Terraform module to provision AWS RDS
instances
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Example of running
atmos
to manage infrastructure from our Quick Start tutorial.
The module will create:
- DB instance (MySQL, Postgres, SQL Server, Oracle)
- DB Option Group (will create a new one or you may use an existing)
- DB Parameter Group
- DB Subnet Group
- DB Security Group
- DNS Record in Route53 for the DB endpoint
module "rds_instance" {
source = "cloudposse/rds/aws"
# Cloud Posse recommends pinning every module to a specific version
# version = "x.x.x"
namespace = "eg"
stage = "prod"
name = "app"
dns_zone_id = "Z89FN1IW975KPE"
host_name = "db"
security_group_ids = ["sg-xxxxxxxx"]
ca_cert_identifier = "rds-ca-2019"
allowed_cidr_blocks = ["XXX.XXX.XXX.XXX/32"]
database_name = "wordpress"
database_user = "admin"
database_password = "xxxxxxxxxxxx"
database_port = 3306
multi_az = true
storage_type = "gp2"
allocated_storage = 100
storage_encrypted = true
engine = "mysql"
engine_version = "5.7.17"
major_engine_version = "5.7"
instance_class = "db.t2.medium"
db_parameter_group = "mysql5.7"
option_group_name = "mysql-options"
publicly_accessible = false
subnet_ids = ["sb-xxxxxxxxx", "sb-xxxxxxxxx"]
vpc_id = "vpc-xxxxxxxx"
snapshot_identifier = "rds:production-2015-06-26-06-05"
auto_minor_version_upgrade = true
allow_major_version_upgrade = false
apply_immediately = false
maintenance_window = "Mon:03:00-Mon:04:00"
skip_final_snapshot = false
copy_tags_to_snapshot = true
backup_retention_period = 7
backup_window = "22:00-03:00"
db_parameter = [
{ name = "myisam_sort_buffer_size" value = "1048576" },
{ name = "sort_buffer_size" value = "2097152" }
]
db_options = [
{ option_name = "MARIADB_AUDIT_PLUGIN"
option_settings = [
{ name = "SERVER_AUDIT_EVENTS" value = "CONNECT" },
{ name = "SERVER_AUDIT_FILE_ROTATIONS" value = "37" }
]
}
]
}
If you wish to create the database in a specific character set you can use one of the following options depending on your database engine of choice.
For Oracle and Microsoft SQL you can specify charset name as an input variable to this module. For example, for Microsoft SQL, you could use:
module "rds_instance" {
...
charset_name = "Korean_Wansung_CI_AS"
...
}
For mysql
and mariadb
engines character set of the database can be defined via db_parameter
. In this example
the database is created with utf8mb4
(character set) and utf8mb4_unicode_ci (collation):
module "rds_instance" {
...
db_parameter = [
{
name = "character_set_server"
value = "utf8mb4"
apply_method = "immediate"
},
{
name = "collation_server"
value = "utf8mb4_unicode_ci"
apply_method = "immediate"
}
]
...
}
Important
In Cloud Posse's examples, we avoid pinning modules to specific versions to prevent discrepancies between the documentation and the latest released versions. However, for your own projects, we strongly advise pinning each module to the exact version you're using. This practice ensures the stability of your infrastructure. Additionally, we recommend implementing a systematic approach for updating versions to avoid unexpected changes.
