Terraform - module input like variable - terraform

Question

I can use ad input of module like variable to tag volume? I've this block:
module "jenkins" {
source = "terraform-aws-modules/ec2-instance/aws"
version = "3.4.0"
name = "Jenkins"
ami = data.aws_ami.amazon_linux.id
instance_type = "t3.nano"
availability_zone = element(module.vpc.azs, 0)
subnet_id = element(module.vpc.public_subnets, 0)
vpc_security_group_ids = [module.jenkins-sg.security_group_id]
associate_public_ip_address = true
key_name = "my_key"
user_data = file("userdata/init.sh")
enable_volume_tags = false
root_block_device = [
{
encrypted = false
volume_type = "gp3"
volume_size = 15
throughput = 150
tags = {
Name = "${name}-root"
terraform = "true"
user_type = "ebs"
}
},
]
ebs_block_device = [
{
encrypted = false
device_name = "/dev/sdf"
volume_type = "gp3"
volume_size = 50
throughput = 150
}
]
volume_tags = {
Name = "${name}-data"
terraform = "true"
user_type = "ebs"
}
tags = {
terraform = "true"
user_type = "ec2"
}
}
As seen in "$ {name} -root" and "$ {name} -data", is it possible to tag with the input name "name"?
Thanks

Answer 1

You can't reference this module variable likes this. However, you can use a input variable (can be overridden from outside) or a local value (fixed value) to achieve this.
input variable
variable "ec2_instance_name" {
type = string
description = "The name of the ec2 instance"
default = "jenkins"
}
module "jenkins" {
source = "terraform-aws-modules/ec2-instance/aws"
version = "3.4.0"
name = var.ec2_instance_name
ami = data.aws_ami.amazon_linux.id
instance_type = "t3.nano"
availability_zone = element(module.vpc.azs, 0)
subnet_id = element(module.vpc.public_subnets, 0)
vpc_security_group_ids = [module.jenkins-sg.security_group_id]
associate_public_ip_address = true
key_name = "my_key"
user_data = file("userdata/init.sh")
enable_volume_tags = false
root_block_device = [
{
encrypted = false
volume_type = "gp3"
volume_size = 15
throughput = 150
tags = {
Name = "${var.ec2_instance_name}-root"
terraform = "true"
user_type = "ebs"
}
},
]
ebs_block_device = [
{
encrypted = false
device_name = "/dev/sdf"
volume_type = "gp3"
volume_size = 50
throughput = 150
}
]
volume_tags = {
Name = "${var.ec2_instance_name}-data"
terraform = "true"
user_type = "ebs"
}
tags = {
terraform = "true"
user_type = "ec2"
}
}
local value
locals {
ec2_instance_name = "jenkins"
}
module "jenkins" {
source = "terraform-aws-modules/ec2-instance/aws"
version = "3.4.0"
name = local.ec2_instance_name
ami = data.aws_ami.amazon_linux.id
instance_type = "t3.nano"
availability_zone = element(module.vpc.azs, 0)
subnet_id = element(module.vpc.public_subnets, 0)
vpc_security_group_ids = [module.jenkins-sg.security_group_id]
associate_public_ip_address = true
key_name = "my_key"
user_data = file("userdata/init.sh")
enable_volume_tags = false
root_block_device = [
{
encrypted = false
volume_type = "gp3"
volume_size = 15
throughput = 150
tags = {
Name = "${local.ec2_instance_name}-root"
terraform = "true"
user_type = "ebs"
}
},
]
ebs_block_device = [
{
encrypted = false
device_name = "/dev/sdf"
volume_type = "gp3"
volume_size = 50
throughput = 150
}
]
volume_tags = {
Name = "${local.ec2_instance_name}-data"
terraform = "true"
user_type = "ebs"
}
tags = {
terraform = "true"
user_type = "ec2"
}
}