cf-template.json

{
  "Description" : "Test of Elastic IP association",

  "AWSTemplateFormatVersion" : "2010-09-09",

  "Parameters" : {

    "InstanceType" : {
      "Description" : "EC2 instance type for backup server",
      "Type" : "String",
      "Default" : "t2.micro"
    },

    "KeyName" : {
      "Description" : "Key pair name",
      "Type" : "String"
    }

  },

  "Mappings" : {

    "AWSInstanceType2Arch" : {
      "t1.micro": { "Arch" : "64" }
    },

    "AWSRegionArch2AMI": {
      "eu-west-1": {
        "32" : "NOT_YET_SUPPORTED",
        "64" : "ami-76817c1e",
        "64HVM" : "NOT_YET_SUPPORTED"
      }
    }
  },

  "Resources" : {
    "LaunchConfiguration" : {
      "Type": "AWS::AutoScaling::LaunchConfiguration",

      "Properties": {
        "ImageId" : {
          "Fn::FindInMap" : [
            "AWSRegionArch2AMI",
            { "Ref" : "AWS::Region" },
            { "Fn::FindInMap" : [ "AWSInstanceType2Arch", { "Ref" : "InstanceType" }, "Arch" ] }
          ]
        },
        "AssociatePublicIpAddress" : true,
        "InstanceType"   : { "Ref" : "InstanceType" },
        "SecurityGroups" : [ { "Ref" : "SecurityGroup" } ],
        "KeyName"        : { "Ref" : "KeyName" },
        "UserData"       : { "Fn::Base64" : { "Fn::Join" : ["", [
          "#!/bin/bash -v\n",

          "# Install cfn bootstraping tools\n",
          "apt-get update\n",
          "apt-get -y install python-setuptools python-pip\n",
          "easy_install https://s3.amazonaws.com/cloudformation-examples/aws-cfn-bootstrap-latest.tar.gz\n",

          "# Make sure we have the latest aws-ec2-assign-elastic-ip\n",
          "pip install aws-ec2-assign-elastic-ip==0.1.0b1 || error_exit 'Failed upgrading aws-ec2-assign-elastic-ip to the latest version'\n",

          "# Assign an Elastic IP\n",
          "aws-ec2-assign-elastic-ip",
          "    --access-key ", { "Ref" : "AccessKeys" },
          "    --secret-key ", { "Fn::GetAtt": ["AccessKeys", "SecretAccessKey"] },
          "    --region ", { "Ref" : "AWS::Region" },
          " >> /var/log/aws-ec2-assign-elastic-ip.log\n"
        ]]}}
      }
    },

    "AutoScalingGroup": {
      "Type": "AWS::AutoScaling::AutoScalingGroup",
      "Properties": {
        "LaunchConfigurationName": { "Ref": "LaunchConfiguration" },
        "MinSize": "1",
        "MaxSize": "1",
        "Tags" : [
          {
            "Key" : "Name",
            "Value" : { "Ref" : "AWS::StackName" },
            "PropagateAtLaunch" : true
          }
        ]
      }
    },

    "User" : {
      "Type" : "AWS::IAM::User",
      "Properties" : {
        "Path": "/",
        "Policies": [
          {
            "PolicyName": "cloudformation",
            "PolicyDocument": { "Statement":[{
              "Effect":"Allow",
              "Action":[
                "cloudformation:DescribeStackResource",
                "ec2:*"
              ],
              "Resource":"*"
            }]}
          }
        ]
      }
    },

    "AccessKeys" : {
      "Type" : "AWS::IAM::AccessKey",
      "Properties" : {
        "UserName" : {"Ref": "User"}
      }
    },

    "EIP1" : { "Type" : "AWS::EC2::EIP" },
    "EIP2" : { "Type" : "AWS::EC2::EIP" },
    "EIP3" : { "Type" : "AWS::EC2::EIP" },

    "SecurityGroup" : {
      "Type": "AWS::EC2::SecurityGroup",
      "Properties" : {
        "GroupDescription": "Security group",
        "SecurityGroupIngress": [
          { "IpProtocol": "tcp", "FromPort": "22", "ToPort": "22", "CidrIp": "0.0.0.0/0" }
        ],
        "Tags" : [
          { "Key": "Name",    "Value" : { "Ref" : "AWS::StackName" } }
        ]
      }
    }
  }
}