使用Terraform创建Kubernetes托管版集群

使用Terraform创建ACK托管版集群

1. 创建一个工作目录，并且在工作目录中创建以下名为main.tf的配置文件。
   main.tf文件描述了以下的Terraform配置：

   • 创建一个新的VPC，以及相关VSwitch。
   • 创建一个托管版ACK集群，包含2个Worker节点。

   provider "alicloud" {
   }
   variable "k8s_name_prefix" {
     description = "The name prefix used to create managed kubernetes cluster."
     default     = "tf-ack"
   }
   resource "random_uuid" "this" {}
   # 默认资源名称。
   locals {
     k8s_name     = substr(join("-", [var.k8s_name_prefix, random_uuid.this.result]), 0, 63)
     new_vpc_name = "vpc-for-${local.k8s_name}"
     new_vsw_name = "vsw-for-${local.k8s_name}"
     log_project_name = "log-for-${local.k8s_name}"
   }
   # 节点ECS实例配置。
   data "alicloud_instance_types" "default" {
     cpu_core_count       = 4
     memory_size          = 8
     kubernetes_node_role = "Worker"
   }
   // 满足实例规格的AZ。
   data "alicloud_zones" "default" {
     available_instance_type = data.alicloud_instance_types.default.instance_types[0].id
   }
   # 专有网络。
   resource "alicloud_vpc" "default" {
     name       = local.new_vpc_name
     cidr_block = "10.1.0.0/21"
   }
   # 交换机。
   resource "alicloud_vswitch" "vswitches" {
     name              = local.new_vsw_name
     vpc_id            = alicloud_vpc.default.id
     cidr_block        = "10.1.1.0/24"
     availability_zone = data.alicloud_zones.default.zones[0].id
   }
   # 日志服务。
   resource "alicloud_log_project" "log" {
     name        = local.log_project_name
     description = "created by terraform for managedkubernetes cluster"
   }
   # Kubernetes托管版。
   resource "alicloud_cs_managed_kubernetes" "default" {
     # Kubernetes集群名称。
     name                      = local.k8s_name
     # 新的Kubernetes集群将位于的vswitch。指定一个或多个vswitch的ID。它必须在availability_zone指定的区域中。
     worker_vswitch_ids        = split(",", join(",", alicloud_vswitch.vswitches.*.id))
     # 是否在创建kubernetes集群时创建新的nat网关。默认为true。
     new_nat_gateway           = true
     # 节点的ECS实例类型。
     worker_instance_types     = [data.alicloud_instance_types.default.instance_types[0].id]
     # Kubernetes群集的总工作节点数。默认值为3。最大限制为50。
     worker_number             = 2
     # ssh登录群集节点的密码。
     password                  = "Yourpassword1234"
     # pod网络的CIDR块。当cluster_network_type设置为flannel，你必须设定该参数。它不能与VPC CIDR相同，并且不能与VPC中的Kubernetes群集使用的CIDR相同，也不能在创建后进行修改。群集中允许的最大主机数量：256。
     pod_cidr                  = "172.20.0.0/16"
     # 服务网络的CIDR块。它不能与VPC CIDR相同，不能与VPC中的Kubernetes群集使用的CIDR相同，也不能在创建后进行修改。
     service_cidr              = "172.21.0.0/20"
     # 是否为kubernetes的节点安装云监控。
     install_cloud_monitor     = true
     # 是否为API Server创建Internet负载均衡。默认为false。
     slb_internet_enabled      = true
     # 节点的系统磁盘类别。其有效值为cloud_ssd和cloud_efficiency。默认为cloud_efficiency。
     worker_disk_category      = "cloud_efficiency"
     # 节点的数据磁盘类别。其有效值为cloud_ssd和cloud_efficiency，如果未设置，将不会创建数据磁盘。
     worker_data_disk_category = "cloud_ssd"
     # 节点的数据磁盘大小。有效值范围[20〜32768]，以GB为单位。当worker_data_disk_category被呈现，则默认为40。
     worker_data_disk_size     = 200
     # 日志配置。
     addons {
       name     = "logtail-ds"
       config   = "{\"IngressDashboardEnabled\":\"true\",\"sls_project_name\":alicloud_log_project.log.name}"
     }
   }

2. 执行以下命令初始化Terraform运行环境。

   terraform init

   输出：

   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. 执行以下命令生成资源规划。

   terraform plan

   输出：

   Refreshing Terraform state in-memory prior to plan...
   The refreshed state will be used to calculate this plan, but will not be
   persisted to local or remote state storage.
   ...
   Plan: 5 to add, 0 to change, 0 to destroy.
   ...

4. 执行以下命令创建集群。

   terraform apply

   输出：

   ...
   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_cs_managed_kubernetes.default: Creation complete after 8m26s [id=************]
   
   Apply complete! Resources: 5 added, 0 changed, 0 destroyed.

使用Terraform删除ACK托管版集群

terraform destroy

...
Do you really want to destroy all resources?
  Terraform will destroy all your managed infrastructure, as shown above.
  There is no undo. Only 'yes' will be accepted to confirm.

  Enter a value: yes
...
Destroy complete! Resources: 5 destroyed.