Skip to main content
Service Catalog Version 0.118.5Last updated in version 0.112.15

Amazon Aurora

View Source Release Notes

Overview​

This service contains code to deploy an Amazon Relational Database Service (RDS) cluster that can run Amazon Aurora, Amazon’s cloud-native relational database. The cluster is managed by AWS and automatically handles standby failover, read replicas, backups, patching, and encryption.

RDS architectureRDS architecture

Features​

  • Deploy a fully-managed, cloud-native relational database
  • MySQL and PostgreSQL compatibility
  • Automatic failover to a standby in another availability zone
  • Read replicas
  • Automatic nightly snapshots
  • Automatic cross account snapshots
  • Automatic scaling of storage
  • Scale to 0 with Aurora Serverless
  • Integrate with Kubernetes Service Discovery
  • Support Aurora Serverless v2

Learn​

note

This repo is a part of the Gruntwork Service Catalog, a collection of reusable, battle-tested, production ready infrastructure code. If you’ve never used the Service Catalog before, make sure to read How to use the Gruntwork Service Catalog!

Deploy​

Non-production deployment (quick start for learning)​

If you just want to try this repo out for experimenting and learning, check out the following resources:

  • examples/for-learning-and-testing folder: The examples/for-learning-and-testing folder contains standalone sample code optimized for learning, experimenting, and testing (but not direct production usage).

Production deployment​

If you want to deploy this repo in production, check out the following resources:

Sample Usage​

main.tf

# ------------------------------------------------------------------------------------------------------
# DEPLOY GRUNTWORK'S AURORA MODULE
#
# NOTE: This module uses some sensitive variables marked inline with "# SENSITIVE".
# When using values other than defaults for these variables, set them through environment variables or
# another secure method.
#
# ------------------------------------------------------------------------------------------------------

module "aurora" {

  source = "git::git@github.com:gruntwork-io/terraform-aws-service-catalog.git//modules/data-stores/aurora?ref=v0.118.5"

  # ----------------------------------------------------------------------------------------------------
  # REQUIRED VARIABLES
  # ----------------------------------------------------------------------------------------------------

  # The list of IDs of the subnets in which to deploy Aurora. The list must only
  # contain subnets in var.vpc_id.
  aurora_subnet_ids = <list(string)>

  # The name used to namespace all the Aurora resources created by these
  # templates, including the cluster and cluster instances (e.g. drupaldb). Must
  # be unique in this region. Must be a lowercase string.
  name = <string>

  # The ID of the VPC in which to deploy Aurora.
  vpc_id = <string>

  # ----------------------------------------------------------------------------------------------------
  # OPTIONAL VARIABLES
  # ----------------------------------------------------------------------------------------------------

  # The ARNs of SNS topics where CloudWatch alarms (e.g., for CPU, memory, and
  # disk space usage) should send notifications. Also used for the alarms if the
  # share snapshot backup job fails.
  alarms_sns_topic_arns = []

  # The list of network CIDR blocks to allow network access to Aurora from. One
  # of var.allow_connections_from_cidr_blocks or
  # var.allow_connections_from_security_groups must be specified for the
  # database to be reachable.
  allow_connections_from_cidr_blocks = []

  # The list of IDs or Security Groups to allow network access to Aurora from.
  # All security groups must either be in the VPC specified by var.vpc_id, or a
  # peered VPC with the VPC specified by var.vpc_id. One of
  # var.allow_connections_from_cidr_blocks or
  # var.allow_connections_from_security_groups must be specified for the
  # database to be reachable.
  allow_connections_from_security_groups = []

  # Enable to allow major engine version upgrades when changing engine versions.
  allow_major_version_upgrade = false

  # Specifies whether any cluster modifications are applied immediately, or
  # during the next maintenance window. Note that cluster modifications may
  # cause degraded performance or downtime.
  apply_immediately = false

  # Configure the auto minor version upgrade behavior. This is applied to the
  # cluster instances and indicates if the automatic minor version upgrade of
  # the engine is allowed. Default value is true.
  auto_minor_version_upgrade = true

  # How often, in seconds, the backup job is expected to run. This is the same
  # as var.schedule_expression, but unfortunately, Terraform offers no way to
  # convert rate expressions to seconds. We add a CloudWatch alarm that triggers
  # if the metric in var.create_snapshot_cloudwatch_metric_namespace isn't
  # updated within this time period, as that indicates the backup failed to run.
  backup_job_alarm_period = 3600

  # Sets how the backup job alarm should handle entering the INSUFFICIENT_DATA
  # state. Based on
  # https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/AlarmThatSendsEmail.html#alarms-and-missing-data.
  # Must be one of: 'missing', 'ignore', 'breaching' or 'notBreaching'.
  backup_job_alarm_treat_missing_data = "missing"

