Terraform：来自yaml的嵌套for循环答案

【问题标题】：Terraform: nested for loop from yamlTerraform：来自yaml的嵌套for循环
【发布时间】：2021-12-29 12:00:09
【问题描述】：

我正在尝试在 terraform 上运行嵌套的 for 循环。
我有以下 Yaml 文件：

Employees:
  - Department:
    - Dev:
      - name: "danielf"
        role: developer
        details:
          email  : danielf@example.com
          firstname  : daniel
          lastname   : folsik
      - name: "johnb"
        role: developer
        details:
          email  : johnb@example.com
          firstname  : john
          lastname   : belk
    - Ops:
      - name: "benol"
        role: devops
        details:
          email  : benol@example.com
          firstname  : ben
          lastname   : olkin
      - name: "pauld"
        role: devops
        details:
          email  : pauld@example.com
          firstname  : paul
          lastname   : dempler

我正在使用locals获取yaml数据：

locals {
  ou_config = yamldecode(file("employees.yaml"))
}

我想使用 for_each 进入“Dev”和“Ops”列表中的对象列表。
例如，我想在“Dev”列表上运行以在第一次迭代中获取以下对象列表：

[
   {
      key   = "email"
      value = "danielf@example.com"
    },
    {
      key   = "firstname"
      value = "daniel"
    },
    {
      key   = "lastname"
      value = "folskin"
    }
  ]

for_each 的下一次运行将是：

[
   {
      key   = "email"
      value = "johnb@example.com"
    },
    {
      key   = "firstname"
      value = "john"
    },
    {
      key   = "lastname"
      value = "belk"
    }
  ]

等
如何在 terraform 上进行操作？

【问题讨论】：

标签： terraform terraform-provider-aws terraform0.12+ terraform-template-file

【解决方案1】：

如果我理解正确，您尝试提取的只是该 yaml 文件的 details 部分...

为了得到所有，我会这样做：

locals {
  ou_config = yamldecode(file("employees.yaml"))

  expanded_names = flatten([
    for e in local.ou_config.Employees : [
        for d in e.Department : [
            for key, person in d : [
                for key, value in person : [
                    value.details
                ]
            ]
        ]
    ]
  ])
}

output "test" {
    value = local.expanded_names
}

如果我们想要过滤，我们添加一个if key == "Dev"

locals {
  ou_config = yamldecode(file("employees.yaml"))

  expanded_names = flatten([
    for e in local.ou_config.Employees : [
        for d in e.Department : [
            for key, person in d : [
                for key, value in person : [
                    value.details
                ]
            ] if key == "Dev"
        ]
    ]
  ])
}

output "test" {
    value = local.expanded_names
}

一个 terraform 计划如下所示：

Changes to Outputs:
  + test = [
      + {
          + email     = "danielf@example.com"
          + firstname = "daniel"
          + lastname  = "folsik"
        },
      + {
          + email     = "johnb@example.com"
          + firstname = "john"
          + lastname  = "belk"
        },
    ]

该格式应该比您建议的键值更容易在最终资源中循环

【讨论】：