Terraform module to provision an RDS Aurora
cluster for MySQL or Postgres.
Supports Amazon Aurora Serverless.
This project is part of our comprehensive "SweetOps" approach towards DevOps.
It's 100% Open Source and licensed under the APACHE2.
We literally have hundreds of terraform modules that are Open Source and well-maintained. Check them out!
IMPORTANT: We do not pin modules to versions in our examples because of the difficulty of keeping the versions in the documentation in sync with the latest released versions. We highly recommend that in your code you pin the version to the exact version you are using so that your infrastructure remains stable, and update versions in a systematic way so that they do not catch you by surprise.
Also, because of a bug in the Terraform registry (hashicorp/terraform#21417), the registry shows many of our inputs as required when in fact they are optional. The table below correctly indicates which inputs are required.
For a complete example, see examples/complete.
For automated tests of the complete example using bats and Terratest (which tests and deploys the example on AWS), see test.
module "rds_cluster_aurora_postgres" {
source = "cloudposse/rds-cluster/aws"
# Cloud Posse recommends pinning every module to a specific version
# version = "x.x.x"
name = "postgres"
engine = "aurora-postgresql"
cluster_family = "aurora-postgresql9.6"
cluster_size = 2
namespace = "eg"
stage = "dev"
admin_user = "admin1"
admin_password = "Test123456789"
db_name = "dbname"
db_port = 5432
instance_type = "db.r4.large"
vpc_id = "vpc-xxxxxxxx"
security_groups = ["sg-xxxxxxxx"]
subnets = ["subnet-xxxxxxxx", "subnet-xxxxxxxx"]
zone_id = "Zxxxxxxxx"
}
module "rds_cluster_aurora_mysql_serverless" {
source = "cloudposse/rds-cluster/aws"
# Cloud Posse recommends pinning every module to a specific version
# version = "x.x.x"
namespace = "eg"
stage = "dev"
name = "db"
engine = "aurora"
engine_mode = "serverless"
cluster_family = "aurora5.6"
cluster_size = 0
admin_user = "admin1"
admin_password = "Test123456789"
db_name = "dbname"
db_port = 3306
instance_type = "db.t2.small"
vpc_id = "vpc-xxxxxxxx"
security_groups = ["sg-xxxxxxxx"]
subnets = ["subnet-xxxxxxxx", "subnet-xxxxxxxx"]
zone_id = "Zxxxxxxxx"
enable_http_endpoint = true
scaling_configuration = [
{
auto_pause = true
max_capacity = 256
min_capacity = 2
seconds_until_auto_pause = 300
}
]
}
Serverless Aurora 2.07.1 MySQL 5.7
module "rds_cluster_aurora_mysql_serverless" {
source = "cloudposse/rds-cluster/aws"
# Cloud Posse recommends pinning every module to a specific version
# version = "x.x.x"
namespace = "eg"
stage = "dev"
name = "db"
engine = "aurora-mysql"
engine_mode = "serverless"
engine_version = "5.7.mysql_aurora.2.07.1"
cluster_family = "aurora-mysql5.7"
cluster_size = 0
admin_user = "admin1"
admin_password = "Test123456789"
db_name = "dbname"
db_port = 3306
vpc_id = "vpc-xxxxxxxx"
security_groups = ["sg-xxxxxxxx"]
subnets = ["subnet-xxxxxxxx", "subnet-xxxxxxxx"]
zone_id = "Zxxxxxxxx"
enable_http_endpoint = true
scaling_configuration = [
{
auto_pause = true
max_capacity = 16
min_capacity = 1
seconds_until_auto_pause = 300
timeout_action = "ForceApplyCapacityChange"
}
]
}
module "rds_cluster_aurora_mysql" {
source = "cloudposse/rds-cluster/aws"
# Cloud Posse recommends pinning every module to a specific version
# version = "x.x.x"
engine = "aurora"
cluster_family = "aurora-mysql5.7"
cluster_size = 2
namespace = "eg"
stage = "dev"
name = "db"
admin_user = "admin1"
admin_password = "Test123456789"
db_name = "dbname"
instance_type = "db.t2.small"
vpc_id = "vpc-xxxxxxx"
security_groups = ["sg-xxxxxxxx"]
subnets = ["subnet-xxxxxxxx", "subnet-xxxxxxxx"]
zone_id = "Zxxxxxxxx"
cluster_parameters = [
{
name = "character_set_client"
value = "utf8"
},
{
name = "character_set_connection"
value = "utf8"
},
{
name = "character_set_database"
value = "utf8"
},
{
name = "character_set_results"
value = "utf8"
},
{
name = "character_set_server"
value = "utf8"
},
{
name = "collation_connection"
value = "utf8_bin"
},
{