  # How many days to keep backup snapshots around before cleaning them up. Max:
  # 35
  backup_retention_period = 30

  # The Certificate Authority (CA) certificate bundle to use on the Aurora DB
  # instances. Possible values: rds-ca-2019 (default if nothing is specified),
  # rds-ca-rsa2048-g1, rds-ca-rsa4096-g1, rds-ca-ecc384-g1.
  ca_cert_identifier = null

  # Copy all the Aurora cluster tags to snapshots. Default is false.
  copy_tags_to_snapshot = false

  # Set to true if you want a DNS record automatically created and pointed at
  # the RDS endpoints.
  create_route53_entry = false

  # The namespace to use for the CloudWatch metric we report every time a new
  # RDS snapshot is created. We add a CloudWatch alarm on this metric to notify
  # us if the backup job fails to run for any reason. Defaults to the cluster
  # name.
  create_snapshot_cloudwatch_metric_namespace = null

  # A map of custom tags to apply to the RDS cluster and all associated
  # resources created for it. The key is the tag name and the value is the tag
  # value.
  custom_tags = {}

  # Parameters for the cpu usage widget to output for use in a CloudWatch
  # dashboard.
  dashboard_cpu_usage_widget_parameters = {"height":6,"period":60,"width":8}

  # Parameters for the database connections widget to output for use in a
  # CloudWatch dashboard.
  dashboard_db_connections_widget_parameters = {"height":6,"period":60,"width":8}

  # Parameters for the available disk space widget to output for use in a
  # CloudWatch dashboard.
  dashboard_disk_space_widget_parameters = {"height":6,"period":60,"width":8}

  # Parameters for the available memory widget to output for use in a CloudWatch
  # dashboard.
  dashboard_memory_widget_parameters = {"height":6,"period":60,"width":8}

  # Parameters for the read latency widget to output for use in a CloudWatch
  # dashboard.
  dashboard_read_latency_widget_parameters = {"height":6,"period":60,"width":8}

  # Parameters for the read latency widget to output for use in a CloudWatch
  # dashboard.
  dashboard_write_latency_widget_parameters = {"height":6,"period":60,"width":8}

  # Configure a custom parameter group for the RDS DB cluster. This will create
  # a new parameter group with the given parameters. When null, the database
  # will be launched with the default parameter group.
  db_cluster_custom_parameter_group = null

  # The friendly name or ARN of an AWS Secrets Manager secret that contains
  # database configuration information in the format outlined by this document:
  # https://docs.aws.amazon.com/secretsmanager/latest/userguide/best-practices.html.
  # The engine, username, password, dbname, and port fields must be included in
  # the JSON. Note that even with this precaution, this information will be
  # stored in plaintext in the Terraform state file! See the following blog post
  # for more details:
  # https://blog.gruntwork.io/a-comprehensive-guide-to-managing-secrets-in-your-terraform-code-1d586955ace1.
  # If you do not wish to use Secrets Manager, leave this as null, and use the
  # master_username, master_password, db_name, engine, and port variables.
  db_config_secrets_manager_id = null

  # Configure a custom parameter group for the RDS DB Instance. This will create
  # a new parameter group with the given parameters. When null, the database
  # will be launched with the default parameter group.
  db_instance_custom_parameter_group = null

  # The name for your database of up to 8 alpha-numeric characters. If you do
  # not provide a name, Amazon RDS will not create a database in the DB cluster
  # you are creating. This can also be provided via AWS Secrets Manager. See the
  # description of db_config_secrets_manager_id. A value here overrides the
  # value in db_config_secrets_manager_id.
  db_name = null

  # Set to true to enable several basic CloudWatch alarms around CPU usage,
  # memory usage, and disk space usage. If set to true, make sure to specify SNS
  # topics to send notifications to using var.alarms_sns_topic_arn.
  enable_cloudwatch_alarms = true

  # When true, enable CloudWatch metrics for the manual snapshots created for
  # the purpose of sharing with another account.
  enable_cloudwatch_metrics = true

  # Enable deletion protection on the database instance. If this is enabled, the
  # database cannot be deleted.
  enable_deletion_protection = false

  # Set to true to enable alarms related to performance, such as read and write
  # latency alarms. Set to false to disable those alarms if you aren't sure what
  # would be reasonable perf numbers for your RDS set up or if those numbers are
  # too unpredictable.
  enable_perf_alarms = true

  # When true, enable CloudWatch alarms for the manual snapshots created for the
  # purpose of sharing with another account. Only used if
  # var.share_snapshot_with_another_account is true.
  enable_share_snapshot_cloudwatch_alarms = true

