使用 terraform 模块向路由表添加额外路由

Question

我正在使用模块向路由表添加路由。下面是我的代码。它运行成功，但没有添加路由。

module.tf: (如果publicRoute和privateRoute有多个item，会添加那么多路由到路由表)

resource "aws_route" "public_routes" {
  count   = length(var.ExtraRoutes.publicRoute) > 1 ? length(var.ExtraRoutes.publicRoute) : 0
  route_table_id            = aws_route_table.VPCPublicSubnetRouteTable[0].id
  destination_cidr_block    = length(regexall("^[0-9].*.[0-9].*",var.ExtraRoutes.publicRoute[count.index].destination)) != 0 ? var.ExtraRoutes.publicRoute[count.index].destination : null
  gateway_id = length(regexall("^igw-.*",var.ExtraRoutes.publicRoute[count.index].target)) != 0 ? var.ExtraRoutes.publicRoute[count.index].target : null
}
resource "aws_route" "private_routes" {
  count   = length(var.ExtraRoutes.privateRoute) > 1 ? length(var.ExtraRoutes.privateRoute) : 0
  route_table_id            = aws_route_table.VPCPrivateSubnetRouteTable[0].id  
  destination_cidr_block    = length(regexall("^[0-9].*.[0-9].*",var.ExtraRoutes.privateRoute[count.index].destination)) != 0 ? var.ExtraRoutes.privateRoute[count.index].destination : null  
  gateway_id = length(regexall("^igw-.*",var.ExtraRoutes.privateRoute[count.index].target)) != 0 ? var.ExtraRoutes.privateRoute[count.index].target : null
}

module_var.tf（我只保留了一张地图）

variable "ExtraRoutes" {
  type = map
  default = {
    publicRoute  = []
  privateRoute = []
  }
}

main.tf（因为我需要 ExtraRoutes 中的第一项来获取 count.index + 1 中的其他内容）

module "ExtraVPCs" {
  source = "./modules/VPC"
  count  =  length(var.ExtraRoutes)
  ExtraRoutes = {
    publicRoute = var.ExtraRoutes[count.index + 1].publicRoute
    privateRoute = var.ExtraRoutes[count.index + 1].privateRoute
  }  
}

main_var.tf

variable "ExtraRoutes" {
  type = list(object({
    publicRoute            = list(object({
        destination = string
        target = string
  })
  )
  privateRoute = list(object({
    destination = string
        target = string
  }))
  }))
}

init.tfvars（ExtraRoutes 中有 2 个项目。它应该在 Route 表中添加第 2 个项目，但它没有按预期工作。

ExtraRoutes = [
  {
  publicRoute = [
      {
        destination = "10.0.0.0/32"
        target =  "igw-092aba6c187183f48"
      }
      ]
  privateRoute = [
      {
        destination = "10.0.0.0/32"
        target =  "igw-092aba6c187183f48"
      }
      ]
},
 {
  publicRoute = [
      {
        destination = "10.0.0.0/32"
        target =  "igw-0acf4f7ac1e7eba47"
      }
      ]
  privateRoute = [
      {
        destination = "10.0.0.0/32"
        target =  "igw-0acf4f7ac1e7eba47"
      }
      ]
}
]

Answer 1

您使用>0而不是>1检查列表的长度：

 count   = length(var.ExtraRoutes.publicRoute) > 0 ? length(var.ExtraRoutes.publicRoute) : 0

TF 计算来自0 的项目。当您使用>1 时，您最终会使用count = 0。