heat.engine.update module¶

class heat.engine.update.StackUpdate(existing_stack, new_stack, previous_stack, rollback=False)[source]¶

Bases: object

A Task to perform the update of an existing stack to a new template.

dependencies()[source]¶

Return the Dependencies graph for the update.

Returns a Dependencies object representing the dependencies between update operations to move from an existing stack definition to a new one.

preview()[source]¶