弹性伸缩：通过Terraform创建弹性伸缩资源

使用的资源

使用Terraform创建弹性伸缩资源

本示例将创建伸缩组、伸缩配置和伸缩规则等弹性伸缩资源

1. 创建一个工作目录，并在该工作目录中创建名为main.tf的配置文件，然后将以下代码复制到main.tf中。

   variable "region" {
     default = "cn-heyuan"
   }
   
   variable "instance_type" {
     default = "ecs.hfc7.xlarge"
   }
   
   variable "image_id" {
     default = "aliyun_2_1903_x64_20G_alibase_20210120.vhd"
   }
   
   variable "zone_id" {
     default = "cn-heyuan-b"
   }
   
   provider "alicloud" {
     region = var.region
   }
   
   #创建专有网络VPC。
   resource "alicloud_vpc" "vpc" {
     vpc_name   = "tf-test-vpc-wjt"
     cidr_block = "172.16.0.0/12" #规划专有网络VPC的私网网段。
   }
   
   #创建专有网络交换机。
   resource "alicloud_vswitch" "vsw" {
     vpc_id       = alicloud_vpc.vpc.id
     cidr_block   = "172.16.0.0/21" #规划交换机的私网网段。
     zone_id      = var.zone_id     #选择交换机的可用区。
     vswitch_name = "tf-test-vswitch-wjt"
   }
   
   #创建一个安全组。
   resource "alicloud_security_group" "security" {
     name        = "tf_test_security"
     description = "New security group"
     vpc_id      = alicloud_vpc.vpc.id
   }
   
   #并为该安全组添加一个允许任何地址访问的安全组规则。
   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.security.id
     cidr_ip           = "0.0.0.0/0"
   }
   
   #本示例以创建最大实例数为100的伸缩组为例。
   resource "alicloud_ess_scaling_group" "group" {
     scaling_group_name = "tf_test_scalinggroup"
     min_size           = 0
     max_size           = 100
     vswitch_ids        = [alicloud_vswitch.vsw.id]
   }
   
   #本示例以创建ECS类型的伸缩配置为例。
   resource "alicloud_ess_scaling_configuration" "configuration" {
     scaling_group_id           = alicloud_ess_scaling_group.group.id
     instance_type              = var.instance_type
     image_id                   = var.image_id
     security_group_id          = alicloud_security_group.security.id
     scaling_configuration_name = "tf_test_scalingconfiguration"
     system_disk_category       = "cloud_essd"
     spot_strategy              = "SpotWithPriceLimit"
     active                     = true
     force_delete               = true
   }
   
   #创建伸缩规则
   resource "alicloud_ess_scaling_rule" "rule" {
     scaling_group_id = alicloud_ess_scaling_group.group.id
     adjustment_type  = "QuantityChangeInCapacity"
     adjustment_value = 1
   }

2. 执行以下命令，初始化Terraform运行环境。

   terraform init

   返回如下信息，表示Terraform初始化成功。

   Initializing the backend...
   
   Initializing provider plugins...
   - Checking for available provider plugins...
   - Downloading plugin for provider "alicloud" (hashicorp/alicloud) 1.90.1...
   ...
   
   You may now begin working with Terraform. Try running "terraform plan" to see
   any changes that are required for your infrastructure. All Terraform commands
   should now work.
   
   If you ever set or change modules or backend configuration for Terraform,
   rerun this command to reinitialize your working directory. If you forget, other
   commands will detect it and remind you to do so if necessary.

3. 创建执行计划，并预览变更。

   terraform plan

4. 执行以下命令，创建资源。

   terraform apply

   在执行过程中，根据提示输入yes并按下Enter键，等待命令执行完成，若出现以下信息，则表示弹性伸缩资源创建成功。

   Do you want to perform these actions?
     Terraform will perform the actions described above.
     Only 'yes' will be accepted to approve.
   
     Enter a value: yes
   
   ...
   alicloud_security_group_rule.allow_all_tcp: Creation complete after 0s [id=sg-f8z1mes******:ingress:tcp:1/65535:intranet:0.0.0.0/0:accept:1]
   alicloud_vswitch.vsw: Creation complete after 3s [id=vsw-f8ztgc4******]
   alicloud_ess_scaling_group.group: Creating...
   alicloud_ess_scaling_group.group: Creation complete after 2s [id=asg-f8z9mo******]
   ...
   
   Apply complete! Resources: 7 added, 0 changed, 0 destroyed.

5. 验证结果

   执行terraform show命令

   您可以使用以下命令查询Terraform已创建的资源详细信息：

   terraform show

   

   登录弹性伸缩管理控制台

   登录弹性伸缩管理控制台，查看已创建的弹性伸缩组。

   

清理资源

当您不再需要上述通过Terraform创建或管理的资源时，请运行以下命令以释放资源。关于terraform destroy的更多信息，请参见Terraform常用命令。

terraform destroy

variable "region" {
  default = "cn-heyuan"
}

variable "instance_type" {
  default = "ecs.hfc7.xlarge"
}

variable "image_id" {
  default = "aliyun_2_1903_x64_20G_alibase_20210120.vhd"
}

variable "zone_id" {
  default = "cn-heyuan-b"
}

provider "alicloud" {
  region = var.region
}

#创建专有网络VPC。
resource "alicloud_vpc" "vpc" {
  vpc_name   = "tf-test-vpc-wjt"
  cidr_block = "172.16.0.0/12" #规划专有网络VPC的私网网段。
}

#创建专有网络交换机。
resource "alicloud_vswitch" "vsw" {
  vpc_id       = alicloud_vpc.vpc.id
  cidr_block   = "172.16.0.0/21" #规划交换机的私网网段。
  zone_id      = var.zone_id     #选择交换机的可用区。
  vswitch_name = "tf-test-vswitch-wjt"
}

#创建一个安全组。
resource "alicloud_security_group" "security" {
  name        = "tf_test_security"
  description = "New security group"
  vpc_id      = alicloud_vpc.vpc.id
}

#并为该安全组添加一个允许任何地址访问的安全组规则。
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.security.id
  cidr_ip           = "0.0.0.0/0"
}

#本示例以创建最大实例数为100的伸缩组为例。
resource "alicloud_ess_scaling_group" "group" {
  scaling_group_name = "tf_test_scalinggroup"
  min_size           = 0
  max_size           = 100
  vswitch_ids        = [alicloud_vswitch.vsw.id]
}

#本示例以创建ECS类型的伸缩配置为例。
resource "alicloud_ess_scaling_configuration" "configuration" {
  scaling_group_id           = alicloud_ess_scaling_group.group.id
  instance_type              = var.instance_type
  image_id                   = var.image_id
  security_group_id          = alicloud_security_group.security.id
  scaling_configuration_name = "tf_test_scalingconfiguration"
  system_disk_category       = "cloud_essd"
  spot_strategy              = "SpotWithPriceLimit"
  active                     = true
  force_delete               = true
}

#创建伸缩规则
resource "alicloud_ess_scaling_rule" "rule" {
  scaling_group_id = alicloud_ess_scaling_group.group.id
  adjustment_type  = "QuantityChangeInCapacity"
  adjustment_value = 1
}