Terraform创建Neptune DB时无法配置集群参数组的问题求助

你的问题核心是搞混了Neptune参数组的关联层级：集群参数组（aws_neptune_cluster_parameter_group）需要关联到集群资源（aws_neptune_cluster），而不是集群实例（aws_neptune_cluster_instance），这就是你在实例里加参数报错的原因。

修改后的正确脚本 #

在aws_neptune_cluster资源中添加neptune_cluster_parameter_group_name参数，关联你创建的集群参数组：

## Create Neptune DB cluster and instance
resource "aws_neptune_cluster_parameter_group" "neptune1" {
  family      = "neptune1.2"
  name        = "neptune1"
  description = "neptune cluster parameter group"

  parameter {
    name         = "neptune_enable_audit_log"
    value        = 1
    apply_method = "pending-reboot"
  }
}

resource "aws_neptune_cluster" "gh-cluster" {
  cluster_identifier                  = "gh-db"
  skip_final_snapshot                 = true
  iam_database_authentication_enabled = false
  apply_immediately                   = true
  neptune_subnet_group_name           = aws_neptune_subnet_group.gh-dbg.name
  vpc_security_group_ids              = [aws_security_group.sgdb.id]
  iam_roles                           = [aws_iam_role.NeptuneRole.arn]
  # 关联集群参数组
  neptune_cluster_parameter_group_name = aws_neptune_cluster_parameter_group.neptune1.name
}

resource "aws_neptune_cluster_instance" "gh-instance" {
  count              = 1
  cluster_identifier = aws_neptune_cluster.gh-cluster.id
  engine             = "neptune"
  instance_class     = "db.r5.large"
  apply_immediately  = true
}

resource "aws_neptune_subnet_group" "gh-dbg" {
  name       = "gh-dbg"
  subnet_ids = [aws_subnet.private.id, aws_subnet.public.id]
}

额外说明 #

如果需要配置实例级别的参数（而非集群级），你需要创建aws_neptune_parameter_group资源，然后在aws_neptune_cluster_instance中通过neptune_parameter_group_name参数关联，但你的场景是集群参数组，所以只需要修改集群资源即可。

内容的提问来源于stack exchange，提问作者Akhil Chakicherla