Available targets:
help Help screen
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help/short This help short screen
lint Lint terraform code
Name | Version |
---|---|
terraform | >= 1.3 |
aws | >= 5.0 |
Name | Version |
---|---|
aws | >= 5.0 |
Name | Source | Version |
---|---|---|
dns_host_name | cloudposse/route53-cluster-hostname/aws | 0.12.2 |
final_snapshot_label | cloudposse/label/null | 0.25.0 |
this | cloudposse/label/null | 0.25.0 |
Name | Type |
---|---|
aws_db_instance.default | resource |
aws_db_option_group.default | resource |
aws_db_parameter_group.default | resource |
aws_db_subnet_group.default | resource |
aws_security_group.default | resource |
aws_security_group_rule.egress | resource |
aws_security_group_rule.ingress_cidr_blocks | resource |
aws_security_group_rule.ingress_security_groups | resource |
Name | Description | Type | Default | Required |
---|---|---|---|---|
additional_tag_map | Additional key-value pairs to add to each map in tags_as_list_of_maps . Not added to tags or id .This is for some rare cases where resources want additional configuration of tags and therefore take a list of maps with tag key, value, and additional configuration. |
map(string) |
{} |
no |
allocated_storage | The allocated storage in GBs. Required unless a snapshot_identifier or replicate_source_db is provided. |
number |
null |
no |
allow_major_version_upgrade | Allow major version upgrade | bool |
false |
no |
allowed_cidr_blocks | The whitelisted CIDRs which to allow ingress traffic to the DB instance |
list(string) |
[] |
no |
apply_immediately | Specifies whether any database modifications are applied immediately, or during the next maintenance window | bool |
false |
no |
associate_security_group_ids | The IDs of the existing security groups to associate with the DB instance | list(string) |
[] |
no |
attributes | ID element. Additional attributes (e.g. workers or cluster ) to add to id ,in the order they appear in the list. New attributes are appended to the end of the list. The elements of the list are joined by the delimiter and treated as a single ID element. |
list(string) |
[] |
no |
auto_minor_version_upgrade | Allow automated minor version upgrade (e.g. from Postgres 9.5.3 to Postgres 9.5.4) | bool |
true |
no |
availability_zone | The AZ for the RDS instance. Specify one of subnet_ids , db_subnet_group_name or availability_zone . If availability_zone is provided, the instance will be placed into the default VPC or EC2 Classic |
string |
null |
no |
backup_retention_period | Backup retention period in days. Must be > 0 to enable backups | number |
0 |
no |
backup_window | When AWS can perform DB snapshots, can't overlap with maintenance window | string |
"22:00-03:00" |
no |
ca_cert_identifier | The identifier of the CA certificate for the DB instance | string |
null |
no |
charset_name | The character set name to use for DB encoding. Oracle & Microsoft SQL only. For other engines use db_parameter |
string |
null |
no |
context | Single object for setting entire context at once. See description of individual variables for details. Leave string and numeric variables as null to use default value.Individual variable settings (non-null) override settings in context object, except for attributes, tags, and additional_tag_map, which are merged. |
any |
{ |
no |
copy_tags_to_snapshot | Copy tags from DB to a snapshot | bool |
true |
no |
database_manage_master_user_password | Set to true to allow RDS to manage the master user password in Secrets Manager. Ignore if database_password is provided. |
bool |
false |
no |
database_master_user_secret_kms_key_id | The Amazon Web Services KMS key identifier is the key ARN, key ID, alias ARN, or alias name for the KMS key. To use a KMS key in a different Amazon Web Services account, specify the key ARN or alias ARN. If not specified, the default KMS key for your Amazon Web Services account is used. | string |
null |
no |
database_name | The name of the database to create when the DB instance is created | string |
null |
no |
database_password | Password for the primary DB user. Required unless a snapshot_identifier or replicate_source_db is provided. |
string |
null |
no |
database_port | Database port (_e.g._ 3306 for MySQL ). Used in the DB Security Group to allow access to the DB instance from the provided security_group_ids |
number |
n/a | yes |
database_user | Username for the primary DB user. Required unless a snapshot_identifier or replicate_source_db is provided. |
string |
null |
no |
db_options | A list of DB options to apply with an option group. Depends on DB engine | list(object({ |
[] |
no |
db_parameter | A list of DB parameters to apply. Note that parameters may differ from a DB family to another | list(object({ |
[] |
no |
