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Add IAM database authentication support
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Add IAM database authentication support as per:
https://www.terraform.io/docs/providers/aws/r/rds_cluster.html#iam_database_authentication_enabled
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@bashton-ajenkins
bashton-ajenkins committed Dec 11, 2018
1 parent 7014608 commit f4c7aa9
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Showing 7 changed files with 120 additions and 108 deletions.
3 changes: 2 additions & 1 deletion README.md
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Expand Up @@ -33,7 +33,7 @@ AWS doesn't automatically remove RDS instances created from autoscaling when you

### Aurora 1.x (MySQL 5.6)

```
```hcl
resource "aws_sns_topic" "db_alarms_56" {
name = "aurora-db-alarms-56"
}
Expand Down Expand Up @@ -184,6 +184,7 @@ resource "aws_rds_cluster_parameter_group" "aurora_cluster_postgres96_parameter_
| envname | Environment name (eg,test, stage or prod) | string | - | yes |
| envtype | Environment type (eg,prod or nonprod) | string | - | yes |
| final_snapshot_identifier | The name to use when creating a final snapshot on cluster destroy, appends a random 8 digits to name to ensure it's unique too. | string | `final` | no |
| iam_database_authentication_enabled | Whether to enable IAM database authentication for the RDS Cluster | string | `false` | no |
| identifier_prefix | Prefix for cluster and instance identifier | string | `` | no |
| instance_type | Instance type to use | string | `db.t2.small` | no |
| monitoring_interval | The interval (seconds) between points when Enhanced Monitoring metrics are collected | string | `0` | no |
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33 changes: 17 additions & 16 deletions main.tf
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Expand Up @@ -232,21 +232,22 @@ resource "aws_rds_cluster" "default" {
availability_zones = ["${var.azs}"]
engine = "${var.engine}"

engine_version = "${var.engine-version}"
master_username = "${var.username}"
master_password = "${var.password}"
final_snapshot_identifier = "${var.final_snapshot_identifier}-${random_id.server.hex}"
skip_final_snapshot = "${var.skip_final_snapshot}"
backup_retention_period = "${var.backup_retention_period}"
preferred_backup_window = "${var.preferred_backup_window}"
preferred_maintenance_window = "${var.preferred_maintenance_window}"
port = "${var.port}"
db_subnet_group_name = "${aws_db_subnet_group.main.name}"
vpc_security_group_ids = ["${var.security_groups}"]
snapshot_identifier = "${var.snapshot_identifier}"
storage_encrypted = "${var.storage_encrypted}"
apply_immediately = "${var.apply_immediately}"
db_cluster_parameter_group_name = "${var.db_cluster_parameter_group_name}"
engine_version = "${var.engine-version}"
master_username = "${var.username}"
master_password = "${var.password}"
final_snapshot_identifier = "${var.final_snapshot_identifier}-${random_id.server.hex}"
skip_final_snapshot = "${var.skip_final_snapshot}"
backup_retention_period = "${var.backup_retention_period}"
preferred_backup_window = "${var.preferred_backup_window}"
preferred_maintenance_window = "${var.preferred_maintenance_window}"
port = "${var.port}"
db_subnet_group_name = "${aws_db_subnet_group.main.name}"
vpc_security_group_ids = ["${var.security_groups}"]
snapshot_identifier = "${var.snapshot_identifier}"
storage_encrypted = "${var.storage_encrypted}"
apply_immediately = "${var.apply_immediately}"
db_cluster_parameter_group_name = "${var.db_cluster_parameter_group_name}"
iam_database_authentication_enabled = "${var.iam_database_authentication_enabled}"
}

// Geneate an ID when an environment is initialised
Expand All @@ -272,7 +273,7 @@ data "aws_iam_policy_document" "monitoring-rds-assume-role-policy" {

resource "aws_iam_role" "rds-enhanced-monitoring" {
count = "${var.monitoring_interval > 0 ? 1 : 0}"
name_prefix = "rds-enhanced-monitoring-${var.envname}-"
name_prefix = "rds-enhanced-mon-${var.envname}-"
assume_role_policy = "${data.aws_iam_policy_document.monitoring-rds-assume-role-policy.json}"
}

