本文介绍如何使用Terraform创建一台ECS实例。

1. 创建VPC网络和交换机。
   1. 创建terraform.tf文件，输入以下内容，并保存在当前的执行目录中。

      resource "alicloud_vpc" "vpc" {
        name       = "tf_test_foo"
        cidr_block = "172.16.0.0/12"
      }
      
      resource "alicloud_vswitch" "vsw" {
        vpc_id            = "${alicloud_vpc.vpc.id}"
        cidr_block        = "172.16.0.0/21"
        availability_zone = "cn-beijing-b"
      }

   2. 运行terraform apply开始创建。
   3. 运行terraform show查看已创建的VPC和VSwitch。
      您也可以登录VPC控制台查看VPC和VSwitch的属性。
2. 创建安全组，并将安全组作用于上一步创建的VPC中。
   1. 在terraform.tf文件中增加以下内容。

      resource "alicloud_security_group" "default" {
        name = "default"
        vpc_id = "${alicloud_vpc.vpc.id}"
      }
      
      resource "alicloud_security_group_rule" "allow_all_tcp" {
        type              = "ingress"
        ip_protocol       = "tcp"
        nic_type          = "intranet"
        policy            = "accept"
        port_range        = "1/65535"
        priority          = 1
        security_group_id = "${alicloud_security_group.default.id}"
        cidr_ip           = "0.0.0.0/0"
      }

   2. 运行terraform apply开始创建。
   3. 运行terraform show查看已创建的安全组和安全组规则。
      您也可以登录ECS控制台查看安全组和安全组规则。
3. 创建ECS实例。
   1. 在terraform.tf文件中增加以下内容。

      resource "alicloud_instance" "instance" {
        # cn-beijing
        availability_zone = "cn-beijing-b"
        security_groups = ["${alicloud_security_group.default.*.id}"]
      
        # series III
        instance_type        = "ecs.n2.small"
        system_disk_category = "cloud_efficiency"
        image_id             = "ubuntu_140405_64_40G_cloudinit_20161115.vhd"
        instance_name        = "test_foo"
        vswitch_id = "${alicloud_vswitch.vsw.id}"
        internet_max_bandwidth_out = 10
        password = "<replace_with_your_password>"
      }

      说明

      • 在上述示例中，指定了internet_max_bandwidth_out = 10，因此会自动为实例分配一个公网IP。
      • 详细的参数解释请参见阿里云参数说明。
   2. 运行terraform apply开始创建。
   3. 运行terraform show查看已创建的ECS实例。
   4. 运行ssh root@<publicip>，并输入密码来访问ECS实例。

provider "alicloud" {}

resource "alicloud_vpc" "vpc" {
  name       = "tf_test_foo"
  cidr_block = "172.16.0.0/12"
}

resource "alicloud_vswitch" "vsw" {
  vpc_id            = "${alicloud_vpc.vpc.id}"
  cidr_block        = "172.16.0.0/21"
  availability_zone = "cn-beijing-b"
}


resource "alicloud_security_group" "default" {
  name = "default"
  vpc_id = "${alicloud_vpc.vpc.id}"
}


resource "alicloud_instance" "instance" {
  # cn-beijing
  availability_zone = "cn-beijing-b"
  security_groups = ["${alicloud_security_group.default.*.id}"]

  # series III
  instance_type        = "ecs.n2.small"
  system_disk_category = "cloud_efficiency"
  image_id             = "ubuntu_140405_64_40G_cloudinit_20161115.vhd"
  instance_name        = "test_foo"
  vswitch_id = "${alicloud_vswitch.vsw.id}"
  internet_max_bandwidth_out = 10
}


resource "alicloud_security_group_rule" "allow_all_tcp" {
  type              = "ingress"
  ip_protocol       = "tcp"
  nic_type          = "intranet"
  policy            = "accept"
  port_range        = "1/65535"
  priority          = 1
  security_group_id = "${alicloud_security_group.default.id}"
  cidr_ip           = "0.0.0.0/0"
}