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Add DigitalOcean AAAA DNS records resolving to workers

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* Improve the workers "round-robin" DNS FQDN that is created
with each cluster by adding AAAA records
* CNAME's resolving to the DigitalOcean `workers_dns` output
can be followed to find a droplet's IPv4 or IPv6 address
* The CNI portmap plugin doesn't support IPv6. Hosting IPv6
apps is possible, but requires editing the nginx-ingress
addon with `hostNetwork: true`
This commit is contained in:
Dalton Hubble
2018-10-27 23:01:50 -07:00
parent 3bba1ba0dc
commit f034ef90ae
4 changed files with 26 additions and 5 deletions
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3
digital-ocean/container-linux/kubernetes/outputs.tf
View File

@ -3,7 +3,8 @@ output "controllers_dns" {
}
output "workers_dns" {
value = "${digitalocean_record.workers.0.fqdn}"
# Multiple A and AAAA records with the same FQDN
value = "${digitalocean_record.workers-record-a.0.fqdn}"
}
output "controllers_ipv4" {

14
digital-ocean/container-linux/kubernetes/workers.tf
View File

@ -1,5 +1,5 @@
# Worker DNS records
resource "digitalocean_record" "workers" {
resource "digitalocean_record" "workers-record-a" {
count = "${var.worker_count}"
# DNS zone where record should be created
@ -11,6 +11,18 @@ resource "digitalocean_record" "workers" {
value = "${element(digitalocean_droplet.workers.*.ipv4_address, count.index)}"
}
resource "digitalocean_record" "workers-record-aaaa" {
count = "${var.worker_count}"
# DNS zone where record should be created
domain = "${var.dns_zone}"
name = "${var.cluster_name}-workers"
type = "AAAA"
ttl = 300
value = "${element(digitalocean_droplet.workers.*.ipv6_address, count.index)}"
}
# Worker droplet instances
resource "digitalocean_droplet" "workers" {
count = "${var.worker_count}"