# Aurora postgres global cluster

**URL:** <https://discuss.hashicorp.com/t/aurora-postgres-global-cluster/50847>\
**Category:** AWS\
**Created:** [March 1, 2023, 5:32pm UTC](https://discuss.hashicorp.com/t/aurora-postgres-global-cluster/50847 "2023-03-01T17:32:56Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![dreamsofravi51](https://sea2.discourse-cdn.com/hashicorp/user_avatar/discuss.hashicorp.com/dreamsofravi51/32/25021_2.png) [@dreamsofravi51](https://discuss.hashicorp.com/u/dreamsofravi51)\
**Post date:** [March 1, 2023, 5:32pm UTC](https://discuss.hashicorp.com/t/aurora-postgres-global-cluster/50847/1 "2023-03-01T17:32:56Z")

</div>

iam seeing bellow error while creating global cluster

**module.aurora\_global.aws\_rds\_global\_cluster.global: Creating…** ╷ │ **Error:**  **error creating RDS Global Cluster: InvalidParameterCombination: When creating global cluster from existing db cluster, value for engineVersion should not be specified since it will be inherited from source cluster**  **│** status code: 400, request id: 2c159c59-7e8c-4bd4-bdfb-cca92f5f8a20 │ │ with module.aurora\_global.aws\_rds\_global\_cluster.global, │ on …/modules/database/rds/aurora\_global/main.tf line 3, in resource “aws\_rds\_global\_cluster” “global”: │ 3: resource “aws\_rds\_global\_cluster” “global” { │

Terraform version - 1.2.2  
AWS provider 4.13

code:

```auto
#Cluster Creation
resource "aws_rds_cluster" "aurora_cluster" {
  cluster_identifier = var.cluster_identifier
  database_name = var.database_name
  master_username = var.master_username
  master_password = var.master_password
  engine = var.engine
  global_cluster_identifier = var.global_cluster_identifier
  replication_source_identifier = var.replication_source_identifier
  source_region = var.source_region
  allow_major_version_upgrade = "true"
  iam_database_authentication_enabled = var.iam_database_authentication_enabled
  engine_version = var.engine == "aurora" ? var.mysql_version : var.postgre_version
  port = var.engine == "aurora" ? var.mysql_port : var.postgre_port
  backup_retention_period = var.backup_retention_period
  preferred_maintenance_window = var.cluster_preferred_maintenance_window
  preferred_backup_window = var.preferred_backup_window
  db_subnet_group_name = var.db_subnet_group_name
  db_cluster_parameter_group_name = var.db_cluster_parameter_group_name
  db_instance_parameter_group_name = var.db_cluster_parameter_group_name
  vpc_security_group_ids = var.securitygroup_id
  storage_encrypted = var.storage_encrypted
  apply_immediately = var.apply_immediately
  copy_tags_to_snapshot = "true"
  enabled_cloudwatch_logs_exports = ["postgresql"]
  kms_key_id = var.kms_key_id
  lifecycle {
    ignore_changes = [kms_key_id, master_password, source_region, replication_source_identifier, database_name, global_cluster_identifier]
  }
  skip_final_snapshot = var.skip_final_snapshot
  snapshot_identifier = var.snapshot_identifier
  deletion_protection = var.deletion_protection
  tags = merge(
    var.default_tags,
    {
      "name" = format("%s", var.cluster_identifier)
    },
  )
}

#Cluster Instance creation
resource "aws_rds_cluster_instance" "aurora_cluster_instance" {
  identifier = var.cluster_identifier
  engine = var.engine
  cluster_identifier = aws_rds_cluster.aurora_cluster.id
  instance_class = var.instance_class
  publicly_accessible = var.publicly_accessible
  db_parameter_group_name = var.db_parameter_group_name
  auto_minor_version_upgrade = var.auto_minor_version_upgrade
  monitoring_role_arn = "arn:aws:iam::${var.account_id}:role/${var.monitoring_role}"
  monitoring_interval = var.monitoring_interval
  ca_cert_identifier = var.ca_cert_identifier
  performance_insights_enabled = "true"
  preferred_maintenance_window = var.instance_preferred_maintenance_window
  performance_insights_kms_key_id = var.kms_key_id
  apply_immediately = var.apply_immediately
  lifecycle {
    ignore_changes = [performance_insights_kms_key_id, engine_version]
  }
  copy_tags_to_snapshot = "true"
  tags = merge(
    var.default_tags,
    {
      "name" = format("%s", var.cluster_identifier)
    },
  )
}

# Replica Resource
resource "aws_rds_cluster_instance" "aurora_cluster_replica" {
  count = var.enable_replica ? var.number_of_replicas : 0
  identifier = "${var.application_id}${var.cluster_subsysid}-${var.id_dbengine}${var.dbtype["id_dbtype.${var.engine}"]}-r${count.index + 1}${var.dbenv["id_dbenv.${var.environment}"]}"
  engine = var.engine
  cluster_identifier = aws_rds_cluster.aurora_cluster.id
  instance_class = var.instance_class
  publicly_accessible = "false"
  db_parameter_group_name = var.db_cluster_parameter_group_name
  auto_minor_version_upgrade = var.auto_minor_version_upgrade
  monitoring_role_arn = "arn:aws:iam::${var.account_id}:role/${var.monitoring_role}"
  monitoring_interval = var.monitoring_interval
  ca_cert_identifier = var.ca_cert_identifier
  performance_insights_enabled = "true"
  performance_insights_kms_key_id = var.kms_key_id
  apply_immediately = var.apply_immediately
  lifecycle {
    ignore_changes = [performance_insights_kms_key_id, engine_version]
  }
  preferred_maintenance_window = var.replica_preferred_maintenance_window
  copy_tags_to_snapshot = "true"
  tags = merge(
    var.default_tags,
    {
      "name" = "${var.application_id}${var.cluster_subsysid}-${var.id_dbengine}${var.dbtype["id_dbtype.${var.engine}"]}-r${count.index + 1}${var.dbenv["id_dbenv.${var.environment}"]}"
    },
  )
}

```

```auto

```

```auto

resource "aws_rds_global_cluster" "global" {
  global_cluster_identifier = "${var.global_cluster_identifier}"
  source_db_cluster_identifier = "${var.source_db_cluster_identifier}"
  force_destroy = "true"
  deletion_protection = "${var.deletion_protection}"
  engine_version = var.engine_version

  lifecycle {
    ignore_changes = [storage_encrypted]
  }
}

```