terraform variable using block with no argument - variables

Question

I have a sample code below from terraform but I'm having some issues trying to declare a variable that the argument is a block
basic {}
and moving to production will be something like
dedicated {
cku = 2
}
DEV
resource "confluent_kafka_cluster" "basic" {
display_name = "basic_kafka_cluster"
availability = "SINGLE_ZONE"
cloud = "GCP"
region = "us-central1"
basic {} <<<< # I want this block to be declared as variable
# Calling the variable
local.cluster_type["dev"] <<<< # this approach is not supported. how can I call the variable directly if there is no argument?
}
PROD
resource "confluent_kafka_cluster" "dedicated" {
display_name = "dedicated_kafka_cluster"
availability = "MULTI_ZONE"
cloud = "GCP"
region = "us-central1"
# For Production it is using a different block
dedicated {
cku = 2
}
# Calling the variable
local.cluster_type["prod"] <<<<< # this approach is not supported. how can I call the variable directly if there is no argument?
}
Local variables
locals {
cluster_type = {
prod = "dedicated {
cku = 2
}"
dev = "basic {}"
}
}

Answer 1

You have some issues with your script:
confluent_kafka_cluster is deprecated, it should be replaced by confluentcloud_kafka_cluster
To use the environment, you can create confluentcloud_environment:
resource "confluentcloud_environment" "env" {
display_name = var.environment
}
To solve the issue of the block, you can use dynamic with conditions, like this:
dynamic "basic" {
for_each = var.environment == "dev" ? [1] : []
content {}
}
dynamic "dedicated" {
for_each = var.environment == "prod" ? [1] : []
content {
cku = 2
}
}
Your code can be like this:
resource "confluentcloud_environment" "env" {
display_name = var.environment
}
resource "confluentcloud_kafka_cluster" "basic" {
display_name = "basic_kafka_cluster"
availability = "SINGLE_ZONE"
cloud = "GCP"
region = "us-central1"
dynamic "basic" {
for_each = var.environment == "dev" ? [1] : []
content {}
}
dynamic "dedicated" {
for_each = var.environment == "prod" ? [1] : []
content {
cku = 2
}
}
environment {
id = confluentcloud_environment.env.id
}
}
variable "environment" {
default = "dev"
}