Ubuntu 16.04
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OpenStack Queens : How to use Heat
2018/03/15
 
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 |
+--------------------------------------+------------+--------+
| 217a694d-e526-4921-a018-6b1e6874ef44 | Ubuntu1604 | active |
+--------------------------------------+------------+--------+

root@dlp ~(keystone)#
openstack network list

+--------------------------------------+---------+--------------------------------------+
| ID                                   | Name    | Subnets                              |
+--------------------------------------+---------+--------------------------------------+
| 13a8c6d1-bb29-4aa1-b698-31630852cb87 | ext_net | 655fa742-2e84-4539-8d15-c008f1e4331e |
| 40e03738-cd4b-49b4-9e64-fabcaac64dd5 | int_net | 9fdf51fe-31a9-4f89-8e33-6e3c00a37002 |
+--------------------------------------+---------+--------------------------------------+

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                  | 60464a2b-1a9b-41fe-9543-ebab2e89782c |
| stack_name          | Sample-Stack                         |
| description         | Heat Sample Template                 |
| creation_time       | 2018-03-15T14:26:37Z                 |
| 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 |
+-----------+--------------+--------------+-----------------+----------------------+--------------+
| 60464a... | Sample-Stack | 1ab4e37f2... | CREATE_COMPLETE | 2018-03-15T14:26:37Z | None         |
+-----------+--------------+--------------+-----------------+----------------------+--------------+

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

root@dlp ~(keystone)#
openstack server list

+-----------+----------------------+--------+-----------------------+------------+----------+
| ID        | Name                 | Status | Networks              | Image      | Flavor   |
+-----------+----------------------+--------+-----------------------+------------+----------+
| 2c4c9d52- | Heat_Deployed_Server | ACTIVE | int_net=192.168.100.5 | 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


[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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