  # If non-empty, the Aurora cluster will export the specified logs to
  # Cloudwatch. Must be zero or more of: audit, error, general and slowquery
  enabled_cloudwatch_logs_exports = []

  # The name of the database engine to be used for this DB cluster. Valid
  # Values: aurora (for MySQL 5.6-compatible Aurora), aurora-mysql (for MySQL
  # 5.7-compatible Aurora), and aurora-postgresql. This can also be provided via
  # AWS Secrets Manager. See the description of db_config_secrets_manager_id. A
  # value here overrides the value in db_config_secrets_manager_id.
  engine = null

  # The version of aurora to run - provisioned or serverless.
  engine_mode = "provisioned"

  # The Amazon Aurora DB engine version for the selected engine and engine_mode.
  # Note: Starting with Aurora MySQL 2.03.2, Aurora engine versions have the
  # following syntax <mysql-major-version>.mysql_aurora.<aurora-mysql-version>.
  # e.g. 5.7.mysql_aurora.2.08.1.
  engine_version = null

  # Global cluster identifier when creating the global secondary cluster.
  global_cluster_identifier = null

  # The period, in seconds, over which to measure the CPU utilization
  # percentage.
  high_cpu_utilization_period = 60

  # Trigger an alarm if the DB instance has a CPU utilization percentage above
  # this threshold.
  high_cpu_utilization_threshold = 90

  # Sets how this alarm should handle entering the INSUFFICIENT_DATA state.
  # Based on
  # https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/AlarmThatSendsEmail.html#alarms-and-missing-data.
  # Must be one of: 'missing', 'ignore', 'breaching' or 'notBreaching'.
  high_cpu_utilization_treat_missing_data = "missing"

  # The period, in seconds, over which to measure the read latency.
  high_read_latency_period = 60

  # Trigger an alarm if the DB instance read latency (average amount of time
  # taken per disk I/O operation), in seconds, is above this threshold.
  high_read_latency_threshold = 5

  # Sets how this alarm should handle entering the INSUFFICIENT_DATA state.
  # Based on
  # https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/AlarmThatSendsEmail.html#alarms-and-missing-data.
  # Must be one of: 'missing', 'ignore', 'breaching' or 'notBreaching'.
  high_read_latency_treat_missing_data = "missing"

  # The period, in seconds, over which to measure the write latency.
  high_write_latency_period = 60

  # Trigger an alarm if the DB instance write latency (average amount of time
  # taken per disk I/O operation), in seconds, is above this threshold.
  high_write_latency_threshold = 5

  # Sets how this alarm should handle entering the INSUFFICIENT_DATA state.
  # Based on
  # https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/AlarmThatSendsEmail.html#alarms-and-missing-data.
  # Must be one of: 'missing', 'ignore', 'breaching' or 'notBreaching'.
  high_write_latency_treat_missing_data = "missing"

  # The ID of the hosted zone in which to write DNS records
  hosted_zone_id = null

  # Specifies whether mappings of AWS Identity and Access Management (IAM)
  # accounts to database accounts is enabled. Disabled by default.
  iam_database_authentication_enabled = false

  # The number of DB instances, including the primary, to run in the RDS
  # cluster. Only used when var.engine_mode is set to provisioned.
  instance_count = 1

  # The instance type to use for the db (e.g. db.r3.large). Only used when
  # var.engine_mode is set to provisioned.
  instance_type = "db.t3.medium"

  # The ARN of a KMS key that should be used to encrypt data on disk. Only used
  # if var.storage_encrypted is true. If you leave this null, the default RDS
  # KMS key for the account will be used.
  kms_key_arn = null

  # The period, in seconds, over which to measure the available free disk space.
  low_disk_space_available_period = 60

  # Trigger an alarm if the amount of disk space, in Bytes, on the DB instance
  # drops below this threshold.
  low_disk_space_available_threshold = 1000000000

  # Sets how this alarm should handle entering the INSUFFICIENT_DATA state.
  # Based on
  # https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/AlarmThatSendsEmail.html#alarms-and-missing-data.
  # Must be one of: 'missing', 'ignore', 'breaching' or 'notBreaching'.
  low_disk_space_available_treat_missing_data = "missing"

  # The period, in seconds, over which to measure the available free memory.
  low_memory_available_period = 60

  # Trigger an alarm if the amount of free memory, in Bytes, on the DB instance
  # drops below this threshold.
  low_memory_available_threshold = 100000000

  # Sets how this alarm should handle entering the INSUFFICIENT_DATA state.
  # Based on
  # https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/AlarmThatSendsEmail.html#alarms-and-missing-data.
  # Must be one of: 'missing', 'ignore', 'breaching' or 'notBreaching'.
  low_memory_available_treat_missing_data = "missing"

