Terraform output object with multiple attributes for each of `for` resources? - for-loop

Question

I have terraform with a resource being created with for. As is typical, each instance of this resource has several attributes. At the moment I have a series of map outputs for this resource group but each consists of only a single key-value pair. I would like my terraform output to include a list or map of maps or objects with all of the attributes grouped by resource instance. How do I do this without using flatten; zipmap etc to construct them from my current outputs? This example is with aws_route53_record but this is a generic query:
Current code
output "r53record_zonal_fqdn" {
value = {
for entry in aws_route53_record.zonal :
entry.name => entry.fqdn
}
}
output "r53record_zonal_records" {
value = {
for entry in aws_route53_record.zonal :
entry.name => entry.records
}
}
output "r53record_zonal_zone_id" {
value = {
for entry in aws_route53_record.zonal :
entry.name => entry.zone_id
}
}
As you would expect, this renders three maps with aws_route53_record.zonal.name as the key and the other attribute(s) as the value.
What I would like is to have these outputs grouped by resource with a predefined key for each value, e.g. (pseudocode):
output "r53record_zonal_zone_id" {
value = {
for entry in aws_route53_record.zonal : {
instance[count.index] {
"name" = entry.name
"fqdn" = entry.fqdn
"records" = entry.records
"zone_id" = entry.zone_id
}
}
}
}
Producing a map or list of maps for each instance.
How can this or something like it be done?

Answer 1

I created a random route53_record resource block with two "name" arguments in for_each loop and tried to output something close to what you were looking for.
Assuming "mydomain.com" is the domain in Route53 as example....
resource "aws_route53_record" "zonal" {
for_each=toset(["site1","site2"])
name = each.key
zone_id = "ABCDZONEIDSTRING"
type = "A"
ttl = "300"
records = ["192.168.1.10"]
}
output "test" {
value = {
for dns, details in aws_route53_record.zonal:
dns => ({"fqdn" = details.fqdn , "zone_id" = details.zone_id , "records" = details.records})
}
}
this will create output in this fashion..
test = {
"site1" = {
"fqdn" = "site1.mydomain.com"
"records" = [
"192.168.1.10",
]
"zone_id" = "Z0630117NTQNSYTXYQ4Z"
}
"site2" = {
"fqdn" = "site2.mydomain.com"
"records" = [
"192.168.1.10",
]
"zone_id" = "Z0630117NTQNSYTXYQ4Z"
}
}
Suppose you passed the name values with domain name, like below...
for_each=toset(["site1.mydomain.com","site2.mydomain.com"])
the output would look like
test = {
"site1.mydomain.com" = {
"fqdn" = "site1.mydomain.com"
"records" = [
"192.168.1.10",
]
"zone_id" = "ABCDMYZONEIDSTRING"
}
"site2.mydomain.com" = {
"fqdn" = "site2.mydomain.com"
"records" = [
"192.168.1.10",
]
"zone_id" = "ABCDMYZONEIDSTRING"
}
}