Terraform 迭代嵌套迭代答案

【问题标题】：Terraform iterate over a nested iterateTerraform 迭代嵌套迭代
【发布时间】：2021-06-21 13:14:31
【问题描述】：

我有这个 terraform 代码，它有两个动态块：


# block one
  dynamic "backend_address_pool" {
    for_each = var.backend_pools

    content {
      name      = each.key
      fqdns     = each.value["fqdns"]
      ip_addresses = each.value["ip_addresses"]
    }
  }    

# block two
  dynamic "request_routing_rule" {
    for_each = var.request_routing_rules

    content {
      name      = each.key
      rule_type     = each.value["rule_type"]
      http_listener_name = each.value["http_listener_name"]
      backend_address_pool_name = <How to get the names of the block1's address pools here>
      backend_http_settings_name = each.value["backend_http_settings_name"]
    }
  }

在block1 中，我迭代了多个地址池，即pool1、pool2、pool3 等等，在block2 中，我需要获取每个块迭代的值和将其分配给block2 中的值backend_address_pool_name

我该怎么做？

那么在block2 中，有没有一种方法可以将每次迭代的值引用为dynamic.backend_address_pool 并分配给block2 中的值backend_address_pool_name？

这是我的variables.tf

variable "backend_pools" {
  type = map(object({
    name         = string
    fqdns        = list(string)
    ip_addresses = list(string)
  }))

  description = "The configuration for backend pools"
}

variable "request_routing_rules" {
  type = map(object({
    rule_type                  = string
    http_listener_name         = string
    backend_address_pool_name  = string
    backend_http_settings_name = string
  }))

  description = "The configuration of routing rules for backend pools"
}

这是我的variables.tfvars

backend_pools = {
    pool1 = {
      fqdns        = ["some-value1", "some-value2", "some-value3"]
      ip_addresses = ["10.0.0.0"]
    },
    pool2 = {
      fqdns        = ["some-value1", "some-value2", "some-value3"]
      ip_addresses = ["10.0.0.0"]
    },
    pool3 = {
      fqdns        = ["some-value1", "some-value2", "some-value3"]
      ip_addresses = ["10.0.0.0"]
    }        
}

request_routing_rules = { 
    pool1 = {
      rule_type                  = "Basic"
      http_listener_name         = ""
      backend_address_pool_name  = ""
      backend_http_settings_name = ""
    },
    pool2 = {
      rule_type                  = "Basic"
      http_listener_name         = ""
      backend_address_pool_name  = ""
      backend_http_settings_name = ""
    }
    pool3 = {
      rule_type                  = "Basic"
      http_listener_name         = ""
      backend_address_pool_name  = ""
      backend_http_settings_name = ""
    }        
 }

【问题讨论】：

您能否在原始帖子中举例说明每个动态块的变量输入是什么样的？
我更新了帖子@rk92
谢谢，backend_address_pool_name = fqdns 在您的示例中也是如此，还是您只是想从backend_pools（pool1、pool2 等）获取池的名称？
是的，试图获取池的名称（pool1、pool2 等）
您的问题的直接答案在文档中：terraform.io/docs/language/expressions/dynamic-blocks.html。但是，像这样在嵌套迭代器中匹配两个Map 是危险的，您应该考虑将request_routing_rules 作为object 嵌套在backend_pools 中。这将更安全，更容易实施。

标签： terraform

【解决方案1】：

要添加到我上面的评论中，您可以尝试以下操作：

backend_pool_and_request_routing_rules = { 
    pool1 = {
      fqdns                     = ["some-value1", "some-value2", "some-value3"]
      ip_addresses               = ["10.0.0.0"]
      rule_type                  = "Basic"
      http_listener_name         = ""
      backend_address_pool_name  = ""
      backend_http_settings_name = ""
    },


# block one
  dynamic "backend_address_pool" {
    for_each = var.backend_pool_and_request_routing_rules

    content {
      name      = each.key
      fqdns     = each.value["fqdns"]
      ip_addresses = each.value["ip_addresses"]
    }
  }    

# block two
  dynamic "request_routing_rule" {
    for_each = var.backend_pool_and_request_routing_rules

    content {
      name      = each.key
      rule_type     = each.value["rule_type"]
      http_listener_name = each.value["http_listener_name"]
      backend_address_pool_name = each.key
      backend_http_settings_name = each.value["backend_http_settings_name"]
    }
  }

【讨论】：