for_each 通过 Terraform 0.12 中的对象

Question

我想用下一种方式调用 terraform 模块：

module "database_role" {
 source = "modules/roles"

 project_id = "testid"
 role_name = "testrole"

 actions = {
   action: ["ENABLE_PROFILER", "DROP_DATABASE"]
   database_name: "test_db"
 }

我创建的角色模块定义是：

resource "mongodbatlas_custom_db_role" "custom_role" {
  project_id = var.project_id
  role_name  = var.role_name

  dynamic "actions" {
    for_each = [for item in [var.actions] : item]
      content {
        actions {
          action = lookup(actions.value, "action")

          resources {
            cluster = "false"
            database_name = lookup(actions.value, "database_name")
          }
        }
      }
    }
  }

因此我希望看到正确生成的操作：

 actions {
   action = "ENABLE_PROFILER"
   resources {
     cluster         = "false"
     database_name   = "test_db"
   }
 }


 actions {
   action = "DROP_DATABASE"
   resources {
     cluster         = "false"
     database_name   = "test_db"
   }
 }

我收到错误：给定的值不适合子模块变量“actions”。 我在模块动态资源中做错了什么？谢谢

Answer 1

flatten 函数可以在这里使用。

我在下面actions local var::

locals {
  actions = {
    action = ["ENABLE_PROFILER", "DROP_DATABASE"]
    database_name = "test_db"
  }
}

现在，我将根据local.actions["action"] 的大小进行展平，以达到预期的效果。有一次，我得到了扁平化的列表，我会遍历列表来创建动态块。

resource "mongodbatlas_custom_db_role" "custom_role" {
  project_id = "xxx-xxx"
  role_name  = "yyy-yyy"

  dynamic "actions" {
    for_each = flatten([
      for item in range(length(local.actions["action"])): {
        act = local.actions["action"][item]
        db_name = local.actions.database_name
      }
     ])
     content {
       action = actions.value.act
       resources {
         cluster = "false"
         database_name = actions.value.db_name
       }
     }
   }
 }

这将产生我喜欢的所需数量的块::

Harshas-MBP:mongo harshavmb$ terraform plan
Refreshing Terraform state in-memory prior to plan...
The refreshed state will be used to calculate this plan, but will not be
persisted to local or remote state storage.


------------------------------------------------------------------------

An execution plan has been generated and is shown below.
Resource actions are indicated with the following symbols:
  + create

Terraform will perform the following actions:

  # mongodbatlas_custom_db_role.custom_role will be created
  + resource "mongodbatlas_custom_db_role" "custom_role" {
      + id         = (known after apply)
      + project_id = "xxx-xxx"
      + role_name  = "yyy-yyy"

      + actions {
          + action = "ENABLE_PROFILER"

          + resources {
              + cluster       = false
              + database_name = "test_db"
            }
        }
      + actions {
          + action = "DROP_DATABASE"

          + resources {
              + cluster       = false
              + database_name = "test_db"
            }
        }
    }

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

------------------------------------------------------------------------

Note: You didn't specify an "-out" parameter to save this plan, so Terraform
can't guarantee that exactly these actions will be performed if
"terraform apply" is subsequently run.

这也可以应用于创建资源。使用嵌套或复杂循环的关键思想是将它们展平为资源或块列表，我们创建并迭代具有唯一索引的展平列表，如上例所示。