Ubuntu 18.04
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OpenStack Rocky : How to use Heat2018/09/18

 
How to use the OpenStack Orchestration Service (Heat).
This example is based on the emvironment like follows.
------------+---------------------------+---------------------------+------------
            |                           |                           |
        eth0|10.0.0.30              eth0|10.0.0.50              eth0|10.0.0.51
+-----------+-----------+   +-----------+-----------+   +-----------+-----------+
|    [ Control Node ]   |   |    [ Network Node ]   |   |    [ Compute Node ]   |
|                       |   |                       |   |                       |
|  MariaDB    RabbitMQ  |   |        L2 Agent       |   |        Libvirt        |
|  Memcached  httpd     |   |        L3 Agent       |   |     Nova Compute      |
|  Keystone   Glance    |   |     Metadata Agent    |   |        L2 Agent       |
|  Nova API             |   |     Cinder Volume     |   |                       |
|  Neutron Server       |   |       Heat API        |   |                       |
|  Metadata Agent       |   |      Heat Engine      |   |                       |
|  Cinder API           |   |                       |   |                       |
+-----------------------+   +-----------------------+   +-----------------------+

[1] Deploy Instances with Heat services and templates. The example below is on the Controle Node.
# create a template for test

root@dlp ~(keystone)#
vi sample-stack.yml
heat_template_version: 2018-08-31

description: Heat Sample Template

parameters:
  ImageID:
    type: string
    description: Image used to boot a server
  NetID:
    type: string
    description: Network ID for the server

resources:
  server1:
    type: OS::Nova::Server
    properties:
      name: "Heat_Deployed_Server"
      image: { get_param: ImageID }
      flavor: "m1.small"
      networks:
      - network: { get_param: NetID }

outputs:
  server1_private_ip:
    description: IP address of the server in the private network
    value: { get_attr: [ server1, first_address ] }

root@dlp ~(keystone)#
openstack image list

+--------------------------------------+------------+--------+
| ID                                   | Name       | Status |
+--------------------------------------+------------+--------+
| 7df9e97e-96aa-45f9-8ffb-fa8685283a70 | Ubuntu1804 | active |
+--------------------------------------+------------+--------+

root@dlp ~(keystone)#
openstack network list

+--------------------------------------+---------+--------------------------------------+
| ID                                   | Name    | Subnets                              |
+--------------------------------------+---------+--------------------------------------+
| 59845493-39f0-44ac-af69-4db727beaeaf | int_net | ee13f5fc-fc2c-4853-beb7-6cb911c69cb4 |
| a52a1645-55fb-4600-b42e-67bbdedae320 | ext_net | b81200dc-c6fb-491f-80b6-9176d5b4e48a |
+--------------------------------------+---------+--------------------------------------+

root@dlp ~(keystone)#
Int_Net_ID=$(openstack network list | grep int_net | awk '{ print $2 }')
# create an instance from the template

root@dlp ~(keystone)#
openstack stack create -t sample-stack.yml --parameter "ImageID=Ubuntu1804;NetID=$Int_Net_ID" Sample-Stack

+---------------------+--------------------------------------+
| Field               | Value                                |
+---------------------+--------------------------------------+
| id                  | d1e7ecd7-51ac-4c38-8bac-1aad34e1d614 |
| stack_name          | Sample-Stack                         |
| description         | Heat Sample Template                 |
| creation_time       | 2018-09-18T03:58:59Z                 |
| updated_time        | None                                 |
| stack_status        | CREATE_IN_PROGRESS                   |
| stack_status_reason | Stack CREATE started                 |
+---------------------+--------------------------------------+

# turn to [CREATE_COMPLETE] after few minutes later like follows

root@dlp ~(keystone)#
openstack stack list

+--------------------------------------+--------------+----------------------------------+-----------------+----------------------+--------------+
| ID                                   | Stack Name   | Project                          | Stack Status    | Creation Time        | Updated Time |
+--------------------------------------+--------------+----------------------------------+-----------------+----------------------+--------------+
| d1e7ecd7-51ac-4c38-8bac-1aad34e1d614 | Sample-Stack | a4307ece2969492eb795f64da4006b2d | CREATE_COMPLETE | 2018-09-18T03:58:59Z | None         |
+--------------------------------------+--------------+----------------------------------+-----------------+----------------------+--------------+

# the instance is running which is created from the Heat template

root@dlp ~(keystone)#
openstack server list

+--------------------------------------+----------------------+--------+------------------------+------------+----------+
| ID                                   | Name                 | Status | Networks               | Image      | Flavor   |
+--------------------------------------+----------------------+--------+------------------------+------------+----------+
| 6634e606-9bd8-4da8-9441-47941419c43d | Heat_Deployed_Server | ACTIVE | int_net=192.168.100.13 | Ubuntu1804 | m1.small |
+--------------------------------------+----------------------+--------+------------------------+------------+----------+

# delete the instance likwe follows if you don't need

root@dlp ~(keystone)#
openstack stack delete --yes Sample-Stack

root@dlp ~(keystone)#
openstack stack list


[2]
The guide for writing templates are opened on the official site below.
⇒ https://docs.openstack.org/heat/latest/template_guide/index.html
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