导入资源而不强制创建新资源

Question

我正在尝试恢复配置了 Terraform 的 AWS 账户的状态。我的模块已经运行 'terraform import' 并且能够进入状态 aws_subnets，但是当我运行 'terraform plan' 它仍然尝试强制销毁现有子网并重新创建它们。

这是我的 terraform 的样子

  resource "aws_subnet" "instance_subnets" {
  for_each = { for idx, subnet in keys(var.subnets) : idx => { name = subnet
  cidr = var.subnets[subnet] } }
  cidr_block        = each.value.cidr
  vpc_id            = aws_vpc.vpc.id
  availability_zone = element(data.aws_availability_zones.available.names, each.key)

  tags = {
    Name = each.value.name
  }
}

我的terraform.tf

variable "subnets" {
  type = map(string)
  default = {
    "Public" : "10.10.0.0/24"
    "Private" : "10.10.1.0/24"
  }

terraform 计划输出

  # module.mymodule.aws_subnet.subnets will be destroyed
  - resource "aws_subnet" "subnets" {
      - arn                             = "arn:aws:ec2:eu-west-2:0xxxxxxxxxxxxx:subnet/subnet-0000xxxxx" -> null
      - assign_ipv6_address_on_creation = false -> null
      - availability_zone               = "eu-west-2a" -> null
      - availability_zone_id            = "euw2-az2" -> null
      - cidr_block                      = "10.10.0.0/24" -> null
      - id                              = "subnet-0000xxxxx" -> null
      - map_customer_owned_ip_on_launch = false -> null
      - map_public_ip_on_launch         = false -> null
      - owner_id                        = "0xxxxxxxxxxxxx" -> null
      - tags                            = {
          - "Name" = "Public"
        } -> null
      - tags_all                        = {
          - "Name" = "Public"
        } -> null
      - vpc_id                          = "vpc-0000xxxxxxx" -> null

      - timeouts {}
    }

  # module.mymodule.aws_subnet.subnets[1] will be destroyed
  - resource "aws_subnet" "subnets" {
      - arn                             = "arn:aws:ec2:eu-west-2:0xxxxxxxxxxxxx:subnet/subnet-0000xxxxx" -> null
      - assign_ipv6_address_on_creation = false -> null
      - availability_zone               = "eu-west-2b" -> null
      - availability_zone_id            = "euw2-az3" -> null
      - cidr_block                      = "10.10.1.0/24" -> null
      - id                              = "subnet-0000xxxxx" -> null
      - map_customer_owned_ip_on_launch = false -> null
      - map_public_ip_on_launch         = false -> null
      - owner_id                        = "0xxxxxxxxxxxxx" -> null
      - tags                            = {
          - "Name" = "Private"
        } -> null
      - tags_all                        = {
          - "Name" = "Private"
        } -> null
      - vpc_id                          = "vpc-0000xxxxxxx" -> null

      - timeouts {}
    }

  # module.mymodule.aws_subnet.subnets["0"] will be created
  + resource "aws_subnet" "subnets" {
      + arn                             = (known after apply)
      + assign_ipv6_address_on_creation = false
      + availability_zone               = "eu-west-2a"
      + availability_zone_id            = (known after apply)
      + cidr_block                      = "10.10.0.0/24"
      + id                              = (known after apply)
      + ipv6_cidr_block_association_id  = (known after apply)
      + map_public_ip_on_launch         = false
      + owner_id                        = (known after apply)
      + tags                            = {
          + "Name" = "Public"
        }
      + tags_all                        = {
          + "Name" = "Public"
        }
      + vpc_id                          = "vpc-0000xxxxxxx"
    }

  # module.mymodule.aws_subnet.subnets["1"] will be created
  + resource "aws_subnet" "subnets" {
      + arn                             = (known after apply)
      + assign_ipv6_address_on_creation = false
      + availability_zone               = "eu-west-2b"
      + availability_zone_id            = (known after apply)
      + cidr_block                      = "10.10.1.0/24"
      + id                              = (known after apply)
      + ipv6_cidr_block_association_id  = (known after apply)
      + map_public_ip_on_launch         = false
      + owner_id                        = (known after apply)
      + tags                            = {
          + "Name" = "Private"
        }
      + tags_all                        = {
          + "Name" = "Private"
        }
      + vpc_id                          = "vpc-0000xxxxxxx"
    }

我有无法在每个子网中终止的 ec2 实例，因此无法将其销毁并重新创建。是否可以以允许我按原样使用状态文件的方式导入它们？

Answer 1

for_each使用的索引是子网长度变量的索引，在正常情况下for_each你应该使用名称索引：

for_each = var.subnets

然后使用名称索引导入：

terraform import module.mymodule.aws_subnet.subnets["private"] SUBNET_ID
terraform import module.mymodule.aws_subnet.subnets["public"] SUBNET_ID

在此处阅读更多内容：

导入资源而不强制创建新资源

Import resources without forcing new ones being created

amazon-web-services

terraform

terraform-provider-aws