Multi tool use

Clash Royale CLAN TAG

Terraform Module with Count Can't Have Duplicate Elements

Tricky one to explain in a title, or even form a question around it, so I'll start with some code (simplified for, err, simplicity):

resource "digitalocean_domain" "this_domain" {
name = "${var.domain}"
ip_address = "${var.main_ip}"
}

resource "digitalocean_record" "this_a_record" {
count = "${length(var.a_records)}"

domain = "${var.domain}"
type = "A"
name = "${element(keys(var.a_records), count.index)}"
value = "${lookup(var.a_records, element(keys(var.a_records), count.index))}"
}


Given the above being part of a module called dns, I can call it like this:

dns

module "example_com_dns" {
source = "./modules/dns"

domain = "example.com"
main_ip = "1.2.3.4"

a_records = {
"@" = "5.6.7.8"
"self" = "9.10.11.12"
"www" = "5.6.7.8"
}
}


Running this works as expected. I get the A records I expect; @, self, www, all pointing to the correct IPs.

A

However, it can't handle duplicate names. For example, putting in multiple @ records results in only one of them being written, I'm guessing because each iteration for the name simply overwrites the previous @ record.

@

@

Is there a way to have multiple duplicate names? i.e. In the example above, have something like:

....
"@" = "5.6.7.8"
"@" = "20.21.22.23"
"@" = "30.31.32.33"
"self" = "9.10.11.12"
"www" = 5.6.7.8"
...


1 Answer
1

In that case instead of using keys to get map keys you should put the A records into a list like:

a_records = [
["@" , "5.6.7.8"],
["@" , "7.6.7.8"],
["@" , "9.9.9.9"],
["self", "7.10.11.12"],
["self", "11.11.111.11"],
["self", "12.12.12.12"],
["self", "13.13.13.13"],
["www" , "14.14.14.14"]
]


and assign name and value as

name = "${element(var.a_records[count.index],0)}"
value = "${element(var.a_records[count.index],1)}"


and you will get all the duplicate A records that you want

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