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main.tf
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main.tf
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module "final_snapshot_label" {
source = "cloudposse/label/null"
version = "0.24.1"
attributes = ["final", "snapshot"]
context = module.this.context
}
locals {
computed_major_engine_version = var.engine == "postgres" ? join(".", slice(split(".", var.engine_version), 0, 1)) : join(".", slice(split(".", var.engine_version), 0, 2))
major_engine_version = var.major_engine_version == "" ? local.computed_major_engine_version : var.major_engine_version
subnet_ids_provided = var.subnet_ids != null && length(var.subnet_ids) > 0
db_subnet_group_name_provided = var.db_subnet_group_name != null && var.db_subnet_group_name != ""
db_subnet_group_name = local.db_subnet_group_name_provided ? var.db_subnet_group_name : (
local.subnet_ids_provided ? join("", aws_db_subnet_group.default.*.name) : null
)
availability_zone = var.multi_az ? null : var.availability_zone
}
resource "aws_db_instance" "default" {
count = module.this.enabled ? 1 : 0
identifier = module.this.id
name = var.database_name
username = var.database_user
password = var.database_password
port = var.database_port
engine = var.engine
engine_version = var.engine_version
instance_class = var.instance_class
allocated_storage = var.allocated_storage
max_allocated_storage = var.max_allocated_storage
storage_encrypted = var.storage_encrypted
kms_key_id = var.kms_key_arn
vpc_security_group_ids = compact(
concat(
[join("", aws_security_group.default.*.id)],
var.associate_security_group_ids
)
)
db_subnet_group_name = local.db_subnet_group_name
availability_zone = local.availability_zone
ca_cert_identifier = var.ca_cert_identifier
parameter_group_name = length(var.parameter_group_name) > 0 ? var.parameter_group_name : join("", aws_db_parameter_group.default.*.name)
option_group_name = length(var.option_group_name) > 0 ? var.option_group_name : join("", aws_db_option_group.default.*.name)
license_model = var.license_model
multi_az = var.multi_az
storage_type = var.storage_type
iops = var.iops
publicly_accessible = var.publicly_accessible
snapshot_identifier = var.snapshot_identifier
allow_major_version_upgrade = var.allow_major_version_upgrade
auto_minor_version_upgrade = var.auto_minor_version_upgrade
apply_immediately = var.apply_immediately
maintenance_window = var.maintenance_window
skip_final_snapshot = var.skip_final_snapshot
copy_tags_to_snapshot = var.copy_tags_to_snapshot
backup_retention_period = var.backup_retention_period
backup_window = var.backup_window
tags = module.this.tags
deletion_protection = var.deletion_protection
final_snapshot_identifier = length(var.final_snapshot_identifier) > 0 ? var.final_snapshot_identifier : module.final_snapshot_label.id
iam_database_authentication_enabled = var.iam_database_authentication_enabled
enabled_cloudwatch_logs_exports = var.enabled_cloudwatch_logs_exports
performance_insights_enabled = var.performance_insights_enabled
performance_insights_kms_key_id = var.performance_insights_enabled ? var.performance_insights_kms_key_id : null
performance_insights_retention_period = var.performance_insights_enabled ? var.performance_insights_retention_period : null
monitoring_interval = var.monitoring_interval
monitoring_role_arn = var.monitoring_role_arn
depends_on = [
aws_db_subnet_group.default,
aws_security_group.default,
aws_db_parameter_group.default,
aws_db_option_group.default
]
lifecycle {
ignore_changes = [
snapshot_identifier, # if created from a snapshot, will be non-null at creation, but null afterwards
]
}
}
resource "aws_db_parameter_group" "default" {
count = length(var.parameter_group_name) == 0 && module.this.enabled ? 1 : 0
name_prefix = "${module.this.id}${module.this.delimiter}"
family = var.db_parameter_group
tags = module.this.tags
dynamic "parameter" {
for_each = var.db_parameter
content {
apply_method = lookup(parameter.value, "apply_method", null)
name = parameter.value.name
value = parameter.value.value
}
}
lifecycle {
create_before_destroy = true
}
}
resource "aws_db_option_group" "default" {
count = length(var.option_group_name) == 0 && module.this.enabled ? 1 : 0
name_prefix = "${module.this.id}${module.this.delimiter}"
engine_name = var.engine
major_engine_version = local.major_engine_version
tags = module.this.tags
dynamic "option" {
for_each = var.db_options
content {
db_security_group_memberships = lookup(option.value, "db_security_group_memberships", null)
option_name = option.value.option_name
port = lookup(option.value, "port", null)
version = lookup(option.value, "version", null)
vpc_security_group_memberships = lookup(option.value, "vpc_security_group_memberships", null)
dynamic "option_settings" {
for_each = lookup(option.value, "option_settings", [])
content {
name = option_settings.value.name
value = option_settings.value.value
}
}
}
}
lifecycle {
create_before_destroy = true
}
}
resource "aws_db_subnet_group" "default" {
count = module.this.enabled && local.subnet_ids_provided && ! local.db_subnet_group_name_provided ? 1 : 0
name = module.this.id
subnet_ids = var.subnet_ids
tags = module.this.tags
}
resource "aws_security_group" "default" {
count = module.this.enabled ? 1 : 0
name = module.this.id
description = "Allow inbound traffic from the security groups"
vpc_id = var.vpc_id
tags = module.this.tags
}
resource "aws_security_group_rule" "ingress_security_groups" {
count = module.this.enabled ? length(var.security_group_ids) : 0
description = "Allow inbound traffic from existing Security Groups"
type = "ingress"
from_port = var.database_port
to_port = var.database_port
protocol = "tcp"
source_security_group_id = var.security_group_ids[count.index]
security_group_id = join("", aws_security_group.default.*.id)
}
resource "aws_security_group_rule" "ingress_cidr_blocks" {
count = module.this.enabled && length(var.allowed_cidr_blocks) > 0 ? 1 : 0
description = "Allow inbound traffic from CIDR blocks"
type = "ingress"
from_port = var.database_port
to_port = var.database_port
protocol = "tcp"
cidr_blocks = var.allowed_cidr_blocks
security_group_id = join("", aws_security_group.default.*.id)
}
resource "aws_security_group_rule" "egress" {
count = module.this.enabled ? 1 : 0
description = "Allow all egress traffic"
type = "egress"
from_port = 0
to_port = 0
protocol = "-1"
cidr_blocks = ["0.0.0.0/0"]
security_group_id = join("", aws_security_group.default.*.id)
}
module "dns_host_name" {
source = "cloudposse/route53-cluster-hostname/aws"
version = "0.12.0"
enabled = length(var.dns_zone_id) > 0 && module.this.enabled
dns_name = var.host_name
zone_id = var.dns_zone_id
records = coalescelist(aws_db_instance.default.*.address, [""])
context = module.this.context
}