CODEWITHSUNDEEP
amazon-web-servicesssldnsterraformamazon-certificate-manager
Mornor
Mornor

Reputation: 3783

ACM certificates cross account DNS validation

I have 2 AWS accounts: dev and prod.

In the prod account, I setup a DNS domain (example.com), as well as 2 public Hosted Zone: example.com and prod.example.com. 2 ACM certificates are also issued for these domains internal.prod.example.com and eks.prod.example.com. Those certificates are correctly validated by DNS.

In the dev account, I have created 2 public Hosted Zones: dev.example.com and example.com. I issued 2 ACM certificates for internal.dev.example.com and eks.dev.example.com which, as far as I understand need to be validated with the DNS in the prod account.

These certificated are in pending state.

How can I validate them?

What I did so far:

The following code is how it's been done (and working) on the prod account.

Note - this is a code that I took over, so I'm not aware if any manual steps have been taken.

data "aws_route53_zone" "dns-zone" {
  name = "${var.environment}.${var.zone_name}"
}

resource "aws_acm_certificate" "cert" {
  domain_name       = "*.${var.environment}.${var.zone_name}"
  validation_method = "DNS"
  subject_alternative_names = list("*.internal.${var.environment}.${var.zone_name}", "*.eks.${var.environment}.${var.zone_name}")

  lifecycle {
    create_before_destroy = true
    prevent_destroy = true
  }
}

resource "aws_route53_record" "cert_validation" {
  for_each = {
    for dvo in aws_acm_certificate.cert.domain_validation_options : dvo.domain_name => {
      name    = dvo.resource_record_name
      record  = dvo.resource_record_value
      type    = dvo.resource_record_type
      zone_id = data.aws_route53_zone.dns-zone.zone_id
    }
  }

  allow_overwrite = true
  name            = each.value.name
  records         = [each.value.record]
  ttl             = 60
  type            = each.value.type
  zone_id         = each.value.zone_id
}


resource "aws_acm_certificate_validation" "cert" {
  certificate_arn         = aws_acm_certificate.cert.arn
  validation_record_fqdns = [for record in aws_route53_record.cert_validation : record.fqdn]
}

Ps - Should you need more clarification, please let me know.

Upvotes: 0

Views: 2582

Answers (1)

paulg
paulg

Reputation: 728

dev & prod account you have example.com? Only 1 can be used properly. Wherever the registrar is for example.com ... that registrar can only use the name servers from 1 of those hosted zones.

You mentioned you have 2 ACM certs for internal.dev.example.com & eks.dev.example.com ... those should be validated in the DEV Account if that's where their domains are created.

Also I recommend you just create 1 wild card cert in ACM for *.dev.example.com & validate that 1 in the DEV account. Any subdomains such as eks.dev.example.com will be able to use it.

Upvotes: 1

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