heat.engine.resources.template_resource module

class heat.engine.resources.template_resource.TemplateResource(name, definition, stack)

Bases: StackResource

A resource implemented by a nested stack.

This implementation passes resource properties as parameters to the nested stack. Outputs of the nested stack are exposed as attributes of this resource.

child_params()

Override method of child_params for the resource.

Returns:

parameter values for our nested stack based on our properties

child_template()

Default implementation to get the child template.

Resources that inherit from StackResource should override this method with specific details about the template used by them.

get_attribute(key, *path)

Default implementation for function get_attr and Fn::GetAtt.

This may be overridden by resource plugins to add extra logic specific to the resource implementation.

get_reference_id()

Default implementation for function get_resource.

This may be overridden by resource plugins to add extra logic specific to the resource implementation.

static get_schemas(tmpl, param_defaults)

static get_template_file(template_name, allowed_schemes)

handle_adopt(resource_data=None)

handle_create()

handle_update(json_snippet, tmpl_diff, prop_diff)

metadata_update(new_metadata=None)

Refresh the metadata if new_metadata is None.

regenerate_info_schema(definition)

Default implementation; should be overridden by resources.

Should be overridden by resources that would require schema refresh during update, ex. TemplateResource.

Definition:

Resource Definition

template_data()

property template_url

Template url for the stack resource.

When stack resource is a TemplateResource, it’s the template location. For group resources like ResourceGroup where the template is constructed dynamically, it’s just a placeholder.

validate()

Validate the resource.

This may be overridden by resource plugins to add extra validation logic specific to the resource implementation.

validate_template()

Validate structural/syntax aspects of the resource definition.

Resource plugins should not override this, because this interface is expected to be called pre-create so things normally valid in an overridden validate() such as accessing properties may not work.

heat.engine.resources.template_resource.generate_class_from_template(name, data, param_defaults)