name = "collation_server"
value = "utf8_bin"
},
{
name = "lower_case_table_names"
value = "1"
apply_method = "pending-reboot"
},
{
name = "skip-character-set-client-handshake"
value = "1"
apply_method = "pending-reboot"
}
]
}
# create IAM role for monitoring
resource "aws_iam_role" "enhanced_monitoring" {
name = "rds-cluster-example-1"
assume_role_policy = data.aws_iam_policy_document.enhanced_monitoring.json
}
# Attach Amazon's managed policy for RDS enhanced monitoring
resource "aws_iam_role_policy_attachment" "enhanced_monitoring" {
role = aws_iam_role.enhanced_monitoring.name
policy_arn = "arn:aws:iam::aws:policy/service-role/AmazonRDSEnhancedMonitoringRole"
}
# allow rds to assume this role
data "aws_iam_policy_document" "enhanced_monitoring" {
statement {
actions = [
"sts:AssumeRole",
]
effect = "Allow"
principals {
type = "Service"
identifiers = ["monitoring.rds.amazonaws.com"]
}
}
}
module "rds_cluster_aurora_postgres" {
source = "cloudposse/rds-cluster/aws"
# Cloud Posse recommends pinning every module to a specific version
# version = "x.x.x"
engine = "aurora-postgresql"
cluster_family = "aurora-postgresql9.6"
cluster_size = 2
namespace = "eg"
stage = "dev"
name = "db"
admin_user = "admin1"
admin_password = "Test123456789"
db_name = "dbname"
db_port = 5432
instance_type = "db.r4.large"
vpc_id = "vpc-xxxxxxx"
security_groups = ["sg-xxxxxxxx"]
subnets = ["subnet-xxxxxxxx", "subnet-xxxxxxxx"]
zone_id = "Zxxxxxxxx"
# enable monitoring every 30 seconds
rds_monitoring_interval = 30
# reference iam role created above
rds_monitoring_role_arn = aws_iam_role.enhanced_monitoring.arn
}
Review the complete example to see how to use this module.
Available targets:
help Help screen
help/all Display help for all targets
help/short This help short screen
lint Lint terraform code
Name | Version |
---|---|
terraform | >= 0.12.26 |
aws | >= 3.1.15 |
null | >= 2.0 |
Name | Version |
---|---|
aws | >= 3.1.15 |
Name | Description | Type | Default | Required |
---|---|---|---|---|
additional_tag_map | Additional tags for appending to tags_as_list_of_maps. Not added to tags . |
map(string) |
{} |
no |
admin_password | (Required unless a snapshot_identifier is provided) Password for the master DB user | string |
"" |
no |
admin_user | (Required unless a snapshot_identifier is provided) Username for the master DB user | string |
"admin" |
no |
allowed_cidr_blocks | List of CIDR blocks allowed to access the cluster | list(string) |
[] |
no |
apply_immediately | Specifies whether any cluster modifications are applied immediately, or during the next maintenance window | bool |
true |
no |
attributes | Additional attributes (e.g. 1 ) |
list(string) |
[] |
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 |
autoscaling_enabled | Whether to enable cluster autoscaling | bool |
false |
no |
autoscaling_max_capacity | Maximum number of instances to be maintained by the autoscaler | number |
5 |
no |
autoscaling_min_capacity | Minimum number of instances to be maintained by the autoscaler | number |
1 |
no |
autoscaling_policy_type | Autoscaling policy type. TargetTrackingScaling and StepScaling are supported |
string |
"TargetTrackingScaling" |
no |
autoscaling_scale_in_cooldown | The amount of time, in seconds, after a scaling activity completes and before the next scaling down activity can start. Default is 300s | number |
300 |
no |
autoscaling_scale_out_cooldown | The amount of time, in seconds, after a scaling activity completes and before the next scaling up activity can start. Default is 300s | number |
300 |
no |
autoscaling_target_metrics | The metrics type to use. If this value isn't provided the default is CPU utilization | string |
"RDSReaderAverageCPUUtilization" |
no |
autoscaling_target_value | The target value to scale with respect to target metrics | number |
75 |
no |
backtrack_window | The target backtrack window, in seconds. Only available for aurora engine currently. Must be between 0 and 259200 (72 hours) | number |
0 |
no |
