amazon-web-services - 使用提供商在多个区域部署 Terraform 资源

Question

我正在尝试使用提供商跨多个区域部署相同的实例。 文件夹的树是:

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

main.tf 看起来像:

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

aws_instance/main.tf 看起来像:

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 看起来像:

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"
}

使用当前代码，我只在一个区域部署了实例。这里有什么可能出错的提示吗？

Answer 1

指定

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

不会创建两个实例。它只是将两个别名传递给您的模块。但是模块仍然只被调用一次。由于您无法循环提供程序，因此您必须明确选择要为每个实例使用的提供程序。这意味着，代码重复。所以你要么必须在模块中有两个实例定义:

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
}

或者或者，调用模块两次:

ma​​in.tf

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

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