Ubuntu 18.04
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OpenStack Queens : How to use Heat
2018/06/20
 
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: 2018-03-02

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 |
+--------------------------------------+------------+--------+
| bb285a87-fe42-449a-a659-b5a304177b18 | Ubuntu1804 | active |
+--------------------------------------+------------+--------+

root@dlp ~(keystone)#
openstack network list

+--------------------------------------+---------+--------------------------------------+
| ID                                   | Name    | Subnets                              |
+--------------------------------------+---------+--------------------------------------+
| 04a14e8b-5ad8-4db7-b89c-cef830b487af | int_net | cccfe09e-6ed6-4a11-8aa5-5e56abe4e181 |
| 38f24fdf-b038-4e50-8923-a3e05f8683d0 | ext_net | ad133394-8c9f-4cd0-9db8-638f78e6f29b |
+--------------------------------------+---------+--------------------------------------+

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                  | 7d70ce1b-f90f-4032-858e-b93b78a2a4bc |
| stack_name          | Sample-Stack                         |
| description         | Heat Sample Template                 |
| creation_time       | 2018-06-20T00:55:13Z                 |
| 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 |
+--------------+--------------+----------------------------------+-----------------+----------------------+--------------+
| 7d70ce1b-... | Sample-Stack | 12d80218a35e4c62aa0403e92b5b649a | CREATE_COMPLETE | 2018-06-20T00:55:13Z | None         |
+--------------+--------------+----------------------------------+-----------------+----------------------+--------------+

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

root@dlp ~(keystone)#
openstack server list

+--------------+----------------------+--------+------------------------+------------+----------+
| ID           | Name                 | Status | Networks               | Image      | Flavor   |
+--------------+----------------------+--------+------------------------+------------+----------+
| 0357a885-... | 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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