feat: Rds read replica

modules/aws-rds-aurora/sql-server.tf

@@ -234,7 +234,7 @@ resource "aws_iam_role" "monitoring_role" {
 
 resource "aws_db_option_group" "this" {
   count                    = var.enable_custom_option_group ? 1 : 0
-  name                     = "${var.name}-option-group"
+  name                     = "${var.db_group_name}-option-group"
   option_group_description = "RDS SSRS and SSIS Option Group"
   engine_name              = var.engine
   major_engine_version     = var.option_group_engine_version
@@ -264,7 +264,7 @@ resource "aws_db_option_group" "this" {
 
 resource "aws_db_parameter_group" "sql_server" {
   count  = var.enable_custom_parameter_group ? 1 : 0
-  name   = "${var.name}-paramater-group"
+  name   = "${var.db_group_name}-paramater-group"
   family = var.db_parameter_group_family
 
   dynamic "parameter" {
@@ -358,9 +358,20 @@ resource "aws_db_instance" "rds_sql_server_read_replica" {
   kms_key_id           = var.kms_key_id
   parameter_group_name = var.custom_db_paramater_group_name
 
+
+  domain_ou              = var.ad_domain_ou
+  domain_fqdn            = var.ad_domain_fqdn
+  domain_dns_ips         = var.ad_domain_dns_ips
+  domain_auth_secret_arn = var.ad_domain_auth_secret_arn
+
   storage_type      = var.storage_type
   storage_encrypted = var.storage_encrypted
 
+  monitoring_interval             = 60
+  monitoring_role_arn             = aws_iam_role.monitoring_role[0].arn
+  performance_insights_enabled    = true
+  enabled_cloudwatch_logs_exports = ["error"]
+
   vpc_security_group_ids = compact(concat([try(aws_security_group.this[0].id, "")], var.vpc_security_group_ids))
 
   replicate_source_db = element(aws_db_instance.rds_sql_server[*].identifier, 0)

modules/aws-rds-aurora/variables.tf

@@ -540,6 +540,11 @@ variable "ad_domain_auth_secret_arn" {
   description = "AD Domain Secret ARN for RDS SQL Server"
 }
 
+variable "db_group_name" {
+  type        = string
+  description = "DB parameter and option group name prefix"
+}
+
 variable "option_group" {
   type = list(object({
     option_name = string

