New variables: create_parameter_group and parameter_group_name

README.md

@@ -293,6 +293,7 @@ Available targets:
 | <a name="input_ok_actions"></a> [ok\_actions](#input\_ok\_actions) | The list of actions to execute when this alarm transitions into an OK state from any other state. Each action is specified as an Amazon Resource Number (ARN) | `list(string)` | `[]` | no |
 | <a name="input_parameter"></a> [parameter](#input\_parameter) | A list of Redis parameters to apply. Note that parameters may differ from one Redis family to another | <pre>list(object({<br>    name  = string<br>    value = string<br>  }))</pre> | `[]` | no |
 | <a name="input_parameter_group_description"></a> [parameter\_group\_description](#input\_parameter\_group\_description) | Managed by Terraform | `string` | `null` | no |
+| <a name="input_parameter_group_name"></a> [parameter\_group\_name](#input\_parameter\_group\_name) | Override the default parameter group name | `string` | `null` | no |
 | <a name="input_port"></a> [port](#input\_port) | Redis port | `number` | `6379` | no |
 | <a name="input_regex_replace_chars"></a> [regex\_replace\_chars](#input\_regex\_replace\_chars) | Terraform regular expression (regex) string.<br>Characters matching the regex will be removed from the ID elements.<br>If not set, `"/[^a-zA-Z0-9-]/"` is used to remove all characters other than hyphens, letters and digits. | `string` | `null` | no |
 | <a name="input_replication_group_id"></a> [replication\_group\_id](#input\_replication\_group\_id) | Replication group ID with the following constraints: <br>A name must contain from 1 to 20 alphanumeric characters or hyphens. <br> The first character must be a letter. <br> A name cannot end with a hyphen or contain two consecutive hyphens. | `string` | `""` | no |

docs/terraform.md

@@ -87,6 +87,7 @@
 | <a name="input_ok_actions"></a> [ok\_actions](#input\_ok\_actions) | The list of actions to execute when this alarm transitions into an OK state from any other state. Each action is specified as an Amazon Resource Number (ARN) | `list(string)` | `[]` | no |
 | <a name="input_parameter"></a> [parameter](#input\_parameter) | A list of Redis parameters to apply. Note that parameters may differ from one Redis family to another | <pre>list(object({<br>    name  = string<br>    value = string<br>  }))</pre> | `[]` | no |
 | <a name="input_parameter_group_description"></a> [parameter\_group\_description](#input\_parameter\_group\_description) | Managed by Terraform | `string` | `null` | no |
+| <a name="input_parameter_group_name"></a> [parameter\_group\_name](#input\_parameter\_group\_name) | Override the default parameter group name | `string` | `null` | no |
 | <a name="input_port"></a> [port](#input\_port) | Redis port | `number` | `6379` | no |
 | <a name="input_regex_replace_chars"></a> [regex\_replace\_chars](#input\_regex\_replace\_chars) | Terraform regular expression (regex) string.<br>Characters matching the regex will be removed from the ID elements.<br>If not set, `"/[^a-zA-Z0-9-]/"` is used to remove all characters other than hyphens, letters and digits. | `string` | `null` | no |
 | <a name="input_replication_group_id"></a> [replication\_group\_id](#input\_replication\_group\_id) | Replication group ID with the following constraints: <br>A name must contain from 1 to 20 alphanumeric characters or hyphens. <br> The first character must be a letter. <br> A name cannot end with a hyphen or contain two consecutive hyphens. | `string` | `""` | no |

main.tf

@@ -90,7 +90,7 @@ resource "aws_elasticache_subnet_group" "default" {
 
 resource "aws_elasticache_parameter_group" "default" {
   count       = module.this.enabled ? 1 : 0
-  name        = module.this.id
+  name        = var.parameter_group_name != null ? var.parameter_group_name : "${module.this.id}-${var.family}"
   description = var.parameter_group_description != null ? var.parameter_group_description : "Elasticache parameter group for ${module.this.id}"
   family      = var.family
 
@@ -103,9 +103,11 @@ resource "aws_elasticache_parameter_group" "default" {
   }
 
   tags = module.this.tags
-
-  # Ignore changes to the description since it will try to recreate the resource
+
   lifecycle {
+    create_before_destroy = true
+
+    # Ignore changes to the description since it will try to recreate the resource
     ignore_changes = [
       description,
     ]

variables.tf

@@ -231,6 +231,12 @@ variable "parameter_group_description" {
   description = "Managed by Terraform"
 }
 
+variable "parameter_group_name" {
+  type        = string
+  default     = null
+  description = "Override the default parameter group name"
+}
+
 variable "log_delivery_configuration" {
   type        = list(map(any))
   default     = []