add ability to restore cluster from snapshots #96 (#97)

* add ability to restore cluster from snapshots

* Auto Format

* Update variables.tf
Co-authored-by: Vladimir <vladimir.fess@gmail.com>

* update readme

* Auto Format
Co-authored-by: Sung Kang <kang.sung@heb.com>
Co-authored-by: cloudpossebot <11232728+cloudpossebot@users.noreply.github.com>
Co-authored-by: Vladimir <vladimir.fess@gmail.com>

README.md

@@ -220,6 +220,7 @@ Available targets:
 | port | Redis port | `number` | `6379` | no |
 | regex\_replace\_chars | Regex to replace chars with empty string in `namespace`, `environment`, `stage` and `name`.<br>If not set, `"/[^a-zA-Z0-9-]/"` is used to remove all characters other than hyphens, letters and digits. | `string` | `null` | no |
 | 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 |
+| snapshot\_arns | A single-element string list containing an Amazon Resource Name (ARN) of a Redis RDB snapshot file stored in Amazon S3. Example: arn:aws:s3:::my\_bucket/snapshot1.rdb | `list(string)` | `[]` | no |
 | snapshot\_name | The name of a snapshot from which to restore data into the new node group. Changing the snapshot\_name forces a new resource. | `string` | `null` | no |
 | snapshot\_retention\_limit | The number of days for which ElastiCache will retain automatic cache cluster snapshots before deleting them. | `number` | `0` | no |
 | snapshot\_window | The daily time range (in UTC) during which ElastiCache will begin taking a daily snapshot of your cache cluster. | `string` | `"06:30-07:30"` | no |

docs/terraform.md

@@ -57,6 +57,7 @@
 | port | Redis port | `number` | `6379` | no |
 | regex\_replace\_chars | Regex to replace chars with empty string in `namespace`, `environment`, `stage` and `name`.<br>If not set, `"/[^a-zA-Z0-9-]/"` is used to remove all characters other than hyphens, letters and digits. | `string` | `null` | no |
 | 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 |
+| snapshot\_arns | A single-element string list containing an Amazon Resource Name (ARN) of a Redis RDB snapshot file stored in Amazon S3. Example: arn:aws:s3:::my\_bucket/snapshot1.rdb | `list(string)` | `[]` | no |
 | snapshot\_name | The name of a snapshot from which to restore data into the new node group. Changing the snapshot\_name forces a new resource. | `string` | `null` | no |
 | snapshot\_retention\_limit | The number of days for which ElastiCache will retain automatic cache cluster snapshots before deleting them. | `number` | `0` | no |
 | snapshot\_window | The daily time range (in UTC) during which ElastiCache will begin taking a daily snapshot of your cache cluster. | `string` | `"06:30-07:30"` | no |

main.tf

@@ -97,6 +97,7 @@ resource "aws_elasticache_replication_group" "default" {
   transit_encryption_enabled    = var.transit_encryption_enabled
   kms_key_id                    = var.at_rest_encryption_enabled ? var.kms_key_id : null
   snapshot_name                 = var.snapshot_name
+  snapshot_arns                 = var.snapshot_arns
   snapshot_window               = var.snapshot_window
   snapshot_retention_limit      = var.snapshot_retention_limit
   apply_immediately             = var.apply_immediately

variables.tf

@@ -175,6 +175,12 @@ variable "replication_group_id" {
   default     = ""
 }
 
+variable "snapshot_arns" {
+  type        = list(string)
+  description = "A single-element string list containing an Amazon Resource Name (ARN) of a Redis RDB snapshot file stored in Amazon S3. Example: arn:aws:s3:::my_bucket/snapshot1.rdb"
+  default     = []
+}
+
 
 variable "snapshot_name" {
   type        = string