backup_window | Daily time range during which the backups happen | string |
"07:00-09:00" |
no |
cluster_dns_name | Name of the cluster CNAME record to create in the parent DNS zone specified by zone_id . If left empty, the name will be auto-asigned using the format master.var.name |
string |
"" |
no |
cluster_family | The family of the DB cluster parameter group | string |
"aurora5.6" |
no |
cluster_identifier | The RDS Cluster Identifier. Will use generated label ID if not supplied | string |
"" |
no |
cluster_parameters | List of DB cluster parameters to apply | list(object({ |
[] |
no |
cluster_size | Number of DB instances to create in the cluster | number |
2 |
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. |
object({ |
{ |
no |
copy_tags_to_snapshot | Copy tags to backup snapshots | bool |
false |
no |
db_name | Database name (default is not to create a database) | string |
"" |
no |
db_port | Database port | number |
3306 |
no |
deletion_protection | If the DB instance should have deletion protection enabled | bool |
false |
no |
delimiter | Delimiter to be used between namespace , environment , stage , name and attributes .Defaults to - (hyphen). Set to "" to use no delimiter at all. |
string |
null |
no |
enable_http_endpoint | Enable HTTP endpoint (data API). Only valid when engine_mode is set to serverless | bool |
false |
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 export to cloudwatch. The following log types are supported: audit, error, general, slowquery | list(string) |
[] |
no |
engine | The name of the database engine to be used for this DB cluster. Valid values: aurora , aurora-mysql , aurora-postgresql |
string |
"aurora" |
no |
engine_mode | The database engine mode. Valid values: parallelquery , provisioned , serverless |
string |
"provisioned" |
no |
engine_version | The version of the database engine to use. See aws rds describe-db-engine-versions |
string |
"" |
no |
enhanced_monitoring_role_enabled | A boolean flag to enable/disable the creation of the enhanced monitoring IAM role. If set to false , the module will not create a new role and will use rds_monitoring_role_arn for enhanced monitoring |
bool |
false |
no |
environment | Environment, e.g. 'uw2', 'us-west-2', OR 'prod', 'staging', 'dev', 'UAT' | string |
null |
no |
global_cluster_identifier | ID of the Aurora global cluster | string |
"" |
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 |
iam_roles | Iam roles for the Aurora cluster | list(string) |
[] |
no |
id_length_limit | Limit id to this many characters.Set to 0 for unlimited length.Set to null for default, which is 0 .Does not affect id_full . |
number |
null |
no |
instance_availability_zone | Optional parameter to place cluster instances in a specific availability zone. If left empty, will place randomly | string |
"" |
no |
instance_parameters | List of DB instance parameters to apply | list(object({ |
[] |
no |
instance_type | Instance type to use | string |
"db.t2.small" |
no |
kms_key_arn | The ARN for the KMS encryption key. When specifying kms_key_arn , storage_encrypted needs to be set to true |
string |
"" |
no |
label_order | The naming order of the id output and Name tag. Defaults to ["namespace", "environment", "stage", "name", "attributes"]. You can omit any of the 5 elements, but at least one must be present. |
list(string) |
null |
no |
maintenance_window | Weekly time range during which system maintenance can occur, in UTC | string |
"wed:03:00-wed:04:00" |
no |
name | Solution name, e.g. 'app' or 'jenkins' | string |
null |
no |
namespace | Namespace, which could be your organization name or abbreviation, e.g. 'eg' or 'cp' | string |
null |
no |
performance_insights_enabled | Whether to enable Performance Insights | bool |
false |
no |
performance_insights_kms_key_id | The ARN for the KMS key to encrypt Performance Insights data. When specifying performance_insights_kms_key_id , performance_insights_enabled needs to be set to true |
string |
"" |
no |
publicly_accessible | Set to true if you want your cluster to be publicly accessible (such as via QuickSight) | bool |
