Template Structure
The Heat Orchestration Template (HOT) is defined in YAML format.
Below is an outline of the template structure.
heat_template_version: 2013-05-23
description: <description>
parameters:
<parameters>
resources:
<resources>
outputs:
<outputs>| Section | Required | Description |
|---|---|---|
| heat_template_version | Yes |
The HOT version. Specified as 2013-05-23. |
| description | No | Defines a description of the template. |
| parameters | No |
Defines the input parameters. This is used when instantiating the template. |
| resources | No | Defines the resources. |
| outputs | No |
Defines the output parameters. This can be used by users after instantiation of the template has been completed. |
Note: Heat templates use indenting to represent hierarchical structures. However, tab characters cannot be used for these indents.
parameters, resources, and outputs have the following relationships.
| parameters | Defines the input parameters used when using a Heat template. |
| resources | Refers to parameters and can be used in resource creation |
| outputs | Refers to parameters and resources, and can be used as output information |
parameters: Defines the input parameters used when using a Heat template resources: Refers to parameters and can be used in resource creation outputs: Refers to parameters and resources, and can be used as output information