  # Set to true to allow RDS to manage the master user password in Secrets
  # Manager. Cannot be set if password is provided.
  manage_master_user_password = null

  # The value to use for the master password of the database. This can also be
  # provided via AWS Secrets Manager. See the description of
  # db_config_secrets_manager_id. A value here overrides the value in
  # db_config_secrets_manager_id.
  master_password = null # SENSITIVE

  # The value to use for the master username of the database. This can also be
  # provided via AWS Secrets Manager. See the description of
  # db_config_secrets_manager_id. A value here overrides the value in
  # db_config_secrets_manager_id.
  master_username = null

  # Specifies whether Performance Insights is enabled or not. On Aurora MySQL,
  # Performance Insights is not supported on db.t2 or db.t3 DB instance classes.
  performance_insights_enabled = false

  # The ARN for the KMS key to encrypt Performance Insights data.
  performance_insights_kms_key_id = null

  # The port the DB will listen on (e.g. 3306). This can also be provided via
  # AWS Secrets Manager. See the description of db_config_secrets_manager_id. A
  # value here overrides the value in db_config_secrets_manager_id.
  port = null

  # The daily time range during which automated backups are created (e.g.
  # 04:00-09:00). Time zone is UTC. Performance may be degraded while a backup
  # runs.
  preferred_backup_window = "06:00-07:00"

  # The weekly day and time range during which cluster maintenance can occur
  # (e.g. wed:04:00-wed:04:30). Time zone is UTC. Performance may be degraded or
  # there may even be a downtime during maintenance windows.
  preferred_maintenance_window = "sun:07:00-sun:08:00"

  # The domain name to create a route 53 record for the primary endpoint of the
  # RDS database.
  primary_domain_name = null

  # If you wish to make your database accessible from the public Internet, set
  # this flag to true (WARNING: NOT RECOMMENDED FOR REGULAR USAGE!!). The
  # default is false, which means the database is only accessible from within
  # the VPC, which is much more secure. This flag MUST be false for serverless
  # mode.
  publicly_accessible = false

  # The domain name to create a route 53 record for the reader endpoint of the
  # RDS database. Note that Aurora Serverless does not have reader endpoints, so
  # this option is ignored when engine_mode is set to serverless. 
  reader_domain_name = null

  # ARN of a source DB cluster or DB instance if this DB cluster is to be
  # created as a Read Replica.
  replication_source_identifier = null

  # If non-empty, the Aurora cluster will be restored from the given source
  # cluster using the latest restorable time. Can only be used if
  # snapshot_identifier is null. For more information see
  # https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/USER_PIT.html
  restore_source_cluster_identifier = null

  # Only used if 'restore_source_cluster_identifier' is non-empty. Type of
  # restore to be performed. Valid options are 'full-copy' and 'copy-on-write'.
  # https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/Aurora.Managing.Clone.html
  restore_type = null

  # Whether to enable automatic pause. A DB cluster can be paused only when it's
  # idle (it has no connections). If a DB cluster is paused for more than seven
  # days, the DB cluster might be backed up with a snapshot. In this case, the
  # DB cluster is restored when there is a request to connect to it. Only used
  # when var.engine_mode is set to serverless.
  scaling_configuration_auto_pause = true

  # The maximum capacity. The maximum capacity must be greater than or equal to
  # the minimum capacity. Valid capacity values are 2, 4, 8, 16, 32, 64, 128,
  # and 256. Only used when var.engine_mode is set to serverless.
  scaling_configuration_max_capacity = 256

  scaling_configuration_max_capacity_V2 = null

  # The minimum capacity. The minimum capacity must be lesser than or equal to
  # the maximum capacity. Valid capacity values are 2, 4, 8, 16, 32, 64, 128,
  # and 256. Only used when var.engine_mode is set to serverless.
  scaling_configuration_min_capacity = 2

  scaling_configuration_min_capacity_V2 = null

  # The time, in seconds, before an Aurora DB cluster in serverless mode is
  # paused. Valid values are 300 through 86400. Only used when var.engine_mode
  # is set to serverless.
  scaling_configuration_seconds_until_auto_pause = 300

  # The maximum number of snapshots to keep around for the purpose of cross
  # account sharing. Once this number is exceeded, a lambda function will delete
  # the oldest snapshots. Only used if var.share_snapshot_with_another_account
  # is true.
  share_snapshot_max_snapshots = 30

  # An expression that defines how often to run the lambda function to take
  # snapshots for the purpose of cross account sharing. For example, cron(0 20 *
  # * ? *) or rate(5 minutes). Required if
  # var.share_snapshot_with_another_account is true
  share_snapshot_schedule_expression = null

