CentOS 6
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OpenStack Icehouse : How to use Heat
2015/02/02
 
How to use the OpenStack Orchestration Service (Heat).
This example is based on the environment like follows.
                                |
+------------------+            |            +------------------------+
| [ Control Node ] |            |            |    [ Network Node ]    |
|     Keystone     |10.0.0.30   |   10.0.0.50|    DHCP,L3,L2 Agent    |
|      Glance      |------------+------------|     Metadata Agent     |
|     Nova API     |eth0        |        eth0|    Heat API,API-CFN    |
|  Neutron Server  |            |            |       Heat Engine      |
+------------------+            |            +------------------------+
                            eth0|10.0.0.51
                      +--------------------+
                      |  [ Compute Node ]  |
                      |    Nova Compute    |
                      |      L2 Agent      |
                      +--------------------+

[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: 2013-05-23

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)]#
glance image-list

+--------------------------------------+---------+-------------+------------------+------------+--------+
| ID                                   | Name    | Disk Format | Container Format | Size       | Status |
+--------------------------------------+---------+-------------+------------------+------------+--------+
| 8862e58a-ccb9-4251-a70e-03524cedf83c | CentOS6 | qcow2       | bare             | 1104478208 | active |
+--------------------------------------+---------+-------------+------------------+------------+--------+

[root@dlp ~(keystone)]#
Int_Net_ID=`neutron net-list | grep int_net | awk '{ print $2 }'`
# create an instance from the template

[root@dlp ~(keystone)]#
heat stack-create -f sample-stack.yml -P "ImageID=CentOS6;NetID=$Int_Net_ID" Sample-Stack

+--------------------------------------+--------------+--------------------+----------------------+
| id                                   | stack_name   | stack_status       | creation_time        |
+--------------------------------------+--------------+--------------------+----------------------+
| 29875283-f0b7-46ea-a860-8ea889b9135b | Sample-Stack | CREATE_IN_PROGRESS | 2015-02-03T14:05:52Z |
+--------------------------------------+--------------+--------------------+----------------------+

# turn to "CREATE_COMPLETE" after few minutes later like follows

[root@dlp ~(keystone)]#
heat stack-list

+--------------------------------------+--------------+-----------------+----------------------+
| id                                   | stack_name   | stack_status    | creation_time        |
+--------------------------------------+--------------+-----------------+----------------------+
| 29875283-f0b7-46ea-a860-8ea889b9135b | Sample-Stack | CREATE_COMPLETE | 2015-02-03T14:05:52Z |
+--------------------------------------+--------------+-----------------+----------------------+

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

[root@dlp ~(keystone)]#
nova list

+----------------+----------------------+--------+------------+-------------+-----------------------+
| ID             | Name                 | Status | Task State | Power State | Networks              |
+----------------+----------------------+--------+------------+-------------+-----------------------+
| 88c571ed-d5d3- | Heat_Deployed_Server | ACTIVE | -          | Running     | int_net=192.168.100.4 |
+----------------+----------------------+--------+------------+-------------+-----------------------+

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

[root@dlp ~(keystone)]#
heat stack-delete Sample-Stack

+--------------------------------------+--------------+--------------------+----------------------+
| id                                   | stack_name   | stack_status       | creation_time        |
+--------------------------------------+--------------+--------------------+----------------------+
| 29875283-f0b7-46ea-a860-8ea889b9135b | Sample-Stack | DELETE_IN_PROGRESS | 2015-02-03T14:05:52Z |
+--------------------------------------+--------------+--------------------+----------------------+

[root@dlp ~(keystone)]#
heat 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
Furthermore, some templates are provided like follows.
# install templates

[root@network ~]#
yum --enablerepo=openstack-icehouse,epel -y install openstack-heat-templates
# there are templates under the directory below

[root@network ~]#
ll /usr/share/openstack-heat-templates

total 20
drwxr-xr-x 6 root root 4096 Feb  4 20:07 cfn
drwxr-xr-x 5 root root 4096 Feb  4 20:07 hot
drwxr-xr-x 2 root root 4096 Feb  4 20:07 jeos
drwxr-xr-x 4 root root 4096 Feb  4 20:07 openshift-enterprise
drwxr-xr-x 4 root root 4096 Feb  4 20:07 openshift-origin
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