Merge pull request #526 from abhinavdahiya/etcd_dns

Add SRV records for bootstrapping etcd using DNS.

data/data/aws/main.tf

@@ -117,6 +117,14 @@ resource "aws_route53_record" "etcd_a_nodes" {
   records = ["${module.masters.ip_addresses[count.index]}"]
 }
 
+resource "aws_route53_record" "etcd_cluster" {
+  type    = "SRV"
+  ttl     = "60"
+  zone_id = "${local.private_zone_id}"
+  name    = "_etcd-server-ssl._tcp"
+  records = ["${formatlist("0 10 2380 %s", aws_route53_record.etcd_a_nodes.*.fqdn)}"]
+}
+
 resource "aws_route53_zone" "tectonic_int" {
   count         = "${local.private_endpoints ? "${var.tectonic_aws_external_private_zone == "" ? 1 : 0 }" : 0}"
   vpc_id        = "${module.vpc.vpc_id}"

data/data/libvirt/main.tf

@@ -50,6 +50,10 @@ resource "libvirt_network" "tectonic_net" {
   dns = [{
     local_only = true
 
+    srvs = ["${flatten(list(
+      data.libvirt_network_dns_srv_template.etcd_cluster.*.rendered,
+    ))}"]
+
     hosts = ["${flatten(list(
       data.libvirt_network_dns_host_template.bootstrap.*.rendered,
       data.libvirt_network_dns_host_template.masters.*.rendered,
@@ -116,3 +120,13 @@ data "libvirt_network_dns_host_template" "workers" {
   ip       = "${var.tectonic_libvirt_worker_ips[count.index]}"
   hostname = "${var.tectonic_cluster_name}"
 }
+
+data "libvirt_network_dns_srv_template" "etcd_cluster" {
+  count    = "${var.tectonic_master_count}"
+  service  = "etcd-server-ssl"
+  protocol = "tcp"
+  domain   = "${var.tectonic_base_domain}"
+  port     = 2380
+  weight   = 10
+  target   = "${var.tectonic_cluster_name}-etcd-${count.index}.${var.tectonic_base_domain}"
+}

docs/dev/libvirt-howto.md

@@ -195,7 +195,7 @@ This step is optional, but useful for being able to resolve cluster-internal hos
 1. Make sure you have the `virsh` binary installed: `sudo dnf install libvirt-client libvirt-devel`
 2. Install the libvirt terraform provider:
 ```sh
-GOBIN=~/.terraform.d/plugins go get -u github.com/dmacvicar/terraform-provider-libvirt
+GOBIN=~/.terraform.d/plugins go get -u github.com/abhinavdahiya/terraform-provider-libvirt
 ```
 
 ### Cache Terrafrom plugins (optional, but makes subsequent runs a bit faster)