  # The ID of the AWS Account that the snapshot should be shared with. Required
  # if var.share_snapshot_with_another_account is true.
  share_snapshot_with_account_id = null

  # If set to true, take periodic snapshots of the Aurora DB that should be
  # shared with another account.
  share_snapshot_with_another_account = false

  # Determines whether a final DB snapshot is created before the DB instance is
  # deleted. Be very careful setting this to true; if you do, and you delete
  # this DB instance, you will not have any backups of the data! You almost
  # never want to set this to true, unless you are doing automated or manual
  # testing.
  skip_final_snapshot = false

  # If non-null, the RDS Instance will be restored from the given Snapshot ID.
  # This is the Snapshot ID you'd find in the RDS console, e.g:
  # rds:production-2015-06-26-06-05.
  snapshot_identifier = null

  # Specifies whether the DB cluster uses encryption for data at rest in the
  # underlying storage for the DB, its automated backups, Read Replicas, and
  # snapshots. Uses the default aws/rds key in KMS.
  storage_encrypted = true

  # Trigger an alarm if the number of connections to the DB instance goes above
  # this threshold.
  too_many_db_connections_threshold = null

}


Reference​

Required​

aurora_subnet_idslist(string)required

The list of IDs of the subnets in which to deploy Aurora. The list must only contain subnets in vpc_id.

namestringrequired

The name used to namespace all the Aurora resources created by these templates, including the cluster and cluster instances (e.g. drupaldb). Must be unique in this region. Must be a lowercase string.

vpc_idstringrequired

The ID of the VPC in which to deploy Aurora.

Optional​

alarms_sns_topic_arnslist(string)optional

The ARNs of SNS topics where CloudWatch alarms (e.g., for CPU, memory, and disk space usage) should send notifications. Also used for the alarms if the share snapshot backup job fails.

[]

The list of network CIDR blocks to allow network access to Aurora from. One of allow_connections_from_cidr_blocks or allow_connections_from_security_groups must be specified for the database to be reachable.

[]

The list of IDs or Security Groups to allow network access to Aurora from. All security groups must either be in the VPC specified by vpc_id, or a peered VPC with the VPC specified by vpc_id. One of allow_connections_from_cidr_blocks or allow_connections_from_security_groups must be specified for the database to be reachable.

[]

Enable to allow major engine version upgrades when changing engine versions.

false
apply_immediatelybooloptional

Specifies whether any cluster modifications are applied immediately, or during the next maintenance window. Note that cluster modifications may cause degraded performance or downtime.

false

Configure the auto minor version upgrade behavior. This is applied to the cluster instances and indicates if the automatic minor version upgrade of the engine is allowed. Default value is true.

true

How often, in seconds, the backup job is expected to run. This is the same as schedule_expression, but unfortunately, Terraform offers no way to convert rate expressions to seconds. We add a CloudWatch alarm that triggers if the metric in create_snapshot_cloudwatch_metric_namespace isn't updated within this time period, as that indicates the backup failed to run.

3600
Details

   Default to hourly

Sets how the backup job alarm should handle entering the INSUFFICIENT_DATA state. Based on https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/AlarmThatSendsEmail.html#alarms-and-missing-data. Must be one of: 'missing', 'ignore', 'breaching' or 'notBreaching'.

"missing"

How many days to keep backup snapshots around before cleaning them up. Max: 35

30
ca_cert_identifierstringoptional

The Certificate Authority (CA) certificate bundle to use on the Aurora DB instances. Possible values: rds-ca-2019 (default if nothing is specified), rds-ca-rsa2048-g1, rds-ca-rsa4096-g1, rds-ca-ecc384-g1.

null

Copy all the Aurora cluster tags to snapshots. Default is false.

false

Set to true if you want a DNS record automatically created and pointed at the RDS endpoints.

false

The namespace to use for the CloudWatch metric we report every time a new RDS snapshot is created. We add a CloudWatch alarm on this metric to notify us if the backup job fails to run for any reason. Defaults to the cluster name.

null
custom_tagsmap(string)optional

A map of custom tags to apply to the RDS cluster and all associated resources created for it. The key is the tag name and the value is the tag value.

{}

Parameters for the cpu usage widget to output for use in a CloudWatch dashboard.

object({
    # The period in seconds for metrics to sample across.
    period = number

    # The width and height of the widget in grid units in a 24 column grid. E.g., a value of 12 will take up half the
    # space.
    width  = number
    height = number
  })
{
  height = 6,
  period = 60,
  width = 8
}
Details

     The width and height of the widget in grid units in a 24 column grid. E.g., a value of 12 will take up half the
     space.

