如何使用 Terraform 将多个 AWS Elastic IP 分配给新创建的 EC2 实例？

Question

使用 terraform，我需要将 3 个弹性 IP 添加到一个新的 EC2 实例。 terraform yml 将创建实例以及 EIP。

我已尝试按如下方式执行此操作：

resource "aws_eip" "server_dev1_eip1" {
  count = length(aws_instance.server_dev1)

  instance = aws_instance.server_dev1.*.id[count.index]
  vpc      = true
  lifecycle {
    prevent_destroy = true
  }
}

resource "aws_eip" "server_dev1_eip2" {
  count = length(aws_instance.server_dev1)

  instance = aws_instance.server_dev1.*.id[count.index]
  vpc      = true
  lifecycle {
    prevent_destroy = true
  }
}

resource "aws_eip" "server_dev1_eip3" {
  count = length(aws_instance.server_dev1)

  instance = aws_instance.server_dev1.*.id[count.index]
  vpc      = true
  lifecycle {
    prevent_destroy = true
  }
}

以上是创建 EIP，但只是将一个 EIP 与实例关联。

请指教

Answer 1

您不能将多个弹性 IP 分配给单个弹性网络接口 (ENI)。默认情况下，一个 EC2 实例只有一个 ENI。您需要将更多 ENI 附加到 EC2 实例，然后将弹性 IP 附加到 ENI。

Answer 2

如何通过 Terraform 将多个 AWS Elastic IP 分配给新创建的多个 EC2 实例

data "aws_ami" "amazon" {
  owners      = ["137112412989"]
  most_recent = true
  filter {
    name   = "name"
    values = ["amzn2-ami-kernel-5.10-hvm-2.0*"]
  }
}

main.tf

module "ec2_instance" {
  source = "terraform-aws-modules/ec2-instance/aws"

  version                = "~> 3.0"
  for_each               = toset(var.ec2_name)
  name                   = each.key
  ami                    = data.aws_ami.amazon.id
  instance_type          = var.instance_type
  iam_instance_profile   = module.iam.name
  key_name               = "super-secret-ssh"
  monitoring             = false
  vpc_security_group_ids = [module.sg.id]
  subnet_id              = module.vpc.public_subnets[0]
  ebs_optimized          = true
}

module "aws_eip" {
  source   = "./modules/eip"
  for_each = toset(var.ec2_name)
  instance = module.ec2_instance[each.key].id
}

模块/eip

resource "aws_eip" "eip" {
  instance = var.instance
  vpc      = true
}

变量.tf

variable "ec2_name" {
  type    = list(string)
  default = ["one", "three" , "whatever"]
}

variable "instance_type" {
  type    = string
  default = t2.micro
}

将创建三个 EC2 实例，每个实例都有一个附加的 AWS 弹性 IP。