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41 changes: 21 additions & 20 deletions tests/terraform/test-mysql-56.tf
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Expand Up @@ -3,26 +3,27 @@ resource "aws_sns_topic" "db_alarms_56" {
}

module "aurora_db_56" {
source = "../.."
name = "test-aurora-db-56"
envname = "test56"
envtype = "test"
subnets = ["${module.vpc.private_subnets}"]
azs = ["${module.vpc.availability_zones}"]
replica_count = "1"
security_groups = ["${aws_security_group.allow_all.id}"]
instance_type = "db.t2.medium"
username = "root"
password = "changeme"
backup_retention_period = "5"
final_snapshot_identifier = "final-db-snapshot-prod"
storage_encrypted = "true"
apply_immediately = "true"
monitoring_interval = "10"
cw_alarms = true
cw_sns_topic = "${aws_sns_topic.db_alarms_56.id}"
db_parameter_group_name = "${aws_db_parameter_group.aurora_db_56_parameter_group.id}"
db_cluster_parameter_group_name = "${aws_rds_cluster_parameter_group.aurora_cluster_56_parameter_group.id}"
source = "../.."
name = "test-aurora-db-56"
envname = "test56"
envtype = "test"
subnets = ["${module.vpc.private_subnets}"]
azs = ["${module.vpc.availability_zones}"]
replica_count = "1"
security_groups = ["${aws_security_group.allow_all.id}"]
instance_type = "db.t2.medium"
username = "root"
password = "changeme"
backup_retention_period = "5"
final_snapshot_identifier = "final-db-snapshot-prod"
storage_encrypted = "true"
apply_immediately = "true"
monitoring_interval = "10"
cw_alarms = true
cw_sns_topic = "${aws_sns_topic.db_alarms_56.id}"
db_parameter_group_name = "${aws_db_parameter_group.aurora_db_56_parameter_group.id}"
db_cluster_parameter_group_name = "${aws_rds_cluster_parameter_group.aurora_cluster_56_parameter_group.id}"
iam_database_authentication_enabled = "true"
}

resource "aws_db_parameter_group" "aurora_db_56_parameter_group" {
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55 changes: 28 additions & 27 deletions tests/terraform/test-mysql-57-autoscaling.tf
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Expand Up @@ -3,33 +3,34 @@ resource "aws_sns_topic" "db_alarms_57_autoscaling" {
}

module "aurora_db_57_autoscaling" {
source = "../.."
engine = "aurora-mysql"
engine-version = "5.7.12"
name = "test-aurora-db-57-autoscaling"
envname = "test-57-autoscaling"
envtype = "test"
subnets = ["${module.vpc.private_subnets}"]
azs = ["${module.vpc.availability_zones}"]
security_groups = ["${aws_security_group.allow_all.id}"]
instance_type = "db.t2.medium"
username = "root"
password = "changeme"
backup_retention_period = "5"
final_snapshot_identifier = "final-db-snapshot-prod"
storage_encrypted = "true"
apply_immediately = "true"
monitoring_interval = "10"
cw_alarms = true
cw_sns_topic = "${aws_sns_topic.db_alarms_57_autoscaling.id}"
db_parameter_group_name = "${aws_db_parameter_group.aurora_db_57_autoscaling_parameter_group.id}"
db_cluster_parameter_group_name = "${aws_rds_cluster_parameter_group.aurora_57_autoscaling_cluster_parameter_group.id}"
replica_scale_enabled = true
replica_scale_min = "1"
replica_scale_max = "1"
replica_scale_cpu = "70"
replica_scale_in_cooldown = "300"
replica_scale_out_cooldown = "300"
source = "../.."
engine = "aurora-mysql"
engine-version = "5.7.12"
name = "aurora-my57-asg"
envname = "test-57-asg"
envtype = "test"
subnets = ["${module.vpc.private_subnets}"]
azs = ["${module.vpc.availability_zones}"]
security_groups = ["${aws_security_group.allow_all.id}"]
instance_type = "db.t2.medium"
username = "root"
password = "changeme"
backup_retention_period = "5"
final_snapshot_identifier = "final-db-snapshot-prod"
storage_encrypted = "true"
apply_immediately = "true"
monitoring_interval = "10"
cw_alarms = true
cw_sns_topic = "${aws_sns_topic.db_alarms_57_autoscaling.id}"
db_parameter_group_name = "${aws_db_parameter_group.aurora_db_57_autoscaling_parameter_group.id}"
db_cluster_parameter_group_name = "${aws_rds_cluster_parameter_group.aurora_57_autoscaling_cluster_parameter_group.id}"
replica_scale_enabled = true
replica_scale_min = "1"
replica_scale_max = "1"
replica_scale_cpu = "70"
replica_scale_in_cooldown = "300"
replica_scale_out_cooldown = "300"
iam_database_authentication_enabled = "true"
}

resource "aws_db_parameter_group" "aurora_db_57_autoscaling_parameter_group" {
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45 changes: 23 additions & 22 deletions tests/terraform/test-mysql-57.tf
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Expand Up @@ -3,28 +3,29 @@ resource "aws_sns_topic" "db_alarms" {
}

