AWS RDS Terraform module

Terraform module which creates RDS resources on AWS.

Root module calls these modules which can also be used separately to create independent resources:

db_instance - creates RDS DB instance
db_subnet_group - creates RDS DB subnet group
db_parameter_group - creates RDS DB parameter group
db_option_group - creates RDS DB option group

Usage

module "db" {
  source  = "terraform-aws-modules/rds/aws"

  identifier = "demodb"

  engine            = "mysql"
  engine_version    = "5.7"
  instance_class    = "db.t3a.large"
  allocated_storage = 5

  db_name  = "demodb"
  username = "user"
  port     = "3306"

  iam_database_authentication_enabled = true

  vpc_security_group_ids = ["sg-12345678"]

  maintenance_window = "Mon:00:00-Mon:03:00"
  backup_window      = "03:00-06:00"

  # Enhanced Monitoring - see example for details on how to create the role
  # by yourself, in case you don't want to create it automatically
  monitoring_interval = "30"
  monitoring_role_name = "MyRDSMonitoringRole"
  create_monitoring_role = true

  tags = {
    Owner       = "user"
    Environment = "dev"
  }

  # DB subnet group
  create_db_subnet_group = true
  subnet_ids             = ["subnet-12345678", "subnet-87654321"]

  # DB parameter group
  family = "mysql5.7"

  # DB option group
  major_engine_version = "5.7"

  # Database Deletion Protection
  deletion_protection = true

  parameters = [
    {
      name = "character_set_client"
      value = "utf8mb4"
    },
    {
      name = "character_set_server"
      value = "utf8mb4"
    }
  ]

  options = [
    {
      option_name = "MARIADB_AUDIT_PLUGIN"

      option_settings = [
        {
          name  = "SERVER_AUDIT_EVENTS"
          value = "CONNECT"
        },
        {
          name  = "SERVER_AUDIT_FILE_ROTATIONS"
          value = "37"
        },
      ]
    },
  ]
}

Conditional creation

The following values are provided to toggle on/off creation of the associated resources as desired:

module "db" {
  source = "terraform-aws-modules/rds/aws"

  # Disable creation of RDS instance(s)
  create_db_instance = false

  # Disable creation of option group - provide an option group or default AWS default
  create_db_option_group = false

  # Disable creation of parameter group - provide a parameter group or default to AWS default
  create_db_parameter_group = false

  # Enable creation of subnet group (disabled by default)
  create_db_subnet_group = true

  # Enable creation of monitoring IAM role
  create_monitoring_role = true

  # ... omitted
}

Option Groups

Reference

Users have the ability to:

Create an option group with the name provided:

  option_group_name            = "prod-instance-mysql-8.0"
  option_group_use_name_prefix = false

Create an option group using a unique prefix beginning with the name provided:

  option_group_name = "prod-instance-mysql-8.0"

Pass the name of an option group to use that has been created outside of the module:

  create_db_option_group = false
  option_group_name      = "prod-instance-mysql-8.0" # must already exist in AWS

Skip creating an option group for PostgreSQL entirely as that is not supported

  engine            = "postgres"
  option_group_name = "prod-instance-postgresql-11.0" # this will be ignored, no option group created

Use a default option group provided by AWS

  create_db_option_group = false

Parameter Groups

Reference

Users have the ability to:

Create a parameter group with the name provided:

  parameter_group_name            = "prod-instance-mysql-8.0"
  parameter_group_use_name_prefix = false

Create a parameter group using a unique prefix beginning with the name provided:

  parameter_group_name = "prod-instance-mysql-8.0"

Pass the name of a parameter group to use that has been created outside of the module:

  create_db_parameter_group = false
  parameter_group_name   = "prod-instance-mysql-8.0" # must already exist in AWS

Use a default parameter group provided by AWS

  create_db_parameter_group = false

Examples

Notes

This module does not create RDS security group. Use terraform-aws-security-group module for this.
By default, the variable create_random_password is set to true. Therefore, even if the user provides a password, it will not be read. The create_random_password variable should be set to false and the password variable should have a non-null value to be read and used.
For an RDS instance with storage_type using gp3, be aware that iops and storage_throughput cannot be specified if the allocated_storage value is below a per-engine threshold. See the RDS User Guide for details.