db_parameter_group | The DB parameter group family name. The value depends on DB engine used. See DBParameterGroupFamily for instructions on how to retrieve applicable value. | string |
n/a | yes |
db_subnet_group_name | Name of DB subnet group. DB instance will be created in the VPC associated with the DB subnet group. Specify one of subnet_ids , db_subnet_group_name or availability_zone |
string |
null |
no |
deletion_protection | Set to true to enable deletion protection on the RDS instance | bool |
false |
no |
delimiter | Delimiter to be used between ID elements. Defaults to - (hyphen). Set to "" to use no delimiter at all. |
string |
null |
no |
descriptor_formats | Describe additional descriptors to be output in the descriptors output map.Map of maps. Keys are names of descriptors. Values are maps of the form {<br> format = string<br> labels = list(string)<br>} (Type is any so the map values can later be enhanced to provide additional options.)format is a Terraform format string to be passed to the format() function.labels is a list of labels, in order, to pass to format() function.Label values will be normalized before being passed to format() so they will beidentical to how they appear in id .Default is {} (descriptors output will be empty). |
any |
{} |
no |
dns_zone_id | The ID of the DNS Zone in Route53 where a new DNS record will be created for the DB host name | string |
"" |
no |
enabled | Set to false to prevent the module from creating any resources | bool |
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 | Database engine type. Required unless a snapshot_identifier or replicate_source_db is provided. |
string |
null |
no |
engine_version | Database engine version, depends on engine type. | string |
n/a | yes |
environment | ID element. Usually used for region e.g. 'uw2', 'us-west-2', OR role 'prod', 'staging', 'dev', 'UAT' | string |
null |
no |
final_snapshot_identifier | Final snapshot identifier e.g.: some-db-final-snapshot-2019-06-26-06-05 | string |
"" |
no |
host_name | The DB host name created in Route53 | string |
"db" |
no |
iam_database_authentication_enabled | Specifies whether or mappings of AWS Identity and Access Management (IAM) accounts to database accounts is enabled | bool |
false |
no |
id_length_limit | Limit id to this many characters (minimum 6).Set to 0 for unlimited length.Set to null for keep the existing setting, which defaults to 0 .Does not affect id_full . |
number |
null |
no |
instance_class | Class of RDS instance | string |
n/a | yes |
iops | The amount of provisioned IOPS, only valid for certain values of storage_type. | number |
null |
no |
kms_key_arn | The ARN of the existing KMS key to encrypt storage | string |
"" |
no |
label_key_case | Controls the letter case of the tags keys (label names) for tags generated by this module.Does not affect keys of tags passed in via the tags input.Possible values: lower , title , upper .Default value: title . |
string |
null |
no |
label_order | The order in which the labels (ID elements) appear in the id .Defaults to ["namespace", "environment", "stage", "name", "attributes"]. You can omit any of the 6 labels ("tenant" is the 6th), but at least one must be present. |
list(string) |
null |
no |
label_value_case | Controls the letter case of ID elements (labels) as included in id ,set as tag values, and output by this module individually. Does not affect values of tags passed in via the tags input.Possible values: lower , title , upper and none (no transformation).Set this to title and set delimiter to "" to yield Pascal Case IDs.Default value: lower . |
string |
null |
no |
labels_as_tags | Set of labels (ID elements) to include as tags in the tags output.Default is to include all labels. Tags with empty values will not be included in the tags output.Set to [] to suppress all generated tags.Notes: The value of the name tag, if included, will be the id , not the name .Unlike other null-label inputs, the initial setting of labels_as_tags cannot bechanged in later chained modules. Attempts to change it will be silently ignored. |
set(string) |
[ |
no |
license_model | License model for this DB. Optional, but required for some DB Engines. Valid values: license-included | bring-your-own-license | general-public-license | string |
"" |
no |
maintenance_window | The window to perform maintenance in. Syntax: 'ddd:hh24:mi-ddd:hh24:mi' UTC | string |
"Mon:03:00-Mon:04:00" |
no |
major_engine_version | Database MAJOR engine version, depends on engine type | string |
"" |
no |
max_allocated_storage | The upper limit to which RDS can automatically scale the storage in GBs | 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. Valid Values are 0, 1, 5, 10, 15, 30, 60. | string |
"0" |
no |
monitoring_role_arn | The ARN for the IAM role that permits RDS to send enhanced monitoring metrics to CloudWatch Logs | string |
