# rdsのパラメータグループをfor文でまとめてかく

モジュール側で map の配列を受け取るようにする。

variable "parameters" {
  type        = list(map(string))
}

resource "aws_rds_cluster_parameter_group" "template" {
  family = "aurora-mysql5.7"

  name = var.name

  dynamic "parameter" {
    for_each = var.parameters
    content {
      apply_method = parameter.value["apply_method"]
      name         = parameter.value["name"]
      value        = parameter.value["value"]
    }
  }
}

呼び出し側で parameters の配列に必要なパラメータを map で書いてあげればよい。

module "parameter_group" {
  source      = "../../modules/aws_rds_cluster_parameter_group"
  name        = "sample-parameter-group"

  parameters = [
    { apply_method : "immediate", name : "character_set_server", value : "utf8mb4" },
    { apply_method : "pending-reboot", name : "binlog_format", value : "MIXED" },
  ]
}

plan 結果。

  # module.parameter_group.aws_rds_cluster_parameter_group.template will be created
  + resource "aws_rds_cluster_parameter_group" "template" {
      + arn         = (known after apply)
      + description = "Managed by Terraform"
      + family      = "aurora-mysql5.7"
      + id          = (known after apply)
      + name        = "sample-parameter-group"
      + name_prefix = (known after apply)
      + tags_all    = (known after apply)

      + parameter {
          + apply_method = "immediate"
          + name         = "character_set_server"
          + value        = "utf8mb4"
        }
      + parameter {
          + apply_method = "pending-reboot"
          + name         = "binlog_format"
          + value        = "MIXED"
        }
    }

Plan: 1 to add, 0 to change, 0 to destroy.