AWSTemplateFormatVersion: '2010-09-09'
Description: AWS ParallelCluster CloudFormation Cluster

Parameters:
  KeyName:
    Description: KeyPair to login to the head node
    Type: AWS::EC2::KeyPair::KeyName
    AllowedPattern: ".+"  # Required

  AvailabilityZone:
    Description: Availability zone where instances will be launched
    Type: AWS::EC2::AvailabilityZone::Name
    AllowedPattern: ".+"  # Required

Mappings:
  ParallelCluster:
    Constants:
      Version: 3.8.0
      Bucket: '' # For debug purposes only

Conditions:
  UseCustomBucket: !Not [!Equals [!FindInMap [ParallelCluster, Constants, Bucket], '']]
  GovCloud: !Equals [!Ref AWS::Partition, 'aws-us-gov']
  China: !Equals [!Ref AWS::Partition, 'aws-cn']

Resources:
  PclusterClusterProvider:
    Type: AWS::CloudFormation::Stack
    Properties:
      Parameters:
        CustomBucket: !If [ UseCustomBucket, !FindInMap [ParallelCluster, Constants, Bucket], !Ref AWS::NoValue ]
        AdditionalIamPolicies: !Sub arn:${AWS::Partition}:iam::aws:policy/AmazonSSMManagedInstanceCore
      TemplateURL: !Sub
        - https://${Bucket}.s3.${AWS::Region}.${AWS::URLSuffix}/parallelcluster/${Version}/templates/custom_resource/cluster.yaml
        - { Version: !FindInMap [ParallelCluster, Constants, Version ],
            Bucket: !If [ UseCustomBucket, !FindInMap [ParallelCluster, Constants, Bucket], !Sub "${AWS::Region}-aws-parallelcluster" ]
          }

  PclusterVpc:
    Type: AWS::CloudFormation::Stack
    Properties:
      Parameters:
        PublicCIDR: 10.0.0.0/24
        PrivateCIDR: 10.0.16.0/20
        AvailabilityZone: !Ref AvailabilityZone
      TemplateURL: !Sub
        - https://${Bucket}.s3.${AWS::Region}.${AWS::URLSuffix}/parallelcluster/${Version}/templates/networking/public-private-${Version}.cfn.json
        - { Version: !FindInMap [ParallelCluster, Constants, Version],
            Bucket: !If [ UseCustomBucket, !FindInMap [ParallelCluster, Constants, Bucket], !Sub "${AWS::Region}-aws-parallelcluster" ]
          }

  PclusterCluster:
    Type: Custom::PclusterCluster
    Properties:
      ServiceToken: !GetAtt [ PclusterClusterProvider, Outputs.ServiceToken ]
      ClusterName: !Sub 'c-${AWS::StackName}'
      ClusterConfiguration:
        DevSettings: !If
          - UseCustomBucket
          -
            AmiSearchFilters:
              Owner: self
          - !Ref AWS::NoValue
        Image:
          Os: alinux2
        HeadNode:
          InstanceType: t2.medium
          Networking:
            SubnetId: !GetAtt [ PclusterVpc, Outputs.PublicSubnetId ]
          Ssh:
            KeyName: !Ref KeyName
          Iam:
            AdditionalIamPolicies:
              - Policy: !Sub arn:${AWS::Partition}:iam::aws:policy/AmazonSSMManagedInstanceCore
        Scheduling:
          Scheduler: slurm
          SlurmQueues:
          - Name: queue0
            ComputeResources:
            - Name: queue0-cr0
              InstanceType: t2.micro
            Networking:
              SubnetIds:
              - !GetAtt [ PclusterVpc, Outputs.PrivateSubnetId ]

Outputs:
  HeadNodeIp:
    Description: The Public IP address of the HeadNode
    Value: !GetAtt [ PclusterCluster, headNode.publicIpAddress ]
  SystemManagerUrl:
    Description: URL to access the HeadNode via SystemManager
    Value: !Sub
      - https://${ConsoleDomain}/systems-manager/session-manager/${InstanceId}?region=${AWS::Region}
      - { ConsoleDomain: !If [ GovCloud, 'console.amazonaws-us-gov.com', !If [ China, 'console.amazonaws.cn', !Sub '${AWS::Region}.console.aws.amazon.com']],
          InstanceId: !GetAtt [ PclusterCluster, headNode.instanceId ]
        }
  ValidationMessages:
    Description: Any warnings from cluster create or update operations.
    Value: !GetAtt PclusterCluster.validationMessages