The Orchestration module(heat) uses a heat orchestration template(HOT)to create and manage cloud resources;

The Orchestration module provides a template-based orchestration for description a cloud application,generrate running cloud applications;

the software integrates other core components of OpenStack into a one-file template system;
The template allow you to create most OpenStack resource types,such as instances,floating IPs,volumes,secuurity groups and users.It also provides advanced functionality,such as instance high availability,instance auuto-scaling,and nested stacks,This enables OpenStack core projects to receives a large user base;

The service enables deployers to integrate with the Orchestration module directly or through custom plug-ins;

verity operation of The Orchestration module

The Orchestration module uses templates to description stacks;