【Terraform】terraform planの結果を各リソース1行でコンパクトに表示する

環境

• Terraform v1.4.2

目的

通常の terraform plan を実行すると、各リソースの詳細な設定まで表示されてしまい、コードの作成途中などでリソースの変更内容だけを確認したいときに不便です。この記事では、ワンライナーを用いて、リソースの変更内容の一覧を各リソース1行でコンパクトに表示する方法を紹介します。

コマンド

【Mac】

terraform plan | grep -E '#|Plan:'

【Windows(PowerShell)】

terraform plan | Select-String -Pattern "#|Plan:"

実行結果

改善前(terraform plan)

user@xxxx sample-tf-project % terraform plan'

Terraform used the selected providers to generate the following execution plan. Resource actions are indicated with the following symbols:
  + create

Terraform will perform the following actions:

  # module.vpc.aws_subnet.private["subnet_private01"] will be created
  + resource "aws_subnet" "private" {
      + arn                                            = (known after apply)
      + assign_ipv6_address_on_creation                = false
      + availability_zone                              = "ap-northeast-1a"
      + availability_zone_id                           = (known after apply)
      + cidr_block                                     = "xxx.xx.x.x/12"
      + enable_dns64                                   = false
      + enable_resource_name_dns_a_record_on_launch    = false
      + enable_resource_name_dns_aaaa_record_on_launch = false
      + id                                             = (known after apply)
      + ipv6_cidr_block_association_id                 = (known after apply)
      + ipv6_native                                    = false
      + map_public_ip_on_launch                        = false
      + owner_id                                       = (known after apply)
      + private_dns_hostname_type_on_launch            = (known after apply)
      + tags                                           = {
          + "Name" = "sample-subnet-private-common-a1"
        }
      + tags_all                                       = {
          + "Name"        = "sample-subnet-private-common-a1"
          + "Service"     = "sample"
        }
      + vpc_id                                         = (known after apply)
    }

    (... 以下省略)

改善後(terraform plan | grep -E '#|Plan:' など)

【Mac】

user@xxxx sample-tf-project % terraform plan | grep -E '#|Plan:'
  # module.vpc.aws_subnet.private["subnet_private01"] will be created
  # module.vpc.aws_subnet.private["subnet_private02"] will be created
  # module.vpc.aws_subnet.private["subnet_private03"] will be created
  # module.vpc.aws_subnet.public["subnet_public01"] will be created
  # module.vpc.aws_subnet.public["subnet_public02"] will be created
  # module.vpc.aws_subnet.public["subnet_public03"] will be created
  # module.vpc.aws_vpc.default will be created
Plan: 7 to add, 0 to change, 0 to destroy.

【Windows(PowerShell)】

PS C:\Users\xxxx\sample-tf-project> terraform plan | Select-String -Pattern "#|Plan:"
>>
  # module.vpc.aws_subnet.private["subnet_private01"] will be created
  # module.vpc.aws_subnet.private["subnet_private02"] will be created
  # module.vpc.aws_subnet.private["subnet_private03"] will be created
  # module.vpc.aws_subnet.public["subnet_public01"] will be created
  # module.vpc.aws_subnet.public["subnet_public02"] will be created
  # module.vpc.aws_subnet.public["subnet_public03"] will be created
  # module.vpc.aws_vpc.default will be created
Plan: 7 to add, 0 to change, 0 to destroy.