如何放入 varable.tf 以在 terraform 中使用外部数据运行脚本

本文介绍了如何放入 varable.tf 以在 terraform 中使用外部数据运行脚本的处理方法,对大家解决问题具有一定的参考价值

问题描述

这是我之前询问的以下内容的延续.

This is the continutaion of the following contents i asked before.

我要识别terraform执行环境的公网ip并加入安全组

我的 terraform 目录结构如下.

My terraform direcotry structure is as follows.

root/
 ├ main.tf
 ├ test.sh
 ├ modules/aws
 │          └ ssh.tf/
 │          └ variables.tf/

test.sh

#!/bin/sh -xe

echo {"ip":""`curl ipinfo.io/ip`""}

main.tf

module "aws" {

  source = "./modules/aws"

}

变量.tf

variable ssh_ip_address {
  default     = "xxx.xx.xx.xx"
}

ssh.tf

resource "aws_security_group" "ssh" {
  name        = "${var.name}-ssh"
  description = "Allow connection by ssh"
  vpc_id      = "${aws_vpc.main.id}"

  ingress {
    from_port   = 22
    to_port     = 22
    protocol    = "tcp"
    cidr_blocks = ["${var.ssh_ip_address}/32"]
  }

  egress {
    from_port   = 0 
    to_port     = 0 
    protocol    = "-1"
    cidr_blocks = ["0.0.0.0/0"]
  }

  tags = { 
    Name = "${var.name}",
  }
}

我使用 main.tf 中的模块选项加载 module/aws 目录下的 .tf 文件

I load the .tf file under the module/aws directory using the module option in main.tf

我想运行我的本地脚本,识别运行 terraform 的公共 IP 并使用 ssh.tf 文件中的结果.

and I would like to run my local script, identify the public IP that ran terraform and use the result in the ssh.tf file.

我正在使用数据外部选项来运行我的本地脚本.

I'm using data external option to run my local script.

data "external" "example" {
  program = ["sh", "test.sh" ]
}

但是,在我自己的数据验证中,除 main.tf 外,数据外部选项未正确执行.

but, in data verification of myself, data external option is not executed properly except main.tf.

在 main.tf 中运行外部数据并在 ssh.tf 中使用时,我们收到错误,因为这样的值不存在.

When running data external in main.tf and use it in ssh.tf, we got error following that such value does not exist.

output 'commandout': unknown resource 'data.external.example' referenced in variable data.external.example.result

我遇到错误时的配置文件如下.

My configuration file when I faced an error is as follows.

main.tf

data "external" "example" {
  program = ["sh", "test.sh" ]
}

module "aws" {    
 source = "./modules/aws"    
}

ssh.tf

output "commandout" {
  value = "${data.external.example.result}"
}

resource "aws_security_group" "ssh" {
      name        = "${var.name}-ssh"
      description = "Allow connection by ssh"
      vpc_id      = "${aws_vpc.main.id}"

      ingress {
        from_port   = 22
        to_port     = 22
        protocol    = "tcp"
        cidr_blocks = ["${data.external.external.result}/32"]
      }

      egress {
        from_port   = 0 
        to_port     = 0 
        protocol    = "-1"
        cidr_blocks = ["0.0.0.0/0"]
      }

      tags = { 
        Name = "${var.name}",
      }
    }

有没有办法在 terraform 中以最快的速度运行 tf.file?

is there a way to run most rapidly tf.file in terraform?

如果有这样的方法,我想先用data external option来执行,然后在ssh.tf中使用

If there is such a way, i would like to use data external option to execute it first, and use it in ssh.tf

或者我想把数据外部执行的结果放到var.tf的某个值中

or I would like to put the result of data external execution into a certain value of var.tf

如果有其他方法可以解决此问题,请告诉我.感谢您阅读我的问题.

Please let me know if there are other ways to solve this problem. Thank you for reading my question.

推荐答案

您需要进行一些更改才能使其正常工作.test.sh 脚本只需要输出 json 格式作为结果,但是现在(或者当我运行它时)我也从 curl 命令中获得输出.我不得不包装 curl 命令并忽略输出,然后使用变量来完成 json,如下所示:

There are a few changes you need to make for this to work correctly. The test.sh script needs to only output json format as a result, but as it is right now (or when I was running it) I get output from the curl command as well. I had to wrap the curl command and ignore the output, and then use a variable to complete the json like so:

#!/bin/sh

{
  IP_ADDRESS=$(curl ipinfo.io/ip)
} &> /dev/null

echo {"ip":""$IP_ADDRESS""}

现在,当您在 main.tf 中调用您的 aws 模块时,我们需要将 ssh_ip_address 变量设置为等于ip";test.sh 脚本结果的输出.
另外,我注意到在您的 ssh.tf 文件中,您试图引用${data.external.example.result}".在 aws 模块内部,但由于该数据是在模块外部定义的,因此它将不起作用.我建议创建一个类型为map"的附加变量.在 variables.tf 中,您可以在 main.tf 中设置它;在我的示例中,我添加了command_output".变量.

Now when you are calling your aws module in the main.tf we will want to set the ssh_ip_address variable to equal the "ip" output of the test.sh script result.
Also, I noticed that in your ssh.tf file you are trying to reference the "${data.external.example.result}" inside the aws module, but since that data is defined outside of the module it won't work. I suggest creating an addition variable of type "map" in the variables.tf which you can then set in the main.tf; in my example I have added the "command_output" variable.

在这里你可以看到我添加了 command_output 变量:

Here you can see I added the command_output variable:

variable ssh_ip_address {
  default     = "xxx.xx.xx.xx"
}

variable "command_output" {
  type = "map"
}

variable name {
  default = "test"
}

这是 main.tf 的样子(注意我们正在设置 aws 模块中定义的变量):

Here is what the main.tf not looks like (notice that we are setting the variables defined in the aws module):

data "external" "example" {
  program = ["sh", "test.sh" ]
}

module "aws" {
  source = "./modules/aws"

  ssh_ip_address = "${data.external.example.result.ip}"
  
  command_output = "${data.external.example.result}"
}

最后,这里是 ssh.tf 文件:

Lastly, here is the ssh.tf file:

resource "aws_security_group" "ssh" {
  name        = "${var.name}-ssh"
  description = "Allow connection by ssh"
  vpc_id      = "${aws_vpc.main.id}"

  ingress {
    from_port   = 22
    to_port     = 22
    protocol    = "tcp"
    cidr_blocks = ["${var.ssh_ip_address}/32"]
  }

  egress {
    from_port   = 0
    to_port     = 0
    protocol    = "-1"
    cidr_blocks = ["0.0.0.0/0"]
  }

  tags = {
    Name = "${var.name}",
  }
}

output "commandout" {
  value = "${var.command_output}"
}

希望这会有所帮助!

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