user_data_script Helper

The user_data_script helper is use to load the UserData scripts. The user_data_script reads the file that the @user_data_script variable is set to.

Example

Let’s use an example to explain how it works. Say you have a template with an EC2 instance resource with the UserData property configured:

resource("Instance", "AWS::EC2::Instance",
  InstanceType: ref("InstanceType"),
  UserData: base64(sub(user_data_script)),
)

In the variables file, set the @user_data_script variable to the path of the script.

configs/demo/variables/development.rb:

@user_data_script = "configs/demo/user_data/bootstrap.sh"

Make sure that the script exists. Example:

configs/demo/user_data/bootstrap.sh

#!/bin/bash
/opt/aws/bin/cfn-init -v --stack ${AWS::StackName} --resource Instance --region ${AWS::Region}
uptime