Terraform 1.2.8中如何从对象输出提取指定实例公网IP？

你的模块输出结构如下：

ec2_multiple_instances = {
  "one" = {
    "private_dns" = "aaaaa.bbbb.cccc"
    "private_ip" = "xx.xx.xx.xx"
    "public_dns" = "ec2-xx-xx-xx-xx.compute.amazonaws.com"
    "public_ip" = "xx.xx.xx.xx"
    "spot_bid_status" = ""
    "spot_instance_id" = ""
    "spot_request_state" = ""
  }
  "two" = {
    "private_dns" = "xxxxx.yyyyy.zzzzz"
    "private_ip" = "yy.yy.yy.yy"
    "public_dns" = "ec2-yy-yy-yy-yy.compute.amazonaws.com"
    "public_ip" = "yy.yy.yy.yy"
    "spot_bid_status" = ""
    "spot_instance_id" = ""
    "spot_request_state" = ""
  }
}

要提取指定实例的public_ip并定义为单独的输出，直接在Terraform配置中添加output块即可，Terraform 1.2.8支持直接通过嵌套对象的属性路径访问值：

output "ec2_one_public_ip" {
  description = "Public IP of instance 'one'"
  value       = module.ec2_multiple_instances.one.public_ip
}

output "ec2_two_public_ip" {
  description = "Public IP of instance 'two'"
  value       = module.ec2_multiple_instances.two.public_ip
}

添加完成后执行terraform apply应用配置，之后可以通过terraform output ec2_one_public_ip或terraform output ec2_two_public_ip单独查看对应实例的公网IP，也可以直接执行terraform output查看所有输出结果。

内容的提问来源于stack exchange，提问作者Nightt