使用提供商在多個區域部署 Terraform 資源

Question

我正在嘗試使用提供商跨多個區域部署相同的實例。 文件夾的樹是：

.
|-- main.tf
`-- aws_instance
|   `-- main.tf
`-- versions.tf

main.tf 看起來像：

module "aws_instances" {
  source  = "./aws_instance"
  providers = {
    aws.east1 = aws.east1
    aws.east2 = aws.east2
  }
}

aws_instance/main.tf 看起來像：

resource "aws_instance" "webserver" {
  ami = "webserver-image"
  instance_type = "t2.micro"
  key_name = "EC2-keyPair-Name"
  associate_public_ip_address = true
  root_block_device {
    volume_type = "gp2"
    volume_size = "30"
    delete_on_termination = false
}

versions.tf 看起來像：

terraform {
  required_version = ">= 1.0.4"
  required_providers {
    aws = {
      source  = "hashicorp/aws"
      version = ">= 3.23.0"
      configuration_aliases = [aws.east1, aws.east2]
    }
  }
}

provider "aws" {
  region  = "us-east-1"
  alias   = "east1"
}

provider "aws" {
  region  = "us-east-2"
  alias   = "east2"
}

使用當前代碼，我只在一個區域部署了實例。 這里有什么可能出錯的提示嗎？

Answer 1

指定

  providers = {
    aws.east1 = aws.east1
    aws.east2 = aws.east2
  }

不會創建兩個實例。 它只是將兩個別名傳遞給您的模塊。 但是模塊仍然只被調用一次。 由於您無法遍歷提供者，因此您必須明確選擇要為每個實例使用的提供者。 這意味着，代碼重復。 所以你要么必須在模塊中有兩個實例定義：

aws_instance/main.tf

resource "aws_instance" "webserver1" {
  ami = "webserver-image"
  instance_type = "t2.micro"
  key_name = "EC2-keyPair-Name"
  associate_public_ip_address = true
  root_block_device {
    volume_type = "gp2"
    volume_size = "30"
    delete_on_termination = false

  provider = aws.east1
}

resource "aws_instance" "webserver2" {
  ami = "webserver-image"
  instance_type = "t2.micro"
  key_name = "EC2-keyPair-Name"
  associate_public_ip_address = true
  root_block_device {
    volume_type = "gp2"
    volume_size = "30"
    delete_on_termination = false

  provider = aws.east2
}

或者，調用模塊兩次：

主程序

module "aws_instance1" {
  source  = "./aws_instance"
  providers = {
    aws = aws.east1
  }
}

module "aws_instance2" {
  source  = "./aws_instance"
  providers = {
    aws = aws.east2
  }
}