CloudCoreo Compile-time Variables

Note: Be careful when you edit your config.yaml file since this file cannot contain tab characters. When you do line spacing, use spaces instead.

Composite or Compile-time Variables

Composite variables are a great way to enable a variety of user defined options for your Composites as you create Plans to build and audit your infrastructure. These variables are implemented with variable definitions in your Composite code and are exposed in the WebUI via the contents of the <repository-directory>/config.yaml. This file is optional for Composites, but required if you will be defining and exposing variables in your Composite. These variables are evaluated at compile time. Read about Runtime Variables here.

Plan Variables

There are a few fields in the config.yaml file that control the behavior of the WebUI. These are required, description, default, type, and overrides.

• default: You use the default field to pre-populate the default value for your particular variable when a Plan is created and when no other value has been entered. Valid entries for this field are whatever is appropriate for your particular variable. If a value for a particular variable is set via the WebUI, that value will be used instead of the value specified in default.

Example entries for the default: field include:
default: 10.11.0.0
default: us-east-1,eu-west-1,ap-southeast-1
default: notify

• required: You use the required field to indicate whether the WebUI requires this variable to have a value entered when a Plan is created. Valid entries for this field are true or false. Required variables must be supplied in order to Add and Run a Plan. If required variables are not supplied, CloudCoreo will display an error in the WebUI.

Example entries for the required: field include:
required: true
required: false

Example entries for the description: field include:

• description: You use the description field to enter a human readable description that will show as a tooltip in the WebUI for the particular variable when a Plan is created. Valid entries for this field are any plain text (yaml compatible) enclosed in double quotes " ".

description: "This is a sample description"
description: "Enter the value for this variable. Valid values are apple, ball, and/or cat."

• type: You use the type field to define the type of input that this variable accepts. The type will also change how the variable input is displayed in the WebUI. Valid entries for this field include array, string, number, and case.

Example entries for the type: field include:

type: string
type: array

Here is an example config.yaml file showing a few different type: statements :

variables:
  MY_DNS_ZONE:
    default: example.com
    description: This dns zone variable is used for setting up Route53 DNS entries.
    required: true
    type: string

  SWAP_SIZE_IN_GB:
    default: 2
    description: What size swap file would you like to create? (Gigabytes)
    required: false
    type: number

  SERVER_AMI:
    description: Which AMI should the instance be launched from?
    switch: INSTANCE::region
    cases:
      us-east-1: ami-1ecae776
      us-west-1: ami-d114f295
      us-west-2: ami-e7527ed7
    type: array

There is a different type of CloudCoreo Variable that is evaluated at run time. You can read about Runtime Variables here.