sample.json

{
  "AWSTemplateFormatVersion": "2010-09-09",
  "Description": "[Network] Kafka",

  "Resources": {

    "DynamicAMI" : {
      "Type" : "Custom::DynamicAMI",
      "Properties" : {
        "ServiceToken": { "Fn::Join": [ ":", [ "arn:aws:lambda", { "Ref": "AWS::Region" }, { "Ref": "AWS::AccountId" }, "ami-lookup" ]]},
        "NodeName" : "base",
        "Region" : { "Ref" : "AWS::Region" },
        "AccountId" : { "Ref" : "AWS::AccountId" }
      }
    },

    "LaunchConfig" : {
      "Type" : "AWS::AutoScaling::LaunchConfiguration",
      "Properties" : {
        "InstanceType" : "t2.small",
        "ImageId" : { "Fn::GetAtt" : [ "DynamicAMI", "Id" ] } ,
        "UserData" : {
          "Fn::Base64" : { "Fn::Join" : [ "", [
            "#!/bin/bash\n",
            "cfn-init --stack ", { "Ref" : "AWS::StackName" },
            " --resource LaunchConfig",
            " --region ", { "Ref" : "AWS::Region" },
            "\n",
            "cfn-signal --stack ", { "Ref" : "AWS::StackName" },
            " --exit $?",
            " --resource LaunchGroup",
            " --region ", { "Ref" : "AWS::Region" },
            "\n"
          ] ] }
        }
      }
    },

    "LaunchGroup" : {
      "Type" : "AWS::AutoScaling::AutoScalingGroup",
      "CreationPolicy" : {
        "ResourceSignal" : { "Count" : "1", "Timeout" : "PT5M" }
      },
      "Properties" : {
        "LaunchConfigurationName" : { "Ref" : "LaunchConfig" },
        "MinSize" : "1",
        "MaxSize" : "1",
        "Cooldown" : "180",
        "HealthCheckGracePeriod" : "300",
        "HealthCheckType" : "EC2",
        "Tags" : [ { "Key" : "Name", "Value" : { "Ref" : "AWS::StackName" }, "PropagateAtLaunch" : "true" } ]
      }
    }
  }
}