Requirements

Name	Version
terraform	>= 1.0
aws	>= 4.45
random	>= 3.1

Providers

Name	Version
random	>= 3.1

Modules

Name	Source	Version
db_instance	./modules/db_instance	n/a
db_option_group	./modules/db_option_group	n/a
db_parameter_group	./modules/db_parameter_group	n/a
db_subnet_group	./modules/db_subnet_group	n/a

Resources

Name	Type
random_password.master_password	resource

Inputs

Name	Description	Type	Default	Required
allocated_storage	The allocated storage in gigabytes	`string`	`null`	no
allow_major_version_upgrade	Indicates that major version upgrades are allowed. Changing this parameter does not result in an outage and the change is asynchronously applied as soon as possible	`bool`	`false`	no
apply_immediately	Specifies whether any database modifications are applied immediately, or during the next maintenance window	`bool`	`false`	no
auto_minor_version_upgrade	Indicates that minor engine upgrades will be applied automatically to the DB instance during the maintenance window	`bool`	`true`	no
availability_zone	The Availability Zone of the RDS instance	`string`	`null`	no
backup_retention_period	The days to retain backups for	`number`	`null`	no
backup_window	The daily time range (in UTC) during which automated backups are created if they are enabled. Example: '09:46-10:16'. Must not overlap with maintenance_window	`string`	`null`	no
blue_green_update	Enables low-downtime updates using RDS Blue/Green deployments.	`map(string)`	`{}`	no
ca_cert_identifier	Specifies the identifier of the CA certificate for the DB instance	`string`	`null`	no
character_set_name	The character set name to use for DB encoding in Oracle instances. This can't be changed. See Oracle Character Sets Supported in Amazon RDS and Collations and Character Sets for Microsoft SQL Server for more information. This can only be set on creation	`string`	`null`	no
cloudwatch_log_group_kms_key_id	The ARN of the KMS Key to use when encrypting log data	`string`	`null`	no
cloudwatch_log_group_retention_in_days	The number of days to retain CloudWatch logs for the DB instance	`number`	`7`	no
copy_tags_to_snapshot	On delete, copy all Instance tags to the final snapshot	`bool`	`false`	no
create_cloudwatch_log_group	Determines whether a CloudWatch log group is created for each `enabled_cloudwatch_logs_exports`	`bool`	`false`	no
create_db_instance	Whether to create a database instance	`bool`	`true`	no
create_db_option_group	Create a database option group	`bool`	`true`	no
create_db_parameter_group	Whether to create a database parameter group	`bool`	`true`	no
create_db_subnet_group	Whether to create a database subnet group	`bool`	`false`	no
create_monitoring_role	Create IAM role with a defined name that permits RDS to send enhanced monitoring metrics to CloudWatch Logs	`bool`	`false`	no
create_random_password	Whether to create random password for RDS primary cluster	`bool`	`true`	no
db_instance_tags	Additional tags for the DB instance	`map(string)`	`{}`	no
db_name	The DB name to create. If omitted, no database is created initially	`string`	`null`	no
db_option_group_tags	Additional tags for the DB option group	`map(string)`	`{}`	no
db_parameter_group_tags	Additional tags for the DB parameter group	`map(string)`	`{}`	no
db_subnet_group_description	Description of the DB subnet group to create	`string`	`null`	no
db_subnet_group_name	Name of DB subnet group. DB instance will be created in the VPC associated with the DB subnet group. If unspecified, will be created in the default VPC	`string`	`null`	no
db_subnet_group_tags	Additional tags for the DB subnet group	`map(string)`	`{}`	no
db_subnet_group_use_name_prefix	Determines whether to use `subnet_group_name` as is or create a unique name beginning with the `subnet_group_name` as the prefix	`bool`	`true`	no
delete_automated_backups	Specifies whether to remove automated backups immediately after the DB instance is deleted	`bool`	`true`	no
deletion_protection	The database can't be deleted when this value is set to true	`bool`	`false`	no
domain	The ID of the Directory Service Active Directory domain to create the instance in	`string`	`null`	no
domain_iam_role_name	(Required if domain is provided) The name of the IAM role to be used when making API calls to the Directory Service	`string`	`null`	no
enabled_cloudwatch_logs_exports	List of log types to enable for exporting to CloudWatch logs. If omitted, no logs will be exported. Valid values (depending on engine): alert, audit, error, general, listener, slowquery, trace, postgresql (PostgreSQL), upgrade (PostgreSQL)	`list(string)`	`[]`	no
engine	The database engine to use	`string`	`null`	no
engine_version	The engine version to use	`string`	`null`	no
family	The family of the DB parameter group	`string`	`null`	no
final_snapshot_identifier_prefix	The name which is prefixed to the final snapshot on cluster destroy	`string`	`"final"`	no
iam_database_authentication_enabled	Specifies whether or not the mappings of AWS Identity and Access Management (IAM) accounts to database accounts are enabled	`bool`	`false`	no
identifier	The name of the RDS instance	`string`	n/a	yes
instance_class	The instance type of the RDS instance	`string`	`null`	no
instance_use_identifier_prefix	Determines whether to use `identifier` as is or create a unique identifier beginning with `identifier` as the specified prefix	`bool`	`false`	no
iops	The amount of provisioned IOPS. Setting this implies a storage_type of 'io1' or `gp3`. See `notes` for limitations regarding this variable for `gp3`	`number`	`null`	no
kms_key_id	The ARN for the KMS encryption key. If creating an encrypted replica, set this to the destination KMS ARN. If storage_encrypted is set to true and kms_key_id is not specified the default KMS key created in your account will be used. Be sure to use the full ARN, not a key alias.	`string`	`null`	no
