feat: expose distribution_policy_target_shape setting for MIGs (#327)

autogen/main.tf.tmpl

@@ -103,7 +103,8 @@ resource "google_compute_region_instance_group_manager" "{{ module_name }}" {
     }
   }
 
-  distribution_policy_zones = local.distribution_policy_zones
+  distribution_policy_target_shape = var.distribution_policy_target_shape
+  distribution_policy_zones        = local.distribution_policy_zones
   dynamic "update_policy" {
     for_each = var.update_policy
     content {

autogen/variables.tf.tmpl

@@ -74,6 +74,12 @@ variable "target_pools" {
   default     = []
 }
 
+variable "distribution_policy_target_shape" {
+  description = "MIG target distribution shape (EVEN, BALANCED, ANY, ANY_SINGLE_ZONE)"
+  type        = string
+  default     = null
+}
+
 variable "distribution_policy_zones" {
   description = "The distribution policy, i.e. which zone(s) should instances be create in. Default is all zones in given region."
   type        = list(string)

modules/mig/README.md

@@ -26,6 +26,7 @@ The current version is 2.X. The following guides are available to assist with up
 | autoscaling\_mode | Operating mode of the autoscaling policy. If omitted, the default value is ON. https://registry.terraform.io/providers/hashicorp/google/latest/docs/resources/compute_autoscaler#mode | `string` | `null` | no |
 | autoscaling\_scale\_in\_control | Autoscaling, scale-in control block. https://www.terraform.io/docs/providers/google/r/compute_autoscaler#scale_in_control | <pre>object({<br>    fixed_replicas   = number<br>    percent_replicas = number<br>    time_window_sec  = number<br>  })</pre> | <pre>{<br>  "fixed_replicas": null,<br>  "percent_replicas": null,<br>  "time_window_sec": null<br>}</pre> | no |
 | cooldown\_period | The number of seconds that the autoscaler should wait before it starts collecting information from a new instance. | `number` | `60` | no |
+| distribution\_policy\_target\_shape | MIG target distribution shape (EVEN, BALANCED, ANY, ANY\_SINGLE\_ZONE) | `string` | `null` | no |
 | distribution\_policy\_zones | The distribution policy, i.e. which zone(s) should instances be create in. Default is all zones in given region. | `list(string)` | `[]` | no |
 | health\_check | Health check to determine whether instances are responsive and able to do work | <pre>object({<br>    type                = string<br>    initial_delay_sec   = number<br>    check_interval_sec  = number<br>    healthy_threshold   = number<br>    timeout_sec         = number<br>    unhealthy_threshold = number<br>    response            = string<br>    proxy_header        = string<br>    port                = number<br>    request             = string<br>    request_path        = string<br>    host                = string<br>    enable_logging      = bool<br>  })</pre> | <pre>{<br>  "check_interval_sec": 30,<br>  "enable_logging": false,<br>  "healthy_threshold": 1,<br>  "host": "",<br>  "initial_delay_sec": 30,<br>  "port": 80,<br>  "proxy_header": "NONE",<br>  "request": "",<br>  "request_path": "/",<br>  "response": "",<br>  "timeout_sec": 10,<br>  "type": "",<br>  "unhealthy_threshold": 5<br>}</pre> | no |
 | health\_check\_name | Health check name. When variable is empty, name will be derived from var.hostname. | `string` | `""` | no |

modules/mig/main.tf

@@ -87,7 +87,8 @@ resource "google_compute_region_instance_group_manager" "mig" {
     }
   }
 
-  distribution_policy_zones = local.distribution_policy_zones
+  distribution_policy_target_shape = var.distribution_policy_target_shape
+  distribution_policy_zones        = local.distribution_policy_zones
   dynamic "update_policy" {
     for_each = var.update_policy
     content {

modules/mig/variables.tf

@@ -56,6 +56,12 @@ variable "target_pools" {
   default     = []
 }
 
+variable "distribution_policy_target_shape" {
+  description = "MIG target distribution shape (EVEN, BALANCED, ANY, ANY_SINGLE_ZONE)"
+  type        = string
+  default     = null
+}
+
 variable "distribution_policy_zones" {
   description = "The distribution policy, i.e. which zone(s) should instances be create in. Default is all zones in given region."
   type        = list(string)

modules/mig_with_percent/README.md

@@ -25,6 +25,7 @@ The current version is 2.X. The following guides are available to assist with up
 | autoscaling\_mode | Operating mode of the autoscaling policy. If omitted, the default value is ON. https://registry.terraform.io/providers/hashicorp/google/latest/docs/resources/compute_autoscaler#mode | `string` | `null` | no |
 | autoscaling\_scale\_in\_control | Autoscaling, scale-in control block. https://www.terraform.io/docs/providers/google/r/compute_autoscaler#scale_in_control | <pre>object({<br>    fixed_replicas   = number<br>    percent_replicas = number<br>    time_window_sec  = number<br>  })</pre> | <pre>{<br>  "fixed_replicas": null,<br>  "percent_replicas": null,<br>  "time_window_sec": null<br>}</pre> | no |
 | cooldown\_period | The number of seconds that the autoscaler should wait before it starts collecting information from a new instance. | `number` | `60` | no |
+| distribution\_policy\_target\_shape | MIG target distribution shape (EVEN, BALANCED, ANY, ANY\_SINGLE\_ZONE) | `string` | `null` | no |
 | distribution\_policy\_zones | The distribution policy, i.e. which zone(s) should instances be create in. Default is all zones in given region. | `list(string)` | `[]` | no |
 | health\_check | Health check to determine whether instances are responsive and able to do work | <pre>object({<br>    type                = string<br>    initial_delay_sec   = number<br>    check_interval_sec  = number<br>    healthy_threshold   = number<br>    timeout_sec         = number<br>    unhealthy_threshold = number<br>    response            = string<br>    proxy_header        = string<br>    port                = number<br>    request             = string<br>    request_path        = string<br>    host                = string<br>    enable_logging      = bool<br>  })</pre> | <pre>{<br>  "check_interval_sec": 30,<br>  "enable_logging": false,<br>  "healthy_threshold": 1,<br>  "host": "",<br>  "initial_delay_sec": 30,<br>  "port": 80,<br>  "proxy_header": "NONE",<br>  "request": "",<br>  "request_path": "/",<br>  "response": "",<br>  "timeout_sec": 10,<br>  "type": "",<br>  "unhealthy_threshold": 5<br>}</pre> | no |
 | health\_check\_name | Health check name. When variable is empty, name will be derived from var.hostname. | `string` | `""` | no |

modules/mig_with_percent/main.tf

@@ -96,7 +96,8 @@ resource "google_compute_region_instance_group_manager" "mig_with_percent" {
     }
   }
 
-  distribution_policy_zones = local.distribution_policy_zones
+  distribution_policy_target_shape = var.distribution_policy_target_shape
+  distribution_policy_zones        = local.distribution_policy_zones
   dynamic "update_policy" {
     for_each = var.update_policy
     content {

modules/mig_with_percent/variables.tf

@@ -66,6 +66,12 @@ variable "target_pools" {
   default     = []
 }
 
+variable "distribution_policy_target_shape" {
+  description = "MIG target distribution shape (EVEN, BALANCED, ANY, ANY_SINGLE_ZONE)"
+  type        = string
+  default     = null
+}
+
 variable "distribution_policy_zones" {
   description = "The distribution policy, i.e. which zone(s) should instances be create in. Default is all zones in given region."
   type        = list(string)