, 5.7.mysql_aurora.2.08.0, 5.7.mysql_aurora.2.09.0, 5.7.mysql_aurora.2.09.1, 5.7.mysql_aurora.2.10.0, 5.7.mysql_aurora.2.10.1, 5.7.mysql_aurora.2.10.2, 5.7.mysql_aurora.2.11.0, 5.7.mysql_aurora.2.11.1, 5.7.mysql_aurora.2.12.0
aurora-mysql8.0	8.0.mysql_aurora.3.01.0, 8.0.mysql_aurora.3.01.1, 8.0.mysql_aurora.3.02.0, 8.0.mysql_aurora.3.02.1, 8.0.mysql_aurora.3.03.0, 8.0.mysql_aurora.3.04.0, 8.0.mysql_aurora.3.05.0

Aurora PostgreSQL

Family	Versions
aurora-postgresql11	11.9, 11.13, 11.14, 11.17, 11.18, 11.19, 11.20, 11.21
aurora-postgresql12	12.4, 12.8, 12.9, 12.10, 12.11, 12.12, 12.13, 12.14
aurora-postgresql13	13.3, 13.4, 13.6, 13.7, 13.8, 13.9, 13.10, 13.11, 13.12, 13.13, 13.14
aurora-postgresql14	14.1, 14.3, 14.4, 14.5, 14.6, 14.7, 14.8, 14.9, 14.10, 14.11, 14.12
aurora-postgresql15	15.2, 15.3, 15.4, 15.5, 15.6, 15.7, 15.8

Instance Classes

General Purpose (Burstable)

Instance Class	vCPU	Memory (GiB)
db.t3.micro	2	1
db.t3.small	2	2
db.t3.medium	2	4
db.t3.large	2	8
db.t3.xlarge	4	16
db.t3.2xlarge	8	32

General Purpose (Provisioned IOPS)

Instance Class	vCPU	Memory (GiB)
db.m5.large	2	8
db.m5.xlarge	4	16
db.m5.2xlarge	8	32
db.m5.4xlarge	16	64
db.m5.8xlarge	32	128
db.m5.12xlarge	48	192
db.m5.16xlarge	64	256
db.m5.24xlarge	96	384

Memory Optimized

Instance Class	vCPU	Memory (GiB)
db.r5.large	2	16
db.r5.xlarge	4	32
db.r5.2xlarge	8	64
db.r5.4xlarge	16	128
db.r5.8xlarge	32	256
db.r5.12xlarge	48	384
db.r5.16xlarge	64	512
db.r5.24xlarge	96	768

Aurora-Specific

Instance Class	vCPU	Memory (GiB)	Use Case
db.t3.medium	2	4	Development/test
db.r5.large	2	16	Production-small
db.r5.xlarge	4	32	Production-medium
db.r5.2xlarge	8	64	Production-large
db.r5.4xlarge	16	128	Production-xlarge
db.r6g.large	2	16	Graviton-small
db.r6g.xlarge	4	32	Graviton-medium
db.r6g.2xlarge	8	64	Graviton-large

Common Configuration Options

Storage Types

Storage Type	Description	Use Case
gp2	General Purpose SSD	Most workloads
gp3	General Purpose SSD (latest)	Cost-effective, flexible IOPS
io1	Provisioned IOPS SSD	I/O-intensive, predictable performance
io2	Provisioned IOPS SSD (newer)	Highest durability, 99.999% SLA

Storage Encryption

StorageEncrypted: true
KmsKeyId: !Ref EncryptionKey

Multi-AZ Deployment

MultiAZ: true

Performance Insights

EnablePerformanceInsights: true
PerformanceInsightsRetentionPeriod: 731  # 2 years
PerformanceInsightsKMSKeyId: !Ref PIKey

Enhanced Monitoring

MonitoringInterval: 60  # seconds
MonitoringRoleArn: !GetAtt MonitoringRole.Arn

CloudWatch Logs Export

EnableCloudwatchLogsExports:
  - audit
  - error
  - general
  - slowquery

IAM Database Authentication

EnableIAMDatabaseAuthentication: true

Deletion Protection

DeletionProtection: true

Automatic Minor Version Upgrades

AutoMinorVersionUpgrade: false  # Disable for production

Backup Settings

BackupRetentionPeriod: 35  # 35 days for production
PreferredBackupWindow: "07:00-09:00"

Maintenance Settings

PreferredMaintenanceWindow: "sun:04:00-sun:05:00"
AutoMinorVersionUpgrade: false

RDS CloudFormation Reference

File contents

RDS CloudFormation Reference

Table of Contents

AWS::RDS::DBInstance

Required Properties

Optional Properties

Important Attributes

Important Notes

Example

AWS::RDS::DBCluster

Required Properties

Optional Properties

Important Attributes

Engine Modes

ScalingConfiguration (Serverless)

Example

AWS::RDS::DBParameterGroup

Required Properties

Optional Properties

Common Parameters for MySQL

Common Parameters for PostgreSQL

Example

AWS::RDS::DBClusterParameterGroup

Required Properties

Optional Properties

Common Parameters for Aurora MySQL

Common Parameters for Aurora PostgreSQL

Example

AWS::RDS::DBSubnetGroup

Required Properties

Optional Properties

Requirements

Example

AWS::RDS::DBOptionGroup

Required Properties

Optional Properties

Options

Oracle Options

SQL Server Options

Example

AWS::RDS::EventSubscription

Required Properties

Optional Properties

Event Categories

Example

Engine Versions and Families

MySQL

PostgreSQL

Aurora MySQL

Aurora PostgreSQL

Instance Classes

General Purpose (Burstable)

General Purpose (Provisioned IOPS)

Memory Optimized

Aurora-Specific

Common Configuration Options

Storage Types

Storage Encryption

Multi-AZ Deployment

Performance Insights

Enhanced Monitoring

CloudWatch Logs Export

IAM Database Authentication

Deletion Protection

Automatic Minor Version Upgrades

Backup Settings

Maintenance Settings

Useful Links

Related skills

Frequently asked questions

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