modules/aws-rds-sql-server-read-replica/sql-server.tf

@@ -0,0 +1,187 @@
+
+locals {
+  port = coalesce(var.port, (var.engine == "aurora-postgresql" ? 5432 : 1433))
+}
+
+
+
+################################################################################
+# Security Group
+################################################################################
+
+resource "aws_security_group" "this" {
+  count = var.create_security_group ? 1 : 0
+
+  name        = var.security_group_use_name_prefix ? null : var.name
+  name_prefix = var.security_group_use_name_prefix ? "${var.name}-sql-server" : null
+  vpc_id      = var.vpc_id
+  description = coalesce(var.security_group_description, "Control traffic to/from RDS Aurora ${var.name}")
+
+  tags = merge(var.tags, var.security_group_tags, { Name = var.name })
+
+  lifecycle {
+    create_before_destroy = true
+  }
+}
+
+# TODO - change to map of ingress rules under one resource at next breaking change
+resource "aws_security_group_rule" "default_ingress" {
+  count = var.create_security_group ? length(var.allowed_security_groups) : 0
+
+  description = "From allowed SGs"
+
+  type                     = "ingress"
+  from_port                = local.port
+  to_port                  = local.port
+  protocol                 = "tcp"
+  source_security_group_id = element(var.allowed_security_groups, count.index)
+  security_group_id        = aws_security_group.this[0].id
+}
+
+# TODO - change to map of ingress rules under one resource at next breaking change
+resource "aws_security_group_rule" "cidr_ingress" {
+  count = var.create_security_group && length(var.allowed_cidr_blocks) > 0 ? 1 : 0
+
+  description = "From allowed CIDRs"
+
+  type              = "ingress"
+  from_port         = local.port
+  to_port           = local.port
+  protocol          = "tcp"
+  cidr_blocks       = var.allowed_cidr_blocks
+  security_group_id = aws_security_group.this[0].id
+}
+
+resource "aws_security_group_rule" "egress" {
+  for_each = var.create_security_group ? var.security_group_egress_rules : {}
+
+  # required
+  type              = "egress"
+  from_port         = try(each.value.from_port, local.port)
+  to_port           = try(each.value.to_port, local.port)
+  protocol          = try(each.value.protocol, null)
+  security_group_id = aws_security_group.this[0].id
+
+  # optional
+  cidr_blocks              = try(each.value.cidr_blocks, null)
+  description              = try(each.value.description, null)
+  ipv6_cidr_blocks         = try(each.value.ipv6_cidr_blocks, null)
+  prefix_list_ids          = try(each.value.prefix_list_ids, null)
+  source_security_group_id = try(each.value.source_security_group_id, null)
+}
+
+
+#############################
+# Amazon RDS for SQL Server #
+#############################
+
+data "aws_iam_policy_document" "assume_role" {
+  statement {
+    effect = "Allow"
+
+    principals {
+      type        = "Service"
+      identifiers = ["ec2.amazonaws.com", "monitoring.rds.amazonaws.com"]
+    }
+
+    actions = ["sts:AssumeRole"]
+  }
+}
+
+resource "aws_iam_role" "monitoring_role" {
+  name                = "${var.name}-monitoring-role"
+  assume_role_policy  = data.aws_iam_policy_document.assume_role.json
+  managed_policy_arns = ["arn:aws:iam::aws:policy/service-role/AmazonRDSEnhancedMonitoringRole"]
+}
+
+
+resource "aws_db_option_group" "this" {
+  count                    = var.enable_custom_option_group ? 1 : 0
+  name                     = "${var.db_group_name}-option-group"
+  option_group_description = "RDS SSRS and SSIS Option Group"
+  engine_name              = var.engine
+  major_engine_version     = var.option_group_engine_version
+
+  option {
+    option_name = var.option_name
+  }
+
+  dynamic "option" {
+    for_each = var.enable_custom_option_group ? var.option_group : []
+
+    content {
+      option_name                    = option.value.option_name
+      vpc_security_group_memberships = var.allowed_security_groups
+      #db_security_group_memberships  = var.allowed_security_groups
+      dynamic "option_settings" {
+        for_each = can(option.value.option_rule_names[*]) ? option.value.option_rule_names : null
+        content {
+          name  = option_settings.value.rule_name
+          value = option_settings.value.option_rule_value
+        }
+      }
+    }
+  }
+}
+
+
+resource "aws_db_parameter_group" "sql_server" {
+  count  = var.enable_custom_parameter_group ? 1 : 0
+  name   = "${var.db_group_name}-paramater-group"
+  family = var.db_parameter_group_family
+
+  dynamic "parameter" {
+    for_each = var.enable_custom_parameter_group ? var.parameter_group : []
+    content {
+      name         = parameter.value.parameter_name
+      value        = parameter.value.parameter_value
+      apply_method = parameter.value.parameter_apply_method
+    }
+  }
+}
+
+resource "aws_db_instance" "rds_sql_server_read_replica" {
+
+  engine         = var.engine
+  engine_version = var.engine_version
+  port           = 1433
+
+  identifier = var.instances_use_identifier_prefix ? null : "${var.name}-sql-server"
+
+  allow_major_version_upgrade = var.allow_major_version_upgrade
+  apply_immediately           = var.apply_immediately
+
+
+  maintenance_window  = var.preferred_maintenance_window
+  deletion_protection = var.deletion_protection
+
+  copy_tags_to_snapshot = true
+  skip_final_snapshot   = var.skip_final_snapshot
+
+  instance_class       = var.instance_class
+  kms_key_id           = var.kms_key_id
+  parameter_group_name = var.enable_custom_parameter_group ? aws_db_parameter_group.sql_server[0].name : var.db_parameter_group_name
+  option_group_name    = var.enable_custom_option_group ? aws_db_option_group.this[0].name : var.db_parameter_group_name
+
+  storage_type          = var.storage_type
+  storage_encrypted     = var.storage_encrypted
+  max_allocated_storage = var.max_allocated_storage
+
+  monitoring_interval             = 60
+  monitoring_role_arn             = aws_iam_role.monitoring_role.arn
+  performance_insights_enabled    = true
+  enabled_cloudwatch_logs_exports = ["error"]
+
+
+
+  vpc_security_group_ids = compact(concat([try(aws_security_group.this[0].id, "")], var.vpc_security_group_ids))
+
+  replicate_source_db = var.replication_source_identifier
+
+  timeouts {
+    create = "80m"
+  }
+
+  tags       = var.tags
+}
+