Add Multi-AZ option

README.md

@@ -233,6 +233,7 @@ Available targets:
 | label\_order | The naming order of the id output and Name tag.<br>Defaults to ["namespace", "environment", "stage", "name", "attributes"].<br>You can omit any of the 5 elements, but at least one must be present. | `list(string)` | `null` | no |
 | label\_value\_case | The letter case of output label values (also used in `tags` and `id`).<br>Possible values: `lower`, `title`, `upper` and `none` (no transformation).<br>Default value: `lower`. | `string` | `null` | no |
 | maintenance\_window | Maintenance window | `string` | `"wed:03:00-wed:04:00"` | no |
+| multi\_az\_enabled | Multi AZ (Automatic Failover must also be enabled.  If Cluster Mode is enabled, Multi AZ is on by default, and this setting is ignored) | `bool` | `false` | no |
 | name | Solution name, e.g. 'app' or 'jenkins' | `string` | `null` | no |
 | namespace | Namespace, which could be your organization name or abbreviation, e.g. 'eg' or 'cp' | `string` | `null` | no |
 | notification\_topic\_arn | Notification topic arn | `string` | `""` | no |

docs/terraform.md

@@ -51,6 +51,7 @@
 | label\_order | The naming order of the id output and Name tag.<br>Defaults to ["namespace", "environment", "stage", "name", "attributes"].<br>You can omit any of the 5 elements, but at least one must be present. | `list(string)` | `null` | no |
 | label\_value\_case | The letter case of output label values (also used in `tags` and `id`).<br>Possible values: `lower`, `title`, `upper` and `none` (no transformation).<br>Default value: `lower`. | `string` | `null` | no |
 | maintenance\_window | Maintenance window | `string` | `"wed:03:00-wed:04:00"` | no |
+| multi\_az\_enabled | Multi AZ (Automatic Failover must also be enabled.  If Cluster Mode is enabled, Multi AZ is on by default, and this setting is ignored) | `bool` | `false` | no |
 | name | Solution name, e.g. 'app' or 'jenkins' | `string` | `null` | no |
 | namespace | Namespace, which could be your organization name or abbreviation, e.g. 'eg' or 'cp' | `string` | `null` | no |
 | notification\_topic\_arn | Notification topic arn | `string` | `""` | no |

main.tf

@@ -88,6 +88,7 @@ resource "aws_elasticache_replication_group" "default" {
   parameter_group_name          = join("", aws_elasticache_parameter_group.default.*.name)
   availability_zones            = var.cluster_mode_enabled ? null : slice(var.availability_zones, 0, var.cluster_size)
   automatic_failover_enabled    = var.automatic_failover_enabled
+  multi_az_enabled              = var.multi_az_enabled
   subnet_group_name             = local.elasticache_subnet_group_name
   security_group_ids            = var.use_existing_security_groups ? var.existing_security_groups : [join("", aws_security_group.default.*.id)]
   maintenance_window            = var.maintenance_window

variables.tf

@@ -139,6 +139,12 @@ variable "automatic_failover_enabled" {
   description = "Automatic failover (Not available for T1/T2 instances)"
 }
 
+variable "multi_az_enabled" {
+  type        = bool
+  default     = false
+  description = "Multi AZ (Automatic Failover must also be enabled.  If Cluster Mode is enabled, Multi AZ is on by default, and this setting is ignored)"
+}
+
 variable "availability_zones" {
   type        = list(string)
   description = "Availability zone IDs"