foo.yml

Parameters:
  SubnetId:
    Type: AWS::EC2::Subnet::Id
    Description: "The list of SubnetIds, for at least two Availability Zones in the region in your Virtual Private Cloud (VPC)"
    Default: "subnet-xxxxx"
  AvailabilityZone:
    Type: AWS::EC2::AvailabilityZone::Name
    Description: "The availability zone to use. You may want to change this to find an AZ with the appropriate capacity."
    Default: "us-gov-west-1a"
  ImageId:
    Type: AWS::EC2::Image::Id
    Default: "ami-1234566"
    Description: "Image ID for AMI"
  InstanceType:
    Type: String
    Default: c4.8xlarge
    AllowedValues:
      - c4.xlarge
      - c4.2xlarge
      - c4.4xlarge
      - c4.8xlarge
    Description: "The EC2 instance type to use for all instances in the cluster."
  KeyPair:
    Type: AWS::EC2::KeyPair::KeyName
    Description: "The EC2 KeyPair to launch the instances with."
    Default: "mykey"
  InstanceCount:
    Type: Number
    Description: "Number of EC2 instances to request in the Autoscaling group. This is in addition to the first instance."
    MinValue: 0
    MaxValue: 100
    Default: 3
  InstanceSecurityGroup:
    Type: AWS::EC2::SecurityGroup::Id
    Default: "sg-xxxxx"
Resources:
  FirstInstance:
    Type: AWS::EC2::Instance
    Properties:
      ImageId: !Ref ImageId
      InstanceType: !Ref InstanceType
      KeyName: !Ref KeyPair
      PlacementGroupName: !Ref PlacementGroup
      SecurityGroupIds:
        - !Ref InstanceSecurityGroup
      SubnetId: !Ref SubnetId
      Tags:
        - Key: Name
          Value: "MyClusterTag"
      UserData:
        Fn::Base64: !Sub |
          #!/bin/bash

          # Set up the filesystem
          mount -t nfs -o rsize=1048576,wsize=1048576,hard,timeo=600,retrans=2,_netdev 10.10.10.1:/media/datasets /efs

          sleep 10

          # selinux is enforcing and requires this change to allow NFS home directories.
          setsebool -P use_nfs_home_dirs 1

          #LSH START
          # First instance only
          # Populate the home folder

          
  LaunchConfig:
    Type: AWS::AutoScaling::LaunchConfiguration
    Properties:
      ImageId: !Ref ImageId
      InstanceType: !Ref InstanceType
      KeyName: !Ref KeyPair
      SecurityGroups:
        - !Ref InstanceSecurityGroup
      UserData:
        Fn::Base64: !Sub |
          #!/bin/bash

          # Set up the filesystem
          mount -t nfs -o rsize=1048576,wsize=1048576,hard,timeo=600,retrans=2,_netdev 10.10.10.1:/media/datasets /efs

          sleep 10

          # selinux is enforcing and requires this change to allow NFS home directories.
          setsebool -P use_nfs_home_dirs 1

          #LSH START
          # First instance only
          # Populate the home folder

  AutoScalingGroup:
    Type: AWS::AutoScaling::AutoScalingGroup
    Properties:
      LaunchConfigurationName: !Ref LaunchConfig
      PlacementGroup: !Ref PlacementGroup
      MinSize: !Ref InstanceCount
      MaxSize: !Ref InstanceCount
      VPCZoneIdentifier:
        - !Ref SubnetId