Terrraform：根据区域输入变量在不同区域创建aws vpc

Question

我正在尝试使用 terraform aws vpc 模块创建一个 aws vpc - 它应该根据输入变量在不同的区域创建。

这是我在main.tf文件中得到的：

provider "aws" {
  region  = var.region
}


module "vpc" {
  source = "terraform-aws-modules/vpc/aws"

  name = local.workspace["vpc_name"]
  cidr = local.workspace["vpc_cidr"]

  azs             = local.workspace["vpc_azs"]
  private_subnets = local.workspace["vpc_private_subnets"]
  public_subnets  = local.workspace["vpc_public_subnets"]```

这是我在variables.tf中的内容：

variable "region" {}
...
locals {
  env = {
    default = {}
...
    app-dev = {
      env_name                      = "dev"
      vpc_name                      = "app-vpc-dev"
      vpc_cidr                      = "10.12.0.0/16"
      vpc_azs                       = ["us-west-2a", "us-west-2b"]
      vpc_private_subnets           = ["10.12.60.0/24", "10.12.61.0/24"]
      vpc_public_subnets            = ["10.12.160.0/24", "10.12.161.0/24"]
    }
  }
  environmentvars = contains(keys(local.env), terraform.workspace) ? terraform.workspace : "default"
  workspace       = merge(local.env["default"], local.env[local.environmentvars])
}

然后我想用不同的变量来应用它，比如：

terraform apply -var="region=us-west-2"

要么

terraform apply -var="region=eu-west-2"

它应该在不同的区域创建 vpc。 所以变量中的“us-west-2a”、“us-west-2b”应该替换为“eu-west-2a”、“eu-west-2b”。 这可能吗？

我试图这样做：

1. 将数据 aws_availability_zones 添加到main.tf ：

data "aws_availability_zones" "available" {
  state = "available"
}

2. 使用以下命令更改 variable.tf 中的 vpc_azs变量：

vpc_azs = "${data.aws_availability_zones.available.names}"

但它不起作用 - 它在一个区域添加资源，当添加到另一个区域时，尝试替换路由表而不是创建新路由表。

Plan: 24 to add, 0 to change, 4 to destroy.
  # module.vpc.aws_route_table_association.private[0] must be replaced
-/+ resource "aws_route_table_association" "private" {
      ~ id             = "rtbassoc-035aef7e37dad1ac1" -> (known after apply)
      ~ route_table_id = "rtb-026bfeee8c7e042a6" -> (known after apply)
      ~ subnet_id      = "subnet-070f46911b6ac5d20" -> (known after apply) # forces replacement
    }
  # module.vpc.aws_route_table_association.private[1] must be replaced
-/+ resource "aws_route_table_association" "private" {
      ~ id             = "rtbassoc-079f04e405eca2ed3" -> (known after apply)
      ~ route_table_id = "rtb-0aabe71401689c1be" -> (known after apply)
      ~ subnet_id      = "subnet-03fe27c23fd3178f3" -> (known after apply) # forces replacement
    }
  # module.vpc.aws_route_table_association.public[0] must be replaced
-/+ resource "aws_route_table_association" "public" {
      ~ id             = "rtbassoc-02af1c10bea83bdd2" -> (known after apply)
      ~ route_table_id = "rtb-000cfffca8956073c" -> (known after apply)
      ~ subnet_id      = "subnet-0951342807d06a0f3" -> (known after apply) # forces replacement
    }
  # module.vpc.aws_route_table_association.public[1] must be replaced
-/+ resource "aws_route_table_association" "public" {
      ~ id             = "rtbassoc-051ff11315ef42d31" -> (known after apply)
      ~ route_table_id = "rtb-000cfffca8956073c" -> (known after apply)
      ~ subnet_id      = "subnet-0da8a20c3f25fcc44" -> (known after apply) # forces replacement
    }

那么也许这可以通过其他方式完成？

Answer 1

没有意识到我需要不同区域的不同工作区来保存 state，关闭。

 app-dev-us = {
  env_name                      = "dev"
  vpc_name                      = "app-vpc-dev"
  vpc_cidr                      = "10.12.0.0/16"
  vpc_azs                       = ["us-west-2a", "us-west-2b"]
  vpc_private_subnets           = ["10.12.60.0/24", "10.12.61.0/24"]
  vpc_public_subnets            = ["10.12.160.0/24", "10.12.161.0/24"]
}
app-dev-eu = {
  env_name                      = "dev"
  vpc_name                      = "app-vpc-dev"
  vpc_cidr                      = "10.13.0.0/16"
  vpc_azs                       = ["eu-central-1a", "eu-central-1b"]
  vpc_private_subnets           = ["10.13.60.0/24", "10.13.61.0/24"]
  vpc_public_subnets            = ["10.13.160.0/24", "10.13.161.0/24"]
}