Ubuntu CloudFormation Tools installation snippet. Modified version of http://krunchtime.it/setting-up-bootstrapping-using-cfn-init-for-aws-ubuntu-ec2-instance

ubuntu-cloudformation.json

"UserData": {
  "Fn::Base64": { "Fn::Join":["", [
    "#!/bin/bash -ex\n",
    "apt-get update\n",
    "apt-get -y install python-setuptools\n",
    "mkdir aws-cfn-bootstrap-latest\n",
    "curl https://s3.amazonaws.com/cloudformation-examples/aws-cfn-bootstrap-latest.tar.gz | tar xz -C aws-cfn-bootstrap-latest --strip-components 1\n",
    "easy_install aws-cfn-bootstrap-latest\n",
    "/usr/local/bin/cfn-init --stack ", { "Ref":"AWS::StackName" }, " --resource WebServer", " --region ", { "Ref": "AWS::Region" }, "\n",
    "\n",
    "/usr/local/bin/cfn-signal --exit-code $? '", { "Ref" : "WaitHandle" }, "'\n"
  ]]}
}