module "aurora_db_57" {
source = "../.."
engine = "aurora-mysql"
engine-version = "5.7.12"
name = "test-aurora-db-57"
envname = "test-57"
envtype = "test"
subnets = ["${module.vpc.private_subnets}"]
azs = ["${module.vpc.availability_zones}"]
replica_count = "1"
security_groups = ["${aws_security_group.allow_all.id}"]
instance_type = "db.t2.medium"
username = "root"
password = "changeme"
backup_retention_period = "5"
final_snapshot_identifier = "final-db-snapshot-prod"
storage_encrypted = "true"
apply_immediately = "true"
monitoring_interval = "10"
cw_alarms = true
cw_sns_topic = "${aws_sns_topic.db_alarms.id}"
db_parameter_group_name = "${aws_db_parameter_group.aurora_db_57_parameter_group.id}"
db_cluster_parameter_group_name = "${aws_rds_cluster_parameter_group.aurora_57_cluster_parameter_group.id}"
source = "../.."
engine = "aurora-mysql"
engine-version = "5.7.12"
name = "test-aurora-db-57"
envname = "test-57"
envtype = "test"
subnets = ["${module.vpc.private_subnets}"]
azs = ["${module.vpc.availability_zones}"]
replica_count = "1"
security_groups = ["${aws_security_group.allow_all.id}"]
instance_type = "db.t2.medium"
username = "root"
password = "changeme"
backup_retention_period = "5"
final_snapshot_identifier = "final-db-snapshot-prod"
storage_encrypted = "true"
apply_immediately = "true"
monitoring_interval = "10"
cw_alarms = true
cw_sns_topic = "${aws_sns_topic.db_alarms.id}"
db_parameter_group_name = "${aws_db_parameter_group.aurora_db_57_parameter_group.id}"
db_cluster_parameter_group_name = "${aws_rds_cluster_parameter_group.aurora_57_cluster_parameter_group.id}"
iam_database_authentication_enabled = "true"
}

resource "aws_db_parameter_group" "aurora_db_57_parameter_group" {
Expand Down
45 changes: 23 additions & 22 deletions tests/terraform/test-postgres.tf
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Expand Up @@ -3,28 +3,29 @@ resource "aws_sns_topic" "db_alarms_postgres96" {
}

module "aurora_db_postgres96" {
source = "../.."
engine = "aurora-postgresql"
engine-version = "9.6.6"
name = "test-aurora-db-postgres96"
envname = "test-pg96"
envtype = "test"
subnets = ["${module.vpc.private_subnets}"]
azs = ["${module.vpc.availability_zones}"]
replica_count = "1"
security_groups = ["${aws_security_group.allow_all.id}"]
instance_type = "db.r4.large"
username = "root"
password = "changeme"
backup_retention_period = "5"
final_snapshot_identifier = "final-db-snapshot-prod"
storage_encrypted = "true"
apply_immediately = "true"
monitoring_interval = "10"
cw_alarms = true
cw_sns_topic = "${aws_sns_topic.db_alarms_postgres96.id}"
db_parameter_group_name = "${aws_db_parameter_group.aurora_db_postgres96_parameter_group.id}"
db_cluster_parameter_group_name = "${aws_rds_cluster_parameter_group.aurora_cluster_postgres96_parameter_group.id}"
source = "../.."
engine = "aurora-postgresql"
engine-version = "9.6.6"
name = "test-aurora-db-postgres96"
envname = "test-pg96"
envtype = "test"
subnets = ["${module.vpc.private_subnets}"]
azs = ["${module.vpc.availability_zones}"]
replica_count = "1"
security_groups = ["${aws_security_group.allow_all.id}"]
instance_type = "db.r4.large"
username = "root"
password = "changeme"
backup_retention_period = "5"
final_snapshot_identifier = "final-db-snapshot-prod"
storage_encrypted = "true"
apply_immediately = "true"
monitoring_interval = "10"
cw_alarms = true
cw_sns_topic = "${aws_sns_topic.db_alarms_postgres96.id}"
db_parameter_group_name = "${aws_db_parameter_group.aurora_db_postgres96_parameter_group.id}"
db_cluster_parameter_group_name = "${aws_rds_cluster_parameter_group.aurora_cluster_postgres96_parameter_group.id}"
iam_database_authentication_enabled = "false"
}

resource "aws_db_parameter_group" "aurora_db_postgres96_parameter_group" {
Expand Down
6 changes: 6 additions & 0 deletions variables.tf
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Expand Up @@ -223,3 +223,9 @@ variable "performance_insights_enabled" {
default = false
description = "Whether to enable Performance Insights"
}

variable "iam_database_authentication_enabled" {
type = "string"
default = false
description = "Whether to enable IAM database authentication for the RDS Cluster"
}

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