如何在 Terraform 上使用 cloud-init 初始化实例

Posted 2023-03-24

【中文标题】如何在 Terraform 上使用 cloud-init 初始化实例

【英文标题】：How can I initialice an instance with cloud-init on Terraform

【发布时间】：2017-09-01 08:31:27

【问题描述】：

我正在尝试使用 cloud-init 初始化 AWS 实例，我使用下一个 terraform 代码进行测试：

variable "hostname"    
variable "domain_name" 


variable "filename" 
  default = "cloud-config.cfg"


data "template_file" "test" 
  template = <<EOF
#cloud-config
hostname: $$hostname
fqdn: $$fqdn
mounts:
  - [ ephemeral, null ]
output:
  all: '| tee -a /var/log/cloud-init-output.log'
EOF

  vars 
    hostname = "$var.hostname"
    fqdn     = "$format("%s.%s", var.hostname, var.domain_name)"
  


data "template_cloudinit_config" "test" 
  gzip          = false
  base64_encode = false

  part 
    filename     = "$var.filename"
    content_type = "text/cloud-config"
    content      = "$data.template_file.test.rendered"
  



resource "aws_instance" "bootstrap2" 
    ami = "$var.aws_centos_ami"
    availability_zone = "eu-west-1b"
    instance_type = "t2.micro"
    key_name = "$var.aws_key_name"
    security_groups = ["$aws_security_group.bastion.id"]
    associate_public_ip_address = true
    private_ip = "10.0.0.12"
    source_dest_check = false
    subnet_id = "$aws_subnet.eu-west-1b-public.id"
    triggers 
      template = "$data.template_file.test.rendered"
    

    tags 
            Name = "bootstrap2"
        

但它使“引导”资源内的触发器失败。那么如何使用我定义的云配置来配置此实例？

【参考方案1】：

triggers 不是aws_instance 资源的有效参数。将配置传递给cloud-init 的常用方法是通过user_data 参数，如下所示：

resource "aws_instance" "bootstrap2" 
  ami = "$var.aws_centos_ami"
  availability_zone = "eu-west-1b"
  instance_type = "t2.micro"
  key_name = "$var.aws_key_name"
  security_groups = ["$aws_security_group.bastion.id"]
  associate_public_ip_address = true
  private_ip = "10.0.0.12"
  source_dest_check = false
  subnet_id = "$aws_subnet.eu-west-1b-public.id"

  # Pass templated configuration to cloud-init
  user_data = "$data.template_file.test.rendered"

  tags 
    Name = "bootstrap2"