Parameters for the database connections widget to output for use in a CloudWatch dashboard.

object({
    # The period in seconds for metrics to sample across.
    period = number

    # The width and height of the widget in grid units in a 24 column grid. E.g., a value of 12 will take up half the
    # space.
    width  = number
    height = number
  })
{
  height = 6,
  period = 60,
  width = 8
}
Details

     The width and height of the widget in grid units in a 24 column grid. E.g., a value of 12 will take up half the
     space.

Parameters for the available disk space widget to output for use in a CloudWatch dashboard.

object({
    # The period in seconds for metrics to sample across.
    period = number

    # The width and height of the widget in grid units in a 24 column grid. E.g., a value of 12 will take up half the
    # space.
    width  = number
    height = number
  })
{
  height = 6,
  period = 60,
  width = 8
}
Details

     The width and height of the widget in grid units in a 24 column grid. E.g., a value of 12 will take up half the
     space.

Parameters for the available memory widget to output for use in a CloudWatch dashboard.

object({
    # The period in seconds for metrics to sample across.
    period = number

    # The width and height of the widget in grid units in a 24 column grid. E.g., a value of 12 will take up half the
    # space.
    width  = number
    height = number
  })
{
  height = 6,
  period = 60,
  width = 8
}
Details

     The width and height of the widget in grid units in a 24 column grid. E.g., a value of 12 will take up half the
     space.

Parameters for the read latency widget to output for use in a CloudWatch dashboard.

object({
    # The period in seconds for metrics to sample across.
    period = number

    # The width and height of the widget in grid units in a 24 column grid. E.g., a value of 12 will take up half the
    # space.
    width  = number
    height = number
  })
{
  height = 6,
  period = 60,
  width = 8
}
Details

     The width and height of the widget in grid units in a 24 column grid. E.g., a value of 12 will take up half the
     space.

Parameters for the read latency widget to output for use in a CloudWatch dashboard.

object({
    # The period in seconds for metrics to sample across.
    period = number

    # The width and height of the widget in grid units in a 24 column grid. E.g., a value of 12 will take up half the
    # space.
    width  = number
    height = number
  })
{
  height = 6,
  period = 60,
  width = 8
}
Details

     The width and height of the widget in grid units in a 24 column grid. E.g., a value of 12 will take up half the
     space.

Configure a custom parameter group for the RDS DB cluster. This will create a new parameter group with the given parameters. When null, the database will be launched with the default parameter group.

object({
    # Name of the parameter group to create
    name = string

    # The family of the DB cluster parameter group.
    family = string

    # The parameters to configure on the created parameter group.
    parameters = list(object({
      # Parameter name to configure.
      name = string

      # Vaue to set the parameter.
      value = string

      # When to apply the parameter. "immediate" or "pending-reboot".
      apply_method = string
    }))
  })
null
Details

     The family of the DB cluster parameter group.

Details

     The parameters to configure on the created parameter group.

Details

       Vaue to set the parameter.

Details

       When to apply the parameter. "immediate" or "pending-reboot".

The friendly name or ARN of an AWS Secrets Manager secret that contains database configuration information in the format outlined by this document: https://docs.aws.amazon.com/secretsmanager/latest/userguide/best-practices.html. The engine, username, password, dbname, and port fields must be included in the JSON. Note that even with this precaution, this information will be stored in plaintext in the Terraform state file! See the following blog post for more details: https://blog.gruntwork.io/a-comprehensive-guide-to-managing-secrets-in-your-terraform-code-1d586955ace1. If you do not wish to use Secrets Manager, leave this as null, and use the master_username, master_password, db_name, engine, and port variables.

null

Configure a custom parameter group for the RDS DB Instance. This will create a new parameter group with the given parameters. When null, the database will be launched with the default parameter group.

object({
    # Name of the parameter group to create
    name = string

    # The family of the DB cluster parameter group.
    family = string

    # The parameters to configure on the created parameter group.
    parameters = list(object({
      # Parameter name to configure.
      name = string

      # Vaue to set the parameter.
      value = string

      # When to apply the parameter. "immediate" or "pending-reboot".
      apply_method = string
    }))
  })
null
Details

     The family of the DB cluster parameter group.

Details

     The parameters to configure on the created parameter group.

Details

       Vaue to set the parameter.

