如何使用terraform过滤ec2实例的关联安全组

Question

我正在尝试获取与ID为“ i-0abcdefgh1234”的实例相关联的安全组，但输出未给出结果。

terraform.tf

data "aws_instance" "ec2" {
     instance_id = "i-0abcdefgh1234"

     filter {
        name = "tag:Name"
        values = ["name-of-the-server"]
      }
    }

    output "sg" {
       value = "${data.aws_instance.ec2.*.security_groups}"
    }

输出

data.aws_instance.ec2: Refreshing state...

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

No changes. Infrastructure is up-to-date.

This means that Terraform did not detect any differences between your
configuration and real physical resources that exist. As a result, no
actions need to be performed.

在下面有无*时尝试过

value = "${data.aws_instance.ec2.*.security_groups}"

Answer 1

数据源的插值语法为data.TYPE.NAME.ATTRIBUTE。参见this

在您的情况下，它将为${data.aws_instance.ec2.security_groups}

但是，由于documentation的状态-“某些值并不总是被设置，并且可能无法用于插值。”