OpenStack Rocky : How to use Heat2018/09/04 |
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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 | | Open vSwitch | | Libvirt |
| Memcached httpd | | L2 Agent | | Nova Compute |
| Keystone Glance | | L3 Agent | | Open vSwitch |
| Nova API | | Metadata Agent | | L2 Agent |
| Neutron Server | | Cinder Volume | | |
| Metadata Agent | | Heat API API-CFN | | |
| Cinder API | | Heat Engine | | |
+-----------------------+ +-----------------------+ +-----------------------+
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| [1] | Deploy Instances with Heat services and templates. The example below is on the Controle Node. |
heat_template_version: 2018-08-31
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 | +--------------------------------------+---------+--------+ | 05269b20-9625-46b6-8377-3893c70906bd | CentOS7 | active | +--------------------------------------+---------+--------+[root@dlp ~(keystone)]# openstack network list +--------------------------------------+---------+--------------------------------------+ | ID | Name | Subnets | +--------------------------------------+---------+--------------------------------------+ | 2f05bc33-a661-4882-b6f3-857d14f37165 | int_net | d6c87a6c-b773-473c-8371-4220594eff2c | | b2873d6d-3081-49f2-a893-0fa135962c9c | ext_net | 7dd8e915-6885-4ecb-8157-41e6de0b6498 | +--------------------------------------+---------+--------------------------------------+[root@dlp ~(keystone)]# Int_Net_ID=$(openstack network list | grep int_net | awk '{ print $2 }')
# create an instance from the template [root@dlp ~(keystone)]# openstack stack create -t sample-stack.yml --parameter "ImageID=CentOS7;NetID=$Int_Net_ID" Sample-Stack +---------------------+--------------------------------------+ | Field | Value | +---------------------+--------------------------------------+ | id | 5b5cecec-b258-4392-a557-022f171e4b0f | | stack_name | Sample-Stack | | description | Heat Sample Template | | creation_time | 2018-09-04T04:16:19Z | | 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 | +--------------------------------------+--------------+----------------------------------+-----------------+----------------------+--------------+ | 5b5cecec-b258-4392-a557-022f171e4b0f | Sample-Stack | 2cb4b9d73bcc46449f711794506c3faf | CREATE_COMPLETE | 2018-09-04T04:16:19Z | None | +--------------------------------------+--------------+----------------------------------+-----------------+----------------------+--------------+ # the instance is running which is created from the Heat template [root@dlp ~(keystone)]# openstack server list +--------------------------------------+----------------------+--------+-----------------------+---------+----------+ | ID | Name | Status | Networks | Image | Flavor | +--------------------------------------+----------------------+--------+-----------------------+---------+----------+ | 0e04e4c6-ed4d-480d-b14f-0a506c27412c | Heat_Deployed_Server | ACTIVE | int_net=192.168.100.4 | CentOS7 | m1.small | +--------------------------------------+----------------------+--------+-----------------------+---------+----------+ # delete the instance likwe follows if you don't need [root@dlp ~(keystone)]# openstack stack delete --yes Sample-Stack
[root@dlp ~(keystone)]#
[root@dlp ~(keystone)]# openstack stack list openstack server 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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