Support 3 AZs for Terraform 0.11 (#29)

* Support 3AZ

* make docs

Co-authored-by: Maxim Mironenko <simixido@gmail.com>

Author: pkoraca

README.md

@@ -149,6 +149,7 @@ Available targets:
 | allowed_cidr_blocks | List of CIDR blocks to be allowed to connect to the cluster | list | `<list>` | no |
 | attributes | Additional attributes (e.g. `1`) | list | `<list>` | no |
 | automated_snapshot_start_hour | Hour at which automated snapshots are taken, in UTC | string | `0` | no |
+| availability_zone_count | Number of Availability Zones for the domain to use. | string | `3` | no |
 | create_iam_service_linked_role | Whether to create `AWSServiceRoleForAmazonElasticsearchService` service-linked role. Set it to `false` if you already have an ElasticSearch cluster created in the AWS account and AWSServiceRoleForAmazonElasticsearchService already exists. See https://github.com/terraform-providers/terraform-provider-aws/issues/5218 for more info | string | `true` | no |
 | dedicated_master_count | Number of dedicated master nodes in the cluster | string | `0` | no |
 | dedicated_master_enabled | Indicates whether dedicated master nodes are enabled for the cluster | string | `false` | no |
@@ -352,6 +353,7 @@ Check out [our other projects][github], [follow us on twitter][twitter], [apply
   [sarkis_homepage]: https://github.com/sarkis
   [sarkis_avatar]: https://img.cloudposse.com/150x150/https://github.com/sarkis.png
 
+
 [![README Footer][readme_footer_img]][readme_footer_link]
 [![Beacon][beacon]][website]
 

docs/terraform.md

@@ -6,6 +6,7 @@
 | allowed_cidr_blocks | List of CIDR blocks to be allowed to connect to the cluster | list | `<list>` | no |
 | attributes | Additional attributes (e.g. `1`) | list | `<list>` | no |
 | automated_snapshot_start_hour | Hour at which automated snapshots are taken, in UTC | string | `0` | no |
+| availability_zone_count | Number of Availability Zones for the domain to use. | string | `3` | no |
 | create_iam_service_linked_role | Whether to create `AWSServiceRoleForAmazonElasticsearchService` service-linked role. Set it to `false` if you already have an ElasticSearch cluster created in the AWS account and AWSServiceRoleForAmazonElasticsearchService already exists. See https://github.com/terraform-providers/terraform-provider-aws/issues/5218 for more info | string | `true` | no |
 | dedicated_master_count | Number of dedicated master nodes in the cluster | string | `0` | no |
 | dedicated_master_enabled | Indicates whether dedicated master nodes are enabled for the cluster | string | `false` | no |

main.tf

@@ -1,5 +1,5 @@
 module "label" {
-  source     = "git::https://github.com/cloudposse/terraform-null-label.git?ref=tags/0.5.3"
+  source     = "git::https://github.com/cloudposse/terraform-null-label.git?ref=tags/0.7.0"
   enabled    = "${var.enabled}"
   namespace  = "${var.namespace}"
   name       = "${var.name}"
@@ -10,7 +10,7 @@ module "label" {
 }
 
 module "user_label" {
-  source     = "git::https://github.com/cloudposse/terraform-null-label.git?ref=tags/0.5.3"
+  source     = "git::https://github.com/cloudposse/terraform-null-label.git?ref=tags/0.7.0"
   enabled    = "${var.enabled}"
   namespace  = "${var.namespace}"
   name       = "${var.name}"
@@ -127,6 +127,10 @@ resource "aws_elasticsearch_domain" "default" {
     dedicated_master_count   = "${var.dedicated_master_count}"
     dedicated_master_type    = "${var.dedicated_master_type}"
     zone_awareness_enabled   = "${var.zone_awareness_enabled}"
+
+    zone_awareness_config {
+      availability_zone_count = "${var.availability_zone_count}"
+    }
   }
 
   node_to_node_encryption {

variables.tf

@@ -216,6 +216,12 @@ variable "node_to_node_encryption_enabled" {
   description = "Whether to enable node-to-node encryption"
 }
 
+variable "availability_zone_count" {
+  type        = "string"
+  default     = "3"
+  description = "Number of Availability Zones for the domain to use."
+}
+
 variable "iam_role_max_session_duration" {
   default     = 3600
   description = "The maximum session duration (in seconds) for the user role. Can have a value from 1 hour to 12 hours"