root.json

{
  "AWSTemplateFormatVersion": "2010-09-09",
  "Description": "AWS CloudFormation Root stack",
  "Metadata": {
    "AWS::CloudFormation::Interface": {
      "ParameterGroups": [
        {
          "Label": {
            "default": "Template Parameters"
          },
          "Parameters": [
            "templateBucketURL"
          ]
        },
        {
          "Label": {
            "default": "VPC Parameters"
          },
          "Parameters": [
            "vpcCIDR"
          ]
        },
        {
          "Label": {
            "default": "Security Group Parameters"
          },
          "Parameters": [
            "allowedCIDR"
          ]
        },
        {
          "Label": {
            "default": "Spot Fleet Parameters"
          },
          "Parameters": [
            "spotFleetS3BucketName",
            "spotFleetInstanceType",
            "spotFleetPrice",
            "spotFleetMaximumCapacity",
            "spotFleetTargetCapacity",
            "spotFleetAllocationStrategy",
            "spotFleetRequestType",
            "spotFleetKeyPairName",
            "spotFleetUserData"
          ]
        }
      ]
    }
  },
  "Parameters": {
    "templateBucketURL": {
      "Type": "String",
      "Default": "https://<S3BucketName>.s3-us-west-2.amazonaws.com/",
      "AllowedPattern": ".+",
      "Description": "URL to an S3 Bucket, joined with template filename. [https://my-bucket.s3-us-west-2.amazonaws.com/]"
    },
    "vpcCIDR": {
      "Type": "String",
      "Default": "172.21.0.0/16",
      "AllowedPattern": "^(\\d{1,3})\\.(\\d{1,3})\\.(\\d{1,3})\\.(\\d{1,3})/(\\d{1,2})",
      "Description": "CIDR Range for the VPC"
    },
    "allowedCIDR": {
      "Type": "String",
      "Default": "0.0.0.0/0",
      "AllowedPattern": "^(\\d{1,3})\\.(\\d{1,3})\\.(\\d{1,3})\\.(\\d{1,3})/(\\d{1,2})",
      "Description": "Allowed CIDR Range to be used in the security group"
    },
    "spotFleetS3BucketName": {
      "Type": "String",
      "Default": "my-bucket-name",
      "AllowedPattern": ".+",
      "Description": "Allow Spot Fleet instances access to the specified S3 bucket"
    },
    "spotFleetInstanceType": {
      "Type": "String",
      "Default": "p3.2xlarge",
      "AllowedValues": ["p3.2xlarge", "p2.8xlarge"],
      "Description": "Spot Fleet Instance type.\n Accelerated Computing instance types [https://aws.amazon.com/ec2/instance-types/]"
    },
    "spotFleetPrice": {
      "Type": "Number",
      "Default": 0.918,
      "Description": "The maximum price per unit hour that you are willing to pay for a Spot Instance. The default is the On-Demand price"
    },
    "spotFleetMaximumCapacity": {
      "Type": "Number",
      "Default": 2,
      "Description": "The maximum number of units to request for the Spot Fleet"
    },
    "spotFleetTargetCapacity": {
      "Type": "Number",
      "Default": 1,
      "Description": "The number of units to request for the Spot Fleet"
    },
    "spotFleetAllocationStrategy": {
      "Type": "String",
      "Default": "lowestPrice",
      "AllowedValues": ["capacityOptimized","diversified" ,"lowestPrice"],
      "Description": "Indicates how to allocate the target Spot Instance capacity across the Spot Instance pools specified by the Spot Fleet request"
    },
    "spotFleetRequestType": {
      "Type": "String",
      "Default": "maintain",
      "AllowedValues": ["instant","maintain" ,"request"],
      "Description": "One of [instant | maintain | request]"
    },
    "spotFleetKeyPairName": {
      "Type": "AWS::EC2::KeyPair::KeyName",
      "Description": "EC2 KeyPair name for the Spot Fleet"
    },
    "spotFleetUserData": {
      "Type": "String",
      "Default": "#!/bin/bash -c 'echo Hello!'",
      "Description": "Commands to execute after the instance starts"
    }
  },
  "Resources": {
    "s3Stack": {
      "Type": "AWS::CloudFormation::Stack",
      "Properties": {
        "TemplateURL": { "Fn::Join": ["", [{ "Ref": "templateBucketURL"}, "s3.json"]]},
        "TimeoutInMinutes" : 5,
        "Parameters": {
          "s3BucketNamePrefix": { "Ref": "s3BucketNamePrefix" },
          "s3BucketCount": { "Ref": "s3BucketCount" }
        },
        "Tags": [{ "Key": "Name", "Value": "s3Stack" }]
      }
    },
    "vpcStack": {
      "Type": "AWS::CloudFormation::Stack",
      "Properties": {
        "TemplateURL": { "Fn::Join": ["", [{ "Ref": "templateBucketURL"}, "vpc.json"]]},
        "TimeoutInMinutes" : 5,
        "Parameters": {
          "vpcCIDR": { "Ref": "vpcCIDR" }
        },
        "Tags": [{ "Key": "Name", "Value": "vpcStack" }]
      }
    },
    "securityGroupStack": {
      "Type": "AWS::CloudFormation::Stack",
      "Properties": {
        "TemplateURL": { "Fn::Join": ["", [{ "Ref": "templateBucketURL"}, "security-group.json"]]},
        "TimeoutInMinutes" : 5,
        "Parameters": {
          "allowedCIDR": { "Ref": "allowedCIDR" },
          "vpcId" : { "Fn::GetAtt": ["vpcStack", "Outputs.vpcId"] }
        },
        "Tags": [{ "Key": "Name", "Value": "securityGroupStack" }]
      }
    },
    "ec2SpotFleetStack": {
      "Type": "AWS::CloudFormation::Stack",
      "Properties": {
        "TemplateURL": { "Fn::Join": ["", [{ "Ref": "templateBucketURL"}, "ec2-spot-fleet.json"]]},
        "TimeoutInMinutes" : 10,
        "Parameters": {
          "spotFleetKeyPairName": { "Ref": "spotFleetKeyPairName" },
          "spotFleetUserData": { "Ref": "spotFleetUserData" },
          "spotFleetTargetCapacity": { "Ref": "spotFleetTargetCapacity" },
          "spotFleetMaximumCapacity": { "Ref": "spotFleetMaximumCapacity" },
          "spotFleetPrice": { "Ref": "spotFleetPrice" },
          "spotFleetAllocationStrategy": { "Ref": "spotFleetAllocationStrategy" },
          "spotFleetRequestType": { "Ref": "spotFleetRequestType" },
          "spotFleetInstanceType": { "Ref": "spotFleetInstanceType" },
          "spotFleetS3BucketName": { "Ref": "spotFleetS3BucketName" },
          "spotFleetSubnets": {
            "Fn::Join": [
              ",",
              [{"Fn::GetAtt": ["vpcStack", "Outputs.privateSubnet1"]}, {"Fn::GetAtt": ["vpcStack", "Outputs.privateSubnet2"]}]
            ]
          },
          "spotFleetSecurityGroup": { "Fn::GetAtt": ["securityGroupStack", "Outputs.securityGroupId"] }
        },
        "Tags": [{ "Key": "Name", "Value": "ec2SpotFleetStack" }]
      }
    }
  }
}