gke: add default_compute_class_enabled flag (#1182)

This is related to
https://registry.terraform.io/providers/hashicorp/google/latest/docs/resources/container_cluster#default_compute_class_enabled-1.

More info:
https://docs.cloud.google.com/kubernetes-engine/docs/reference/crds/computeclass#nodepoolconfig

We want to use the this variable on our GKE cluster on the ecosystems
clusters.

Signed-off-by: Hector Fernandez <[email protected]>

Author: hectorj2f

modules/gke/README.md

@@ -35,6 +35,7 @@ No modules.
 | <a name="input_cluster_autoscaling_memory_limits"></a> [cluster\_autoscaling\_memory\_limits](#input\_cluster\_autoscaling\_memory\_limits) | Cluster autoscaling memory limits | <pre>object({<br/>    resource_type = optional(string, "memory"),<br/>    minimum       = optional(number, 8)<br/>    maximum       = optional(number, 80)<br/>  })</pre> | `null` | no |
 | <a name="input_cluster_autoscaling_profile"></a> [cluster\_autoscaling\_profile](#input\_cluster\_autoscaling\_profile) | Cluster autoscaling profile | `string` | `null` | no |
 | <a name="input_cluster_autoscaling_provisioning_defaults"></a> [cluster\_autoscaling\_provisioning\_defaults](#input\_cluster\_autoscaling\_provisioning\_defaults) | Cluster autoscaling provisioning defaults | <pre>object({<br/>    disk_size = optional(number, null)<br/>    disk_type = optional(string, null)<br/>    shielded_instance_config = optional(object({<br/>      enable_secure_boot          = optional(bool, null)<br/>      enable_integrity_monitoring = optional(bool, null)<br/>    }), null)<br/>    management = optional(object({<br/>      auto_upgrade = optional(bool, null)<br/>      auto_repair  = optional(bool, null)<br/>    }), null)<br/>  })</pre> | `null` | no |
+| <a name="input_default_compute_class_enabled"></a> [default\_compute\_class\_enabled](#input\_default\_compute\_class\_enabled) | Specifies whether default compute class behavior is enabled. If enabled, cluster autoscaler will use Compute Class with name default for all the workloads, if not overridden. | `bool` | `false` | no |
 | <a name="input_deletion_protection"></a> [deletion\_protection](#input\_deletion\_protection) | Toggle to prevent accidental deletion of resources. | `bool` | `true` | no |
 | <a name="input_enable_private_nodes"></a> [enable\_private\_nodes](#input\_enable\_private\_nodes) | Enable private nodes by default | `bool` | `false` | no |
 | <a name="input_extra_roles"></a> [extra\_roles](#input\_extra\_roles) | Extra roles to add to the cluster's default service account | `map(string)` | `{}` | no |

modules/gke/main.tf

@@ -97,7 +97,8 @@ resource "google_container_cluster" "this" {
     for_each = var.cluster_autoscaling == false ? [] : ["placeholder"]
 
     content {
-      enabled = var.cluster_autoscaling
+      enabled                       = var.cluster_autoscaling
+      default_compute_class_enabled = var.default_compute_class_enabled
       resource_limits {
         resource_type = var.cluster_autoscaling_cpu_limits.resource_type
         minimum       = var.cluster_autoscaling_cpu_limits.minimum

modules/gke/variables.tf

@@ -176,3 +176,9 @@ variable "product" {
   type        = string
   default     = "unknown"
 }
+
+variable "default_compute_class_enabled" {
+  default     = false
+  type        = bool
+  description = "Specifies whether default compute class behavior is enabled. If enabled, cluster autoscaler will use Compute Class with name default for all the workloads, if not overridden."
+}