false |
no |
rds_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 |
rds_monitoring_role_arn | The ARN for the IAM role that permits RDS to send enhanced monitoring metrics to CloudWatch Logs | string |
null |
no |
reader_dns_name | Name of the reader endpoint CNAME record to create in the parent DNS zone specified by zone_id . If left empty, the name will be auto-asigned using the format replicas.var.name |
string |
"" |
no |
regex_replace_chars | Regex to replace chars with empty string in namespace , environment , stage and name .If not set, "/[^a-zA-Z0-9-]/" is used to remove all characters other than hyphens, letters and digits. |
string |
null |
no |
replication_source_identifier | ARN of a source DB cluster or DB instance if this DB cluster is to be created as a Read Replica | string |
"" |
no |
restore_to_point_in_time | List point-in-time recovery options. Only valid actions are source_cluster_identifier , restore_type and use_latest_restorable_time |
list(object({ |
[] |
no |
retention_period | Number of days to retain backups for | number |
5 |
no |
s3_import | Restore from a Percona Xtrabackup in S3. The bucket_name is required to be in the same region as the resource. |
object({ |
null |
no |
scaling_configuration | List of nested attributes with scaling properties. Only valid when engine_mode is set to serverless |
list(object({ |
[] |
no |
security_groups | List of security groups to be allowed to connect to the DB instance | list(string) |
[] |
no |
skip_final_snapshot | Determines whether a final DB snapshot is created before the DB cluster is deleted | bool |
true |
no |
snapshot_identifier | Specifies whether or not to create this cluster from a snapshot | string |
null |
no |
source_region | Source Region of primary cluster, needed when using encrypted storage and region replicas | string |
"" |
no |
stage | Stage, e.g. 'prod', 'staging', 'dev', OR 'source', 'build', 'test', 'deploy', 'release' | string |
null |
no |
storage_encrypted | Specifies whether the DB cluster is encrypted. The default is false for provisioned engine_mode and true for serverless engine_mode |
bool |
false |
no |
subnets | List of VPC subnet IDs | list(string) |
n/a | yes |
tags | Additional tags (e.g. map('BusinessUnit','XYZ') |
map(string) |
{} |
no |
timeouts_configuration | List of timeout values per action. Only valid actions are create , update and delete |
list(object({ |
[] |
no |
vpc_id | VPC ID to create the cluster in (e.g. vpc-a22222ee ) |
string |
n/a | yes |
vpc_security_group_ids | Additional security group IDs to apply to the cluster, in addition to the provisioned default security group with ingress traffic from existing CIDR blocks and existing security groups | list(string) |
[] |
no |
zone_id | Route53 parent zone ID. If provided (not empty), the module will create sub-domain DNS records for the DB master and replicas | string |
"" |
no |
Name | Description |
---|---|
arn | Amazon Resource Name (ARN) of the cluster |
cluster_identifier | Cluster Identifier |
cluster_resource_id | The region-unique, immutable identifie of the cluster |
cluster_security_groups | Default RDS cluster security groups |
database_name | Database name |
dbi_resource_ids | List of the region-unique, immutable identifiers for the DB instances in the cluster |
endpoint | The DNS address of the RDS instance |
master_host | DB Master hostname |
master_username | Username for the master DB user |
reader_endpoint | A read-only endpoint for the Aurora cluster, automatically load-balanced across replicas |
replicas_host | Replicas hostname |
security_group_arn | Security Group ARN |
security_group_id | Security Group ID |
security_group_name | Security Group name |
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Check out these related projects.
- terraform-aws-rds - Terraform module to provision AWS RDS instances
- 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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