Stack allows you deploying multipli instance at the same time.
In this article, we will create a simple stack.
Firstly, you need to create a template file with .yaml extension and add the following lines into it.
# vim stack.yaml heat_template_version: 2016-04-08 description: Simple template to deploy a single compute instance parameters: key_name: type: string label: Key Name # default: cloudkey description: Name of key-pair to be used for compute instance image_id: type: string label: Image ID # default: Ubuntu 16.04 Xenial constraints: - allowed_values: [CentOS Linux release 6.6 (Final) , CentOS Linux release 7.0.1406 (Core), Debian Jessie 8.2, Debian Wheezy 7.8 , Ubuntu 16.04 Xenial , Ubuntu Trusty ] description: Image to be used for compute instance instance_type: type: string label: Instance Type constraints: - allowed_values: [ General S , Compute S , General M , Compute M , General L , Extreme S , Compute L , Extreme M , General XL, Compute XL, Extreme L, General XXL, Extreme XL, Compute XXL, Extreme XXL ] description: Type of instance (flavor) to be used resources: Test_Instance1: type: OS::Nova::Server properties: key_name: { get_param: key_name } image: { get_param: image_id } flavor: { get_param: instance_type} Test_Instance2: type: OS::Nova::Server properties: key_name: { get_param: key_name } image: { get_param: image_id } flavor: { get_param: instance_type}
You will follow these steps for create a stack:
Orchestration → Stack → Launch Stack
Choose the File option from the Template Source for uploading stack.yaml file and click the Next button.
On the Launch Stack pop-up page :
Stack Name: please enter stack name
password for user : please enter your account name
Image ID: please choose image for your instances
Instance Type : please choose flavor type for your instances
Key Name : please enter your private key
after these operations, click the Launch button.
After creating stack, you will see your Test_Stack on the Stacks section.
Also, you will see your instances that creating by stacks in the Instances tab.
For further reading about Heat Stack :
Heat Orchestration Template (HOT) Guide
Heat Orchestration Template (HOT) specification