Details

       When to apply the parameter. "immediate" or "pending-reboot".

db_namestringoptional

The name for your database of up to 8 alpha-numeric characters. If you do not provide a name, Amazon RDS will not create a database in the DB cluster you are creating. This can also be provided via AWS Secrets Manager. See the description of db_config_secrets_manager_id. A value here overrides the value in db_config_secrets_manager_id.

null

Set to true to enable several basic CloudWatch alarms around CPU usage, memory usage, and disk space usage. If set to true, make sure to specify SNS topics to send notifications to using alarms_sns_topic_arn.

true

When true, enable CloudWatch metrics for the manual snapshots created for the purpose of sharing with another account.

true

Enable deletion protection on the database instance. If this is enabled, the database cannot be deleted.

false
enable_perf_alarmsbooloptional

Set to true to enable alarms related to performance, such as read and write latency alarms. Set to false to disable those alarms if you aren't sure what would be reasonable perf numbers for your RDS set up or if those numbers are too unpredictable.

true

When true, enable CloudWatch alarms for the manual snapshots created for the purpose of sharing with another account. Only used if share_snapshot_with_another_account is true.

true

If non-empty, the Aurora cluster will export the specified logs to Cloudwatch. Must be zero or more of: audit, error, general and slowquery

[]
enginestringoptional

The name of the database engine to be used for this DB cluster. Valid Values: aurora (for MySQL 5.6-compatible Aurora), aurora-mysql (for MySQL 5.7-compatible Aurora), and aurora-postgresql. This can also be provided via AWS Secrets Manager. See the description of db_config_secrets_manager_id. A value here overrides the value in db_config_secrets_manager_id.

null
engine_modestringoptional

The version of aurora to run - provisioned or serverless.

"provisioned"
engine_versionstringoptional

The Amazon Aurora DB engine version for the selected engine and engine_mode. Note: Starting with Aurora MySQL 2.03.2, Aurora engine versions have the following syntax <mysql-major-version>.mysql_aurora.<aurora-mysql-version>. e.g. 5.7.mysql_aurora.2.08.1.

null

Global cluster identifier when creating the global secondary cluster.

null

The period, in seconds, over which to measure the CPU utilization percentage.

60

Trigger an alarm if the DB instance has a CPU utilization percentage above this threshold.

90

Sets how this alarm should handle entering the INSUFFICIENT_DATA state. Based on https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/AlarmThatSendsEmail.html#alarms-and-missing-data. Must be one of: 'missing', 'ignore', 'breaching' or 'notBreaching'.

"missing"

The period, in seconds, over which to measure the read latency.

60

Trigger an alarm if the DB instance read latency (average amount of time taken per disk I/O operation), in seconds, is above this threshold.

5

Sets how this alarm should handle entering the INSUFFICIENT_DATA state. Based on https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/AlarmThatSendsEmail.html#alarms-and-missing-data. Must be one of: 'missing', 'ignore', 'breaching' or 'notBreaching'.

"missing"

The period, in seconds, over which to measure the write latency.

60

Trigger an alarm if the DB instance write latency (average amount of time taken per disk I/O operation), in seconds, is above this threshold.

5

Sets how this alarm should handle entering the INSUFFICIENT_DATA state. Based on https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/AlarmThatSendsEmail.html#alarms-and-missing-data. Must be one of: 'missing', 'ignore', 'breaching' or 'notBreaching'.

"missing"
hosted_zone_idstringoptional

The ID of the hosted zone in which to write DNS records

null

Specifies whether mappings of AWS Identity and Access Management (IAM) accounts to database accounts is enabled. Disabled by default.

false
instance_countnumberoptional

The number of DB instances, including the primary, to run in the RDS cluster. Only used when engine_mode is set to provisioned.

1
instance_typestringoptional

The instance type to use for the db (e.g. db.r3.large). Only used when engine_mode is set to provisioned.

"db.t3.medium"
Details

   See https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/Aurora.Managing.html for the instance types supported by
   Aurora

kms_key_arnstringoptional

The ARN of a KMS key that should be used to encrypt data on disk. Only used if storage_encrypted is true. If you leave this null, the default RDS KMS key for the account will be used.

null

The period, in seconds, over which to measure the available free disk space.

60

Trigger an alarm if the amount of disk space, in Bytes, on the DB instance drops below this threshold.

1000000000
Details

   Default is 1GB (1 billion bytes)

Sets how this alarm should handle entering the INSUFFICIENT_DATA state. Based on https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/AlarmThatSendsEmail.html#alarms-and-missing-data. Must be one of: 'missing', 'ignore', 'breaching' or 'notBreaching'.

"missing"

The period, in seconds, over which to measure the available free memory.

60

Trigger an alarm if the amount of free memory, in Bytes, on the DB instance drops below this threshold.

100000000
Details

   Default is 100MB (100 million bytes)

Sets how this alarm should handle entering the INSUFFICIENT_DATA state. Based on https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/AlarmThatSendsEmail.html#alarms-and-missing-data. Must be one of: 'missing', 'ignore', 'breaching' or 'notBreaching'.

