Terraform, create map where list elements are values - list

Question

I am trying to parse this variable in terraform. The main goal is to create map of "group" = "member" type. Did i set type in variable correct? Required output provided below.
variable "iam" "this"{
type = map(map(list(string)))
default = {
"admins" = {
"user" = [
"oleh_mykolaishyn#gmail.com",
"yevhen_plaksa#gmail.com"
]
"service_principal" = [
"dpaf2-dev-sa"
]
}
"dev" = {
"user" = [
"oleh_mykolaishyn#gmail.com",
"yevhen_plaksa#gmail.com"
]
"service_principal" = []
}
"ops" = {
"user" = [
"oleksandr_gorkun#gmail.com",
]
"service_principal" = [
"dpaf2-dev-sa",
"dpaf2-iacda-app-id",
]
}
}
}
Required output:
{
"admins" = "oleh_mykolaishyn#gmail.com"
"admins" = "yevhen_plaksa#gmail.com"
"admins" = "dpaf2-dev-sa"
"dev" = "oleh_mykolaishyn#gmail.com"
"dev" = "yevhen_plaksa#gmail.com"
"ops" = "oleksandr_gorkun#gmail.com"
"ops" = "dpaf2-dev-sa"
"ops" = "dpaf2-iacda-app-id"
}

Answer 1

Start with this and manipulate it to suit your exact needs. There are many ways to structure resources using maps, arrays and nesting.
locals {
service_principal = {
admin = ["dpaf2-dev-sa"]
dev = []
ops = [
"dpaf2-dev-sa",
"dpaf2-iacda-app-id",
]
}
users = {
admin = [
"oleh_mykolaishyn#gmail.com",
"yevhen_plaksa#gmail.com"
]
dev = [
"yevhen_plaksa#gmail.com"
]
ops = [
"oleksandr_gorkun#gmail.com"
]
}
result = flatten([for role in keys(local.users) : [for user in local.users[role] :
{ role = role, user = user, principals = local.service_principal[role] }]])
}
resource "null_resource" "users" {
count = length(local.result)
provisioner "local-exec" {
command = "echo user: $USER has role: $ROLE and principals: $SERVICE_PRINCIPAL >> ouput.txt"
environment = {
USER = local.result[count.index].user
ROLE = local.result[count.index].role
SERVICE_PRINCIPAL = join(", ", local.result[count.index].principals)
}
}
}
If you run:
terraform init
terraform plan
terraform apply --auto-approve
Then check your directory for a file named output.txt which will contain
user:oleh_mykolaishyn#gmail.com has role:admin and principals: dpaf2-dev-sa
user:yevhen_plaksa#gmail.com has role:dev and principals:
user:oleksandr_gorkun#gmail.com has role:ops and principals: dpaf2-dev-sa, dpaf2-iacda-app-id
user:yevhen_plaksa#gmail.com has role:admin and principals: dpaf2-dev-sa
I know the text file isn't your desired output but the loop is just a demonstration of how you can iterate over the local variable.
Again, many ways to sort and slice it. I avoided your desired output because maps cannot have duplicate keys so it'll never work.
If you want to see the result in isolation you can do:
terraform console
local.result
And it will appear in the terminal. To exit the console type exit.