license_model	License model information for this DB instance. Optional, but required for some DB engines, i.e. Oracle SE1	`string`	`null`	no
maintenance_window	The window to perform maintenance in. Syntax: 'ddd:hh24:mi-ddd:hh24:mi'. Eg: 'Mon:00:00-Mon:03:00'	`string`	`null`	no
major_engine_version	Specifies the major version of the engine that this option group should be associated with	`string`	`null`	no
max_allocated_storage	Specifies the value for Storage Autoscaling	`number`	`0`	no
monitoring_interval	The interval, in seconds, between points when Enhanced Monitoring metrics are collected for the DB instance. To disable collecting Enhanced Monitoring metrics, specify 0. The default is 0. Valid Values: 0, 1, 5, 10, 15, 30, 60	`number`	`0`	no
monitoring_role_arn	The ARN for the IAM role that permits RDS to send enhanced monitoring metrics to CloudWatch Logs. Must be specified if monitoring_interval is non-zero	`string`	`null`	no
monitoring_role_description	Description of the monitoring IAM role	`string`	`null`	no
monitoring_role_name	Name of the IAM role which will be created when create_monitoring_role is enabled	`string`	`"rds-monitoring-role"`	no
monitoring_role_use_name_prefix	Determines whether to use `monitoring_role_name` as is or create a unique identifier beginning with `monitoring_role_name` as the specified prefix	`bool`	`false`	no
multi_az	Specifies if the RDS instance is multi-AZ	`bool`	`false`	no
network_type	The type of network stack to use	`string`	`null`	no
option_group_description	The description of the option group	`string`	`null`	no
option_group_name	Name of the option group	`string`	`null`	no
option_group_timeouts	Define maximum timeout for deletion of `aws_db_option_group` resource	`map(string)`	`{}`	no
option_group_use_name_prefix	Determines whether to use `option_group_name` as is or create a unique name beginning with the `option_group_name` as the prefix	`bool`	`true`	no
options	A list of Options to apply	`any`	`[]`	no
parameter_group_description	Description of the DB parameter group to create	`string`	`null`	no
parameter_group_name	Name of the DB parameter group to associate or create	`string`	`null`	no
parameter_group_use_name_prefix	Determines whether to use `parameter_group_name` as is or create a unique name beginning with the `parameter_group_name` as the prefix	`bool`	`true`	no
parameters	A list of DB parameters (map) to apply	`list(map(string))`	`[]`	no
password	Password for the master DB user. Note that this may show up in logs, and it will be stored in the state file. The password provided will not be used if the variable create_random_password is set to true.	`string`	`null`	no
performance_insights_enabled	Specifies whether Performance Insights are enabled	`bool`	`false`	no
performance_insights_kms_key_id	The ARN for the KMS key to encrypt Performance Insights data	`string`	`null`	no
performance_insights_retention_period	The amount of time in days to retain Performance Insights data. Valid values are `7`, `731` (2 years) or a multiple of `31`	`number`	`7`	no
port	The port on which the DB accepts connections	`string`	`null`	no
publicly_accessible	Bool to control if instance is publicly accessible	`bool`	`false`	no
putin_khuylo	Do you agree that Putin doesn't respect Ukrainian sovereignty and territorial integrity? More info: https://en.wikipedia.org/wiki/Putin_khuylo!	`bool`	`true`	no
random_password_length	Length of random password to create	`number`	`16`	no
replica_mode	Specifies whether the replica is in either mounted or open-read-only mode. This attribute is only supported by Oracle instances. Oracle replicas operate in open-read-only mode unless otherwise specified	`string`	`null`	no
replicate_source_db	Specifies that this resource is a Replicate database, and to use this value as the source database. This correlates to the identifier of another Amazon RDS Database to replicate	`string`	`null`	no
restore_to_point_in_time	Restore to a point in time (MySQL is NOT supported)	`map(string)`	`null`	no
s3_import	Restore from a Percona Xtrabackup in S3 (only MySQL is supported)	`map(string)`	`null`	no
skip_final_snapshot	Determines whether a final DB snapshot is created before the DB instance is deleted. If true is specified, no DBSnapshot is created. If false is specified, a DB snapshot is created before the DB instance is deleted	`bool`	`false`	no
snapshot_identifier	Specifies whether or not to create this database from a snapshot. This correlates to the snapshot ID you'd find in the RDS console, e.g: rds:production-2015-06-26-06-05	`string`	`null`	no
storage_encrypted	Specifies whether the DB instance is encrypted	`bool`	`true`	no
storage_throughput	Storage throughput value for the DB instance. See `notes` for limitations regarding this variable for `gp3`	`number`	`null`	no
storage_type	One of 'standard' (magnetic), 'gp2' (general purpose SSD), 'gp3' (new generation of general purpose SSD), or 'io1' (provisioned IOPS SSD). The default is 'io1' if iops is specified, 'gp2' if not. If you specify 'io1' or 'gp3' , you must also include a value for the 'iops' parameter	`string`	`null`	no
subnet_ids	A list of VPC subnet IDs	`list(string)`	`[]`	no
tags	A mapping of tags to assign to all resources	`map(string)`	`{}`	no
timeouts	Updated Terraform resource management timeouts. Applies to `aws_db_instance` in particular to permit resource management times	`map(string)`	`{}`	no
timezone	Time zone of the DB instance. timezone is currently only supported by Microsoft SQL Server. The timezone can only be set on creation. See MSSQL User Guide for more information	`string`	`null`	no
username	Username for the master DB user	`string`	`null`	no
vpc_security_group_ids	List of VPC security groups to associate	`list(string)`	`[]`	no

