terraform validate

用于快速检查配置文件中的语法错误，无需执行terraform plan/apply命令即可定位错误的详细位置和原因。

• 检验正确时，回显如下：

  $ terraform validate
  Success! The configuration is valid.
  

• 检验错误时，回显如下：

  $ terraform validate
  Error: Missing required argument
  
    on main.tf line 1, in resource "volcengine_vpc" "foo":
     1: resource "volcengine_vpc" "foo" {
  
  The argument "cidr_block" is required, but no definition was found.
  
  
  Error: Unsupported argument
  
    on main.tf line 3, in resource "volcengine_vpc" "foo":
     3:   cidr = "172.16.0.0/16"
  
  An argument named "cidr" is not expected here. Did you mean "id"?
  

terraform fmt

用于格式化当前目录及子目录下的所有的.tf文件，使代码风格统一。

terraform graph

用于根据配置文件、执行计划可视化的输出资源间依赖关系，且输出为DOT格式数据。

$ terraform graph
digraph {
        compound = "true"
        newrank = "true"
        subgraph "root" {
                "[root] provider.volcengine" [label = "provider.volcengine", shape = "diamond"]
                "[root] volcengine_security_group.foo1" [label = "volcengine_security_group.foo1", shape = "box"]
                "[root] volcengine_subnet.foo1" [label = "volcengine_subnet.foo1", shape = "box"]
                "[root] volcengine_subnet.foo2" [label = "volcengine_subnet.foo2", shape = "box"]
                "[root] volcengine_vpc.foo" [label = "volcengine_vpc.foo", shape = "box"]
                "[root] meta.count-boundary (EachMode fixup)" -> "[root] volcengine_security_group.foo1"
                "[root] provider.volcengine (close)" -> "[root] volcengine_security_group.foo1"
                "[root] root" -> "[root] meta.count-boundary (EachMode fixup)"
                "[root] root" -> "[root] provider.volcengine (close)"
                "[root] volcengine_security_group.foo1" -> "[root] volcengine_subnet.foo1"
                "[root] volcengine_security_group.foo1" -> "[root] volcengine_subnet.foo2"
                "[root] volcengine_subnet.foo1" -> "[root] volcengine_vpc.foo"
                "[root] volcengine_subnet.foo2" -> "[root] volcengine_vpc.foo"
                "[root] volcengine_vpc.foo" -> "[root] provider.volcengine"
        }
}

执行dot命令可以将输出结果转换为可视化图表：

$ 根据操作系统不同 安装 graphviz
$ terraform graph | dot -Tsvg > test.svg

terraform import

用于将存量资源导入state文件，命令为：terraform import <资源类型>.<资源名称> <资源ID>。

$ terraform import volcengine_vpc.foo vpc-mjhlf3gs61hc5smt1ajya7ct
volcengine_vpc.foo: Importing from ID "vpc-mjhlf3gs61hc5smt1ajya7ct"...
volcengine_vpc.foo: Import prepared!
  Prepared volcengine_vpc for import
volcengine_vpc.foo: Refreshing state... [id=vpc-mjhlf3gs61hc5smt1ajya7ct]

Import successful!

The resources that were imported are shown above. These resources are now in
your Terraform state and will henceforth be managed by Terraform.

terraform taint

用于手动将资源标记为污染状态 (tainted)，标记后再次执行terraform apply命令时，Terraform会删除并重建该资源，命令为：terraform taint <资源类型>.<资源名称>。

$ terraform taint volcengine_subnet.foo
Resource instance volcengine_subnet.foo has been marked as tainted.

标记后执行terraform show命令可以看到相应资源已变为污染状态 (tainted)：

$ terraform show
...
# volcengine_subnet.foo: (tainted)
resource "volcengine_subnet" "foo" {
  ...
}

terraform untaint

用于手动取消资源的污染状态 (tainted)，使其恢复到正常状态，即terraform taint命令的逆操作，命令为：terraform untaint <资源类型>.<资源名称>。

$ terraform untaint volcengine_subnet.foo
Resource instance volcengine_subnet.foo has been successfully untainted.

terraform console

用于打开交互式的控制台，并在控制台中进行表达式及内置函数的体验和测试。

$ terraform console
> length("Hello,world!")
12