OpenStack Queens : How to use Heat2018/06/20 |
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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. |
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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