Ubuntu 16.04
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OpenStack Pike : How to use Heat
2017/09/18
 
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: 2017-09-01

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 |
+--------------------------------------+------------+--------+
| 1f46b995-47e3-4858-b0b0-9221867462cc | Ubuntu1604 | active |
+--------------------------------------+------------+--------+

root@dlp ~(keystone)#
openstack network list

+--------------------------------------+---------+--------------------------------------+
| ID                                   | Name    | Subnets                              |
+--------------------------------------+---------+--------------------------------------+
| 5adc2598-4ebe-4110-b6bf-47d9e2b5c48e | ext_net | 6572863d-f10a-456e-932c-2581d39a3349 |
| fcfcf86c-40a6-4c79-9431-feb74dc5a6bc | int_net | 65e69dd1-0b8c-43d7-9c44-b8099a2e0f82 |
+--------------------------------------+---------+--------------------------------------+

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=Ubuntu1604;NetID=$Int_Net_ID" Sample-Stack

+---------------------+--------------------------------------+
| Field               | Value                                |
+---------------------+--------------------------------------+
| id                  | f704dddd-7f9e-498f-a4fc-99997f350faa |
| stack_name          | Sample-Stack                         |
| description         | Heat Sample Template                 |
| creation_time       | 2017-09-20T04:09:59Z                 |
| 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 |
+-----------+--------------+----------------+-----------------+----------------------+--------------+
| f704dddd- | Sample-Stack | 1ca37b956ae... | CREATE_COMPLETE | 2017-09-20T04:09:59Z | None         |
+-----------+--------------+----------------+-----------------+----------------------+--------------+

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

root@dlp ~(keystone)#
openstack server list

+-----------+----------------------+---------+------------------------------------+------------+----------+
| ID        | Name                 | Status  | Networks                           | Image      | Flavor   |
+-----------+----------------------+---------+------------------------------------+------------+----------+
| 99c7a965- | Heat_Deployed_Server | ACTIVE  | int_net=192.168.100.6              | Ubuntu1604 | m1.small |
| f5ae3046- | Ubuntu_1604          | SHUTOFF | int_net=192.168.100.10, 10.0.0.210 | Ubuntu1604 | 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

+----+------------+--------------+---------------+
| id | stack_name | stack_status | creation_time |
+----+------------+--------------+---------------+
+----+------------+--------------+---------------+
[2]
The guide for writing templates are opened on the official site below.
⇒ http://docs.openstack.org/developer/heat/template_guide/index.html
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