检查 terraform 中的空值

Question

我对空值有疑问。以下是对我来说棘手的一个。谁能建议我如何检查该值是否为空？

locals {
  application_vars = {
    "oke_build" = [
      "121",
      "121",
      "121",
    ]
    "ipa" = [
      "101.10.2,1",
      "101.10.2,2",
      null
    ]
    "size" = [
      "c4.8xlarge",
      null,
      null,
    ]
  }

}

我想验证列表是否包含空值。

Answer 1

您可以使用 compact 函数从列表中获取 non-null 个元素。

然后，您可以将原始列表的长度与 compact 函数返回的列表的长度进行比较。

locals {
  application_vars = {
    "oke_build" = [
      "121",
      "121",
      "121",
    ]
    "ipa" = [
      "101.10.2,1",
      "101.10.2,2",
      null
    ]
    "size" = [
      "c4.8xlarge",
      null,
      null,
    ]
  }
}

output "not_null_check_oke_build" {
  value = length(compact(local.application_vars.oke_build)) == length(local.application_vars.oke_build) ? "has no null elements" : "has null elements"
}

output "not_null_check_ipa" {
      value = length(compact(local.application_vars.ipa)) == length(local.application_vars.ipa) ? "has no null elements" : "has null elements"
    }

output "not_null_check_size" {
      value = length(compact(local.application_vars.size)) == length(local.application_vars.size) ? "has no null elements" : "has null elements"
    }

Apply complete! Resources: 0 added, 0 changed, 0 destroyed.

Outputs:

not_null_check_ipa = "has null elements"

not_null_check_oke_build = "has no null elements"

not_null_check_size = "has null elements"

如果您要检查的列表太多，这会变得重复，您必须将这些与另一个循环循环。但是对于 2-3 个列表，这样设置是可以的。

检查 terraform 中的空值

check null values in terraform

terraform

terraform0.12+