"missing"

Set to true to allow RDS to manage the master user password in Secrets Manager. Cannot be set if password is provided.

null
master_passwordstringoptional

The value to use for the master password of the database. This can also be provided via AWS Secrets Manager. See the description of db_config_secrets_manager_id. A value here overrides the value in db_config_secrets_manager_id.

null
master_usernamestringoptional

The value to use for the master username of the database. This can also be provided via AWS Secrets Manager. See the description of db_config_secrets_manager_id. A value here overrides the value in db_config_secrets_manager_id.

null

Specifies whether Performance Insights is enabled or not. On Aurora MySQL, Performance Insights is not supported on db.t2 or db.t3 DB instance classes.

false

The ARN for the KMS key to encrypt Performance Insights data.

null
portnumberoptional

The port the DB will listen on (e.g. 3306). This can also be provided via AWS Secrets Manager. See the description of db_config_secrets_manager_id. A value here overrides the value in db_config_secrets_manager_id.

null

The daily time range during which automated backups are created (e.g. 04:00-09:00). Time zone is UTC. Performance may be degraded while a backup runs.

"06:00-07:00"

The weekly day and time range during which cluster maintenance can occur (e.g. wed:04:00-wed:04:30). Time zone is UTC. Performance may be degraded or there may even be a downtime during maintenance windows.

"sun:07:00-sun:08:00"
primary_domain_namestringoptional

The domain name to create a route 53 record for the primary endpoint of the RDS database.

null

If you wish to make your database accessible from the public Internet, set this flag to true (WARNING: NOT RECOMMENDED FOR REGULAR USAGE!!). The default is false, which means the database is only accessible from within the VPC, which is much more secure. This flag MUST be false for serverless mode.

false
reader_domain_namestringoptional

The domain name to create a route 53 record for the reader endpoint of the RDS database. Note that Aurora Serverless does not have reader endpoints, so this option is ignored when engine_mode is set to serverless.

null

ARN of a source DB cluster or DB instance if this DB cluster is to be created as a Read Replica.

null

If non-empty, the Aurora cluster will be restored from the given source cluster using the latest restorable time. Can only be used if snapshot_identifier is null. For more information see https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/USER_PIT.html

null
restore_typestringoptional

Only used if 'restore_source_cluster_identifier' is non-empty. Type of restore to be performed. Valid options are 'full-copy' and 'copy-on-write'. https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/Aurora.Managing.Clone.html

null

Whether to enable automatic pause. A DB cluster can be paused only when it's idle (it has no connections). If a DB cluster is paused for more than seven days, the DB cluster might be backed up with a snapshot. In this case, the DB cluster is restored when there is a request to connect to it. Only used when engine_mode is set to serverless.

true

The maximum capacity. The maximum capacity must be greater than or equal to the minimum capacity. Valid capacity values are 2, 4, 8, 16, 32, 64, 128, and 256. Only used when engine_mode is set to serverless.

256
null

The minimum capacity. The minimum capacity must be lesser than or equal to the maximum capacity. Valid capacity values are 2, 4, 8, 16, 32, 64, 128, and 256. Only used when engine_mode is set to serverless.

2
null

The time, in seconds, before an Aurora DB cluster in serverless mode is paused. Valid values are 300 through 86400. Only used when engine_mode is set to serverless.

300

The maximum number of snapshots to keep around for the purpose of cross account sharing. Once this number is exceeded, a lambda function will delete the oldest snapshots. Only used if share_snapshot_with_another_account is true.

30

An expression that defines how often to run the lambda function to take snapshots for the purpose of cross account sharing. For example, cron(0 20 * * ? *) or rate(5 minutes). Required if share_snapshot_with_another_account is true

null

The ID of the AWS Account that the snapshot should be shared with. Required if share_snapshot_with_another_account is true.

null

If set to true, take periodic snapshots of the Aurora DB that should be shared with another account.

false

Determines whether a final DB snapshot is created before the DB instance is deleted. Be very careful setting this to true; if you do, and you delete this DB instance, you will not have any backups of the data! You almost never want to set this to true, unless you are doing automated or manual testing.

false
snapshot_identifierstringoptional

If non-null, the RDS Instance will be restored from the given Snapshot ID. This is the Snapshot ID you'd find in the RDS console, e.g: rds:production-2015-06-26-06-05.

null
storage_encryptedbooloptional

Specifies whether the DB cluster uses encryption for data at rest in the underlying storage for the DB, its automated backups, Read Replicas, and snapshots. Uses the default aws/rds key in KMS.

true

Trigger an alarm if the number of connections to the DB instance goes above this threshold.

null
Details

   The max number of connections allowed by RDS depends a) the type of DB, b) the DB instance type, and c) the
   use case, and it can vary from ~30 all the way up to 5,000, so we cannot pick a reasonable default here.