Auto Scaling：通過Terraform建立Auto Scaling資源

使用的資源

使用Terraform建立Auto Scaling資源

本樣本將建立伸縮組、伸縮配置和伸縮規則等Auto Scaling資源

1. 建立一個工作目錄，並在該工作目錄中建立名為main.tf的設定檔，然後將以下代碼複製到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
   }
   
   #建立Virtual Private Cloud。
   resource "alicloud_vpc" "vpc" {
     vpc_name   = "tf-test-vpc-wjt"
     cidr_block = "172.16.0.0/12" #規劃Virtual Private Cloud的私網網段。
   }
   
   #建立專用網路交換器。
   resource "alicloud_vswitch" "vsw" {
     vpc_id       = alicloud_vpc.vpc.id
     cidr_block   = "172.16.0.0/21" #規劃交換器的私網網段。
     zone_id      = var.zone_id     #選擇交換器的可用性區域。
     vswitch_name = "tf-test-vswitch-wjt"
   }
   
   #建立一個安全性群組。
   resource "alicloud_security_group" "security" {
     name        = "tf_test_security"
     description = "New security group"
     vpc_id      = alicloud_vpc.vpc.id
   }
   
   #並為該安全性群組添加一個允許任何地址訪問的安全性群組規則。
   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"
   }
   
   #本樣本以建立最大執行個體數為100的伸縮組為例。
   resource "alicloud_ess_scaling_group" "group" {
     scaling_group_name = "tf_test_scalinggroup"
     min_size           = 0
     max_size           = 100
     vswitch_ids        = [alicloud_vswitch.vsw.id]
   }
   
   #本樣本以建立ECS類型的伸縮配置為例。
   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
   }
   
   #建立伸縮規則
   resource "alicloud_ess_scaling_rule" "rule" {
     scaling_group_id = alicloud_ess_scaling_group.group.id
     adjustment_type  = "QuantityChangeInCapacity"
     adjustment_value = 1
   }

2. 執行以下命令，初始化Terraform運行環境。

   terraform init

   返回如下資訊，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. 建立執行計畫，並預覽變更。

   terraform plan

4. 執行以下命令，建立資源。

   terraform apply

   在執行過程中，根據提示輸入yes並按下Enter鍵，等待命令執行完成，若出現以下資訊，則表示Auto Scaling資源建立成功。

   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. 驗證結果

   執行terraform show命令

   您可以使用以下命令查詢Terraform已建立的資來源詳細資料：

   terraform show

   

   登入Auto Scaling管理主控台

   登入Auto Scaling管理主控台，查看已建立的Auto Scaling組。

   

清理資源

當您不再需要上述通過Terraform建立或管理的資源時，請運行以下命令以釋放資源。關於terraform destroy的更多資訊，請參見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
}

#建立Virtual Private Cloud。
resource "alicloud_vpc" "vpc" {
  vpc_name   = "tf-test-vpc-wjt"
  cidr_block = "172.16.0.0/12" #規劃Virtual Private Cloud的私網網段。
}

#建立專用網路交換器。
resource "alicloud_vswitch" "vsw" {
  vpc_id       = alicloud_vpc.vpc.id
  cidr_block   = "172.16.0.0/21" #規劃交換器的私網網段。
  zone_id      = var.zone_id     #選擇交換器的可用性區域。
  vswitch_name = "tf-test-vswitch-wjt"
}

#建立一個安全性群組。
resource "alicloud_security_group" "security" {
  name        = "tf_test_security"
  description = "New security group"
  vpc_id      = alicloud_vpc.vpc.id
}

#並為該安全性群組添加一個允許任何地址訪問的安全性群組規則。
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"
}

#本樣本以建立最大執行個體數為100的伸縮組為例。
resource "alicloud_ess_scaling_group" "group" {
  scaling_group_name = "tf_test_scalinggroup"
  min_size           = 0
  max_size           = 100
  vswitch_ids        = [alicloud_vswitch.vsw.id]
}

#本樣本以建立ECS類型的伸縮配置為例。
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
}

#建立伸縮規則
resource "alicloud_ess_scaling_rule" "rule" {
  scaling_group_id = alicloud_ess_scaling_group.group.id
  adjustment_type  = "QuantityChangeInCapacity"
  adjustment_value = 1
}