feat: enable data_cache_config for postgresql read replicas (#619)

Author: sofuture

modules/postgresql/README.md

@@ -163,7 +163,7 @@ module "pg" {
 | read\_replica\_deletion\_protection | Used to block Terraform from deleting replica SQL Instances. | `bool` | `false` | no |
 | read\_replica\_deletion\_protection\_enabled | Enables protection of replica instance from accidental deletion across all surfaces (API, gcloud, Cloud Console and Terraform). | `bool` | `false` | no |
 | read\_replica\_name\_suffix | The optional suffix to add to the read instance name | `string` | `""` | no |
-| read\_replicas | List of read replicas to create. Encryption key is required for replica in different region. For replica in same region as master set encryption\_key\_name = null | <pre>list(object({<br>    name                  = string<br>    name_override         = optional(string)<br>    tier                  = optional(string)<br>    edition               = optional(string)<br>    availability_type     = optional(string)<br>    zone                  = optional(string)<br>    disk_type             = optional(string)<br>    disk_autoresize       = optional(bool)<br>    disk_autoresize_limit = optional(number)<br>    disk_size             = optional(string)<br>    user_labels           = map(string)<br>    database_flags = optional(list(object({<br>      name  = string<br>      value = string<br>    })), [])<br>    insights_config = optional(object({<br>      query_plans_per_minute  = optional(number, 5)<br>      query_string_length     = optional(number, 1024)<br>      record_application_tags = optional(bool, false)<br>      record_client_address   = optional(bool, false)<br>    }), null)<br>    ip_configuration = object({<br>      authorized_networks                           = optional(list(map(string)), [])<br>      ipv4_enabled                                  = optional(bool)<br>      private_network                               = optional(string, )<br>      require_ssl                                   = optional(bool)<br>      ssl_mode                                      = optional(string)<br>      allocated_ip_range                            = optional(string)<br>      enable_private_path_for_google_cloud_services = optional(bool, false)<br>      psc_enabled                                   = optional(bool, false)<br>      psc_allowed_consumer_projects                 = optional(list(string), [])<br>    })<br>    encryption_key_name = optional(string)<br>  }))</pre> | `[]` | no |
+| read\_replicas | List of read replicas to create. Encryption key is required for replica in different region. For replica in same region as master set encryption\_key\_name = null | <pre>list(object({<br>    name                  = string<br>    name_override         = optional(string)<br>    tier                  = optional(string)<br>    edition               = optional(string)<br>    availability_type     = optional(string)<br>    zone                  = optional(string)<br>    disk_type             = optional(string)<br>    disk_autoresize       = optional(bool)<br>    disk_autoresize_limit = optional(number)<br>    disk_size             = optional(string)<br>    user_labels           = map(string)<br>    database_flags = optional(list(object({<br>      name  = string<br>      value = string<br>    })), [])<br>    insights_config = optional(object({<br>      query_plans_per_minute  = optional(number, 5)<br>      query_string_length     = optional(number, 1024)<br>      record_application_tags = optional(bool, false)<br>      record_client_address   = optional(bool, false)<br>    }), null)<br>    ip_configuration = object({<br>      authorized_networks                           = optional(list(map(string)), [])<br>      ipv4_enabled                                  = optional(bool)<br>      private_network                               = optional(string, )<br>      require_ssl                                   = optional(bool)<br>      ssl_mode                                      = optional(string)<br>      allocated_ip_range                            = optional(string)<br>      enable_private_path_for_google_cloud_services = optional(bool, false)<br>      psc_enabled                                   = optional(bool, false)<br>      psc_allowed_consumer_projects                 = optional(list(string), [])<br>    })<br>    encryption_key_name = optional(string)<br>    data_cache_enabled  = optional(bool)<br>  }))</pre> | `[]` | no |
 | region | The region of the Cloud SQL resources | `string` | `"us-central1"` | no |
 | root\_password | Initial root password during creation | `string` | `null` | no |
 | secondary\_zone | The preferred zone for the replica instance, it should be something like: `us-central1-a`, `us-east1-c`. | `string` | `null` | no |

modules/postgresql/read_replica.tf

@@ -104,6 +104,13 @@ resource "google_sql_database_instance" "replicas" {
       zone = lookup(each.value, "zone", local.zone)
     }
 
+    dynamic "data_cache_config" {
+      for_each = coalesce(each.value.edition, var.edition, "ENTERPRISE") == "ENTERPRISE_PLUS" && coalesce(each.value.data_cache_enabled, var.data_cache_enabled, false) ? ["cache_enabled"] : []
+      content {
+        data_cache_enabled = lookup(each.value, "data_cache_enabled", var.data_cache_enabled)
+      }
+    }
+
   }
 
   depends_on = [google_sql_database_instance.default]

modules/postgresql/variables.tf

@@ -277,6 +277,7 @@ variable "read_replicas" {
       psc_allowed_consumer_projects                 = optional(list(string), [])
     })
     encryption_key_name = optional(string)
+    data_cache_enabled  = optional(bool)
   }))
   default = []
 }