null |
no |
multi_az | Set to true if multi AZ deployment must be supported | bool |
false |
no |
name | ID element. Usually the component or solution name, e.g. 'app' or 'jenkins'. This is the only ID element not also included as a tag .The "name" tag is set to the full id string. There is no tag with the value of the name input. |
string |
null |
no |
namespace | ID element. Usually an abbreviation of your organization name, e.g. 'eg' or 'cp', to help ensure generated IDs are globally unique | string |
null |
no |
option_group_name | Name of the DB option group to associate | string |
"" |
no |
parameter_group_name | Name of the DB parameter group to associate | string |
"" |
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. Once KMS key is set, it can never be changed. | string |
null |
no |
performance_insights_retention_period | The amount of time in days to retain Performance Insights data. Either 7 (7 days) or 731 (2 years). | number |
7 |
no |
publicly_accessible | Determines if database can be publicly available (NOT recommended) | bool |
false |
no |
regex_replace_chars | Terraform regular expression (regex) string. Characters matching the regex will be removed from the ID elements. If not set, "/[^a-zA-Z0-9-]/" is used to remove all characters other than hyphens, letters and digits. |
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 (if replicating within a single region) or ARN of the Amazon RDS Database to replicate (if replicating cross-region). Note that if you are creating a cross-region replica of an encrypted database you will also need to specify a kms_key_id . See DB Instance Replication and Working with PostgreSQL and MySQL Read Replicas for more information on using Replication. |
string |
null |
no |
restore_to_point_in_time | An object specifying the restore point in time for the DB instance to restore from. Only used when snapshot_identifier is not provided. |
object({ |
null |
no |
security_group_ids | The IDs of the security groups from which to allow ingress traffic to the DB instance |
list(string) |
[] |
no |
skip_final_snapshot | If true (default), no snapshot will be made before deleting DB | bool |
true |
no |
snapshot_identifier | Snapshot identifier e.g: rds:production-2019-06-26-06-05 for automated or manual-backup-2023-11-16 for manual. If specified, the module create the instance from the snapshot. |
string |
null |
no |
stage | ID element. Usually used to indicate role, e.g. 'prod', 'staging', 'source', 'build', 'test', 'deploy', 'release' | string |
null |
no |
storage_encrypted | (Optional) Specifies whether the DB instance is encrypted. The default is false if not specified | bool |
true |
no |
storage_throughput | The storage throughput value for the DB instance. Can only be set when storage_type is gp3 . Cannot be specified if the allocated_storage value is below a per-engine threshold. |
number |
null |
no |
storage_type | One of 'standard' (magnetic), 'gp2' (general purpose SSD), 'gp3' (general purpose SSD), or 'io1' (provisioned IOPS SSD) | string |
"standard" |
no |
subnet_ids | List of subnet IDs for the DB. DB instance will be created in the VPC associated with the DB subnet group provisioned using the subnet IDs. Specify one of subnet_ids , db_subnet_group_name or availability_zone |
list(string) |
[] |
no |
tags | Additional tags (e.g. {'BusinessUnit': 'XYZ'} ).Neither the tag keys nor the tag values will be modified by this module. |
map(string) |
{} |
no |
tenant | ID element _(Rarely used, not included by default)_. A customer identifier, indicating who this instance of a resource is for | string |
null |
no |
timeouts | A list of DB timeouts to apply to the running code while creating, updating, or deleting the DB instance. | object({ |
{ |
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 |
vpc_id | VPC ID the DB instance will be created in | string |
n/a | yes |
Name | Description |
---|---|
hostname | DNS host name of the instance |
instance_address | Address of the instance |
instance_arn | ARN of the instance |
instance_endpoint | DNS Endpoint of the instance |
instance_id | ID of the instance |
master_user_secret | Secret object if configured with var.database_manage_master_user_password = true . |
option_group_id | ID of the Option Group |
parameter_group_id | ID of the Parameter Group |
resource_id | The RDS Resource ID of this instance. |
security_group_id | ID of the Security Group |
subnet_group_id | ID of the created Subnet Group |
Check out these related projects.
- terraform-aws-rds-cluster - Terraform module to provision an RDS Aurora cluster for MySQL or Postgres
- terraform-aws-rds-cloudwatch-sns-alarms - Terraform module that configures important RDS alerts using CloudWatch and sends them to an SNS topic
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