本文介绍如何使用Terraform模块批量创建多台ECS实例。

前提条件

在开始之前，请您确保完成以下操作：

操作步骤

  1. 创建专有网络和交换机。
    1. 创建terraform.tf文件，输入以下内容，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查看已创建的专有网络和交换机。

      您也可以登录VPC控制台查看专有网络和交换机的属性。

  2. 在上一步创建的专有网络中创建一个安全组，并添加一个允许任何地址访问的安全组规则。
    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. 使用Module创建多台ECS实例。在本示例中，创建3台ECS实例。
    1. 在terraform.tf文件中增加以下内容。 
      module "tf-instances" {  
 source                      = "alibaba/ecs-instance/alicloud"  
 region                      = "cn-beijing" 
 number_of_instances         = "3" 
 vswitch_id                  = alicloud_vswitch.vsw.id  
 group_ids                   = [alicloud_security_group.default.id]  
 private_ips                 = ["172.16.0.10", "172.16.0.11", "172.16.0.12"]  
 image_ids                   = ["ubuntu_18_04_64_20G_alibase_20190624.vhd"]  
 instance_type               = "ecs.n2.small"   
 internet_max_bandwidth_out  = 10  
 associate_public_ip_address = true  
 instance_name               = "my_module_instances_"  
 host_name                   = "sample"  
 internet_charge_type        = "PayByTraffic"    
 password                    = "User@123"  
 system_disk_category        = "cloud_ssd"  
 data_disks = [    
  {      
    disk_category = "cloud_ssd"      
    disk_name     = "my_module_disk"      
    disk_size     = "50"    
  } 
 ]
}
      说明 在上述示例中，同时指定associate_public_ip_address = true和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 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。

操作样例

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_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"
}

module "tf-instances" {  
 source                      = "alibaba/ecs-instance/alicloud"  
 region                      = "cn-beijing"  
 number_of_instances         = "3"  
 vswitch_id                  = alicloud_vswitch.vsw.id  
 group_ids                   = [alicloud_security_group.default.id]  
 private_ips                 = ["172.16.0.10", "172.16.0.11", "172.16.0.12"]  
 image_ids                   = ["ubuntu_18_04_64_20G_alibase_20190624.vhd"]  
 instance_type               = "ecs.n2.small"   
 internet_max_bandwidth_out  = 10
 associate_public_ip_address = true  
 instance_name               = "my_module_instances_"  
 host_name                   = "sample"  
 internet_charge_type        = "PayByTraffic"   
 password                    = "User@123" 
 system_disk_category        = "cloud_ssd"  
 data_disks = [    
  {      
    disk_category = "cloud_ssd"      
    disk_name     = "my_module_disk"      
    disk_size     = "50"    
  } 
 ]
}