Scrubbed version of RStudio CloudFormation template as referenced at http://blog.severski.net/2015/11/creating-rstudio-server-instance-on-aws.html

rstudio-cloudformation.json

{
  "AWSTemplateFormatVersion" : "2010-09-09",
  "Description" : "Spin up a RStudio Server instance with a HTTPS off-loading ELB.",
  "Parameters" : {
    "SSLcertificate" : {
      "Type" : "String",
      "Default" : "arn:aws:iam::ACCOUNT)NUMBER:server-certificate/rstudio-cert",
      "Description" : "Enter the ARN of the server certificate for ELB front-end. Default is rstudio-cert."
    },
    "MaxSpotPrice" : {
      "Type" : "Number",
      "Default" : "0.10",
      "Description" : "Enter maximum spot price."
    },
    "KeyName" : {
      "Description" : "The EC2 Key Pair to allow SSH access to the instances.",
      "Default" : "keypair_name",
      "Type" : "AWS::EC2::KeyPair::KeyName",
      "ConstraintDescription" : "Must be the name of an existing EC2 KeyPair."
    },
    "RStudioAMI" : {
      "Type" : "String",
      "Default" : "ami-1",
      "Description" : "Enter the AMI image ID of the RStudio Server image."
    }
  },
  "Resources" : {
    "InstanceConfig" : {
      "Type" : "AWS::AutoScaling::LaunchConfiguration",
      "Properties" : {
        "AssociatePublicIpAddress" : "true",
        "ImageId" : {"Ref" : "RStudioAMI" },
        "SecurityGroups" : [ "sg-1" ],
        "KeyName": {"Ref" : "KeyName" },
        "InstanceType" : "m4.2xlarge",
        "SpotPrice" : { "Ref" : "MaxSpotPrice" },
        "BlockDeviceMappings" : [ {
          "DeviceName" : "/dev/sda1",
          "Ebs" : {
            "VolumeSize" : "40",
            "VolumeType" : "gp2"
          }
        } ]
      }
    },
    "MyServerGroup" : {
      "Type" : "AWS::AutoScaling::AutoScalingGroup",
      "Properties" : {
        "VPCZoneIdentifier" : [ "subnet-1", "subnet-2" ],
        "LaunchConfigurationName" : { "Ref" : "InstanceConfig" },
        "MinSize" : "1",
        "MaxSize" : "1",
        "LoadBalancerNames" : [ { "Ref" : "myELB" } ],
        "Tags" : [
        {
          "Key" : "Name",
          "Value" : "rstudio-server",
          "PropagateAtLaunch" : "true"
        },
        {
          "Key" : "Project",
          "Value" : "rusers",
          "PropagateAtLaunch" : "true"
        }
        ]
      }
    },
    "myELB" : {
      "Type" : "AWS::ElasticLoadBalancing::LoadBalancer",
      "Properties" : {
        "SecurityGroups" : [ "sg-1", "sg-2" ],
        "Scheme" : "internet-facing",
        "Subnets": [ "subnet-1", "subnet-2" ],
        "Listeners" : [ {
          "LoadBalancerPort" : "443",
          "InstancePort" : "8080",
          "Protocol" : "HTTPS",
          "InstanceProtocol" : "HTTP",
          "SSLCertificateId" : { "Ref" : "SSLcertificate" }
        } ],
        "Tags" : [
        {
          "Key" : "Name",
          "Value" : "rstudio-server"
        },
        {
          "Key" : "Project",
          "Value" : "rusers"
        }
        ]
      }
    },
    "myDNS" : {
      "Type" : "AWS::Route53::RecordSetGroup",
      "Properties" : {
        "HostedZoneName" : "example.tld.",
        "Comment" : "Zone alias targeted to myELB LoadBalancer.",
        "RecordSets" : [
        {
          "Name" : "rstudio.example.tld.",
          "Type" : "A",
          "AliasTarget" : {
            "HostedZoneId" : { "Fn::GetAtt" : ["myELB", "CanonicalHostedZoneNameID"] },
            "DNSName" : { "Fn::GetAtt" : ["myELB","CanonicalHostedZoneName"] }
          }
        }
        ]
      }
    }
  },
  "Outputs" : {
    "URL" : {
      "Description" : "The URL to access RStudio",
      "Value" :  { "Fn::Join" : [ "", [ "https://", { "Fn::GetAtt" : [ "myELB", "DNSName" ]}]]}
    }
  }
}