Unable to configure Parameter Group for Neptune Cluster - amazon-web-services

Question

I am trying to create Neptune DB with terraform, but facing the following issue.
Please find the terraform script i am using.
## 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 = ["${aws_iam_role.NeptuneRole.arn}"]
}
resource "aws_neptune_cluster_instance" "gh-instance" {
count = 1
cluster_identifier = "${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}"]
}
I think i am not adding the parameter group to the Neptune DB and i am not sure how to do that.
I have tried the following keys in the terraform instance script.
db_parameter_group
parameter_group_name
But both are throwing error - 'This argument is not expected here'

Answer 1

According to the Official documentation the argument you are looking for is "neptune_cluster_parameter_group_name"
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 = ["${aws_iam_role.NeptuneRole.arn}"]
neptune_cluster_parameter_group_name = "${aws_neptune_cluster_parameter_group.neptune1.name}"
}