使用 Terraform 创建集群

创建一个名为的目录my-clusters。

您创建的所有文件都将位于此目录中。

创建文件terraform.tf以导入 ParallelCluster 提供程序。

terraform {
  required_version = ">= 1.5.7"
  required_providers {
    aws-parallelcluster = {
      source  = "aws-tf/aws-parallelcluster"
      version = "1.0.0"
    }
  }
}

创建文件providers.tf以配置 ParallelCluster 和 Amazon 提供程序。

provider "aws" {
  region  = var.region
  profile = var.profile
}

provider "aws-parallelcluster" {
  region         = var.region
  profile        = var.profile
  api_stack_name = var.api_stack_name
  use_user_role  = true
}

使用 ParallelCluster模块创建文件main.tf以定义资源。

module "pcluster" {
  source  = "aws-tf/parallelcluster/aws"
  version = "1.0.0"

  region                = var.region
  api_stack_name        = var.api_stack_name
  api_version           = var.api_version
  deploy_pcluster_api   = false

  template_vars         = local.config_vars
  cluster_configs       = local.cluster_configs
  config_path           = "config/clusters.yaml"
}

创建文件clusters.tf以将多个集群定义为 Terraform 局部变量。

要查看可在配置元素中设置的群集属性，请参阅集群配置文件。

要查看您可以为创建集群设置的选项，请参阅pcluster create-cluster。

locals {
  cluster_configs = {
    DemoCluster01 : {
      region : local.config_vars.region
      rollbackOnFailure : false
      validationFailureLevel : "WARNING"
      suppressValidators : [
        "type:KeyPairValidator"
      ]
      configuration : {
        Region : local.config_vars.region
        Image : {
          Os : "alinux2"
        }
        HeadNode : {
          InstanceType : "t3.small"
          Networking : {
            SubnetId : local.config_vars.subnet
          }
          Iam : {
            AdditionalIamPolicies : [
              { Policy : "arn:aws:iam::aws:policy/AmazonSSMManagedInstanceCore" }
            ]
          }
        }
        Scheduling : {
          Scheduler : "slurm"
          SlurmQueues : [{
            Name : "queue1"
            CapacityType : "ONDEMAND"
            Networking : {
              SubnetIds : [local.config_vars.subnet]
            }
            Iam : {
              AdditionalIamPolicies : [
                { Policy : "arn:aws:iam::aws:policy/AmazonSSMManagedInstanceCore" }
              ]
            }
            ComputeResources : [{
              Name : "compute"
              InstanceType : "t3.small"
              MinCount : "1"
              MaxCount : "4"
            }]
          }]
          SlurmSettings : {
            QueueUpdateStrategy : "TERMINATE"
          }
        }
      }
    }
    DemoCluster02 : {
      configuration : "config/cluster_config.yaml"
    }
  }
}

创建文件config/clusters.yaml以将多个集群定义为 YAML 配置。

DemoCluster03:
  region: ${region}
  rollbackOnFailure: true
  validationFailureLevel: WARNING
  suppressValidators:
    - type:KeyPairValidator
  configuration: config/cluster_config.yaml
DemoCluster04:
  region: ${region}
  rollbackOnFailure: false
  configuration: config/cluster_config.yaml

创建文件config/cluster_config.yaml，这是一个标准 ParallelCluster 配置文件，可以在其中注入 Terraform 变量。

要查看可在配置元素中设置的群集属性，请参阅集群配置文件。

Region: ${region}
Image:
 Os: alinux2
HeadNode:
 InstanceType: t3.small
 Networking:
   SubnetId: ${subnet}
 Iam:
   AdditionalIamPolicies:
     - Policy: arn:aws:iam::aws:policy/AmazonSSMManagedInstanceCore
Scheduling:
 Scheduler: slurm
 SlurmQueues:
   - Name: queue1
     CapacityType: ONDEMAND
     Networking:
       SubnetIds:
         - ${subnet}
     Iam:
       AdditionalIamPolicies:
         - Policy: arn:aws:iam::aws:policy/AmazonSSMManagedInstanceCore
     ComputeResources:
       - Name: compute
         InstanceType: t3.small
         MinCount: 1
         MaxCount: 5
 SlurmSettings:
   QueueUpdateStrategy: TERMINATE

创建文件clusters_vars.tf以定义可以注入到集群配置中的变量。

此文件允许您定义可在集群配置中使用的动态值，例如区域和子网。

此示例直接从项目变量中检索值，但您可能需要使用自定义逻辑来确定它们。

locals {
  config_vars = {
    subnet = var.subnet_id
    region = var.cluster_region
  }
}

创建文件variables.tf以定义可以为此项目注入的变量。

variable "region" {
  description = "The region the ParallelCluster API is deployed in."
  type        = string
  default     = "us-east-1"
}

variable "cluster_region" {
  description = "The region the clusters will be deployed in."
  type        = string
  default     = "us-east-1"
}

variable "profile" {
  type        = string
  description = "The AWS profile used to deploy the clusters."
  default     = null
}

variable "subnet_id" {
  type        = string
  description = "The id of the subnet to be used for the ParallelCluster instances."
}

variable "api_stack_name" {
  type        = string
  description = "The name of the CloudFormation stack used to deploy the ParallelCluster API."
  default     = "ParallelCluster"
}

variable "api_version" {
  type        = string
  description = "The version of the ParallelCluster API."
}

创建文件terraform.tfvars以设置变量的任意值。

下面的文件使用现有 ParallelCluster API 3.10.0 在子网eu-west-1中部署集群subnet-123456789，该API 3.10.0 已使用堆栈名称部署在子网中us-east-1。MyParallelClusterAPI-310

region = "us-east-1"
api_stack_name = "MyParallelClusterAPI-310"
api_version = "3.10.0"

cluster_region = "eu-west-1"
subnet_id = "subnet-123456789"

创建文件outputs.tf以定义此项目返回的输出。

output "clusters" {
  value = module.pcluster.clusters
}

项目目录是：

my-clusters
├── config
│   ├── cluster_config.yaml - Cluster configuration, where terraform variables can be injected..
│   └── clusters.yaml - File listing all the clusters to deploy.
├── clusters.tf - Clusters defined as Terraform local variables.
├── clusters_vars.tf - Variables that can be injected into cluster configurations.
├── main.tf - Terraform entrypoint where the ParallelCluster module is configured.
├── outputs.tf - Defines the cluster as a Terraform output.
├── providers.tf - Configures the providers: ParallelCluster and AWS.
├── terraform.tf - Import the ParallelCluster provider.
├── terraform.tfvars - Defines values for variables, e.g. region, PCAPI stack name.
└── variables.tf - Defines the variables, e.g. region, PCAPI stack name.

构建项目：

terraform init

定义部署计划：

terraform plan -out tfplan

部署计划：

terraform apply tfplan