Outputs

Name	Description
db_instance_address	The address of the RDS instance
db_instance_arn	The ARN of the RDS instance
db_instance_availability_zone	The availability zone of the RDS instance
db_instance_ca_cert_identifier	Specifies the identifier of the CA certificate for the DB instance
db_instance_cloudwatch_log_groups	Map of CloudWatch log groups created and their attributes
db_instance_domain	The ID of the Directory Service Active Directory domain the instance is joined to
db_instance_domain_iam_role_name	The name of the IAM role to be used when making API calls to the Directory Service.
db_instance_endpoint	The connection endpoint
db_instance_engine	The database engine
db_instance_engine_version_actual	The running version of the database
db_instance_hosted_zone_id	The canonical hosted zone ID of the DB instance (to be used in a Route 53 Alias record)
db_instance_id	The RDS instance ID
db_instance_name	The database name
db_instance_password	The database password (this password may be old, because Terraform doesn't track it after initial creation)
db_instance_port	The database port
db_instance_resource_id	The RDS Resource ID of this instance
db_instance_status	The RDS instance status
db_instance_username	The master username for the database
db_option_group_arn	The ARN of the db option group
db_option_group_id	The db option group id
db_parameter_group_arn	The ARN of the db parameter group
db_parameter_group_id	The db parameter group id
db_subnet_group_arn	The ARN of the db subnet group
db_subnet_group_id	The db subnet group name
enhanced_monitoring_iam_role_arn	The Amazon Resource Name (ARN) specifying the monitoring role
enhanced_monitoring_iam_role_name	The name of the monitoring role

Authors

Module is maintained by Anton Babenko with help from these awesome contributors.

License

Apache 2 Licensed. See LICENSE for full details.

Additional information for users from Russia and Belarus

Russia has illegally annexed Crimea in 2014 and brought the war in Donbas followed by full-scale invasion of Ukraine in 2022.
Russia has brought sorrow and devastations to millions of Ukrainians, killed hundreds of innocent people, damaged thousands of buildings, and forced several million people to flee.
Putin khuylo!

bathomas/terraform-aws-rds