OpenStack Orchestration (Heat)
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Launch an instance

In environments that include the Orchestration service, you can create a stack that launches an instance.

Create a template

The Orchestration service uses templates to describe stacks. To learn about the template language, see the Template Guide in the Heat developer documentation.

  • Create the demo-template.yml file with the following content:

    heat_template_version: 2015-10-15
    description: Launch a basic instance with CirrOS image using the
                 ``m1.tiny`` flavor, ``mykey`` key,  and one network.
    
    parameters:
      NetID:
        type: string
        description: Network ID to use for the instance.
    
    resources:
      server:
        type: OS::Nova::Server
        properties:
          image: cirros
          flavor: m1.tiny
          key_name: mykey
          networks:
          - network: { get_param: NetID }
    
    outputs:
      instance_name:
        description: Name of the instance.
        value: { get_attr: [ server, name ] }
      instance_ip:
        description: IP address of the instance.
        value: { get_attr: [ server, first_address ] }

Create a stack

Create a stack using the demo-template.yml template.

  1. Source the demo credentials to perform the following steps as a non-administrative project:

    $ . demo-openrc
  2. Determine available networks.

    $ openstack network list
    +--------------------------------------+-------------+--------------------------------------+
    | ID                                   | Name        | Subnets                              |
    +--------------------------------------+-------------+--------------------------------------+
    | 4716ddfe-6e60-40e7-b2a8-42e57bf3c31c | selfservice | 2112d5eb-f9d6-45fd-906e-7cabd38b7c7c |
    | b5b6993c-ddf9-40e7-91d0-86806a42edb8 | provider    | 310911f6-acf0-4a47-824e-3032916582ff |
    +--------------------------------------+-------------+--------------------------------------+

    Note

    This output may differ from your environment.

  3. Set the NET_ID environment variable to reflect the ID of a network. For example, using the provider network:

    $ export NET_ID=$(openstack network list | awk '/ provider / { print $2 }')
  4. Create a stack of one CirrOS instance on the provider network:

    $ openstack stack create -t demo-template.yml --parameter "NetID=$NET_ID" stack
    +--------------------------------------+------------+--------------------+---------------------+--------------+
    | ID                                   | Stack Name | Stack Status       | Creation Time       | Updated Time |
    +--------------------------------------+------------+--------------------+---------------------+--------------+
    | dbf46d1b-0b97-4d45-a0b3-9662a1eb6cf3 | stack      | CREATE_IN_PROGRESS | 2015-10-13T15:27:20 | None         |
    +--------------------------------------+------------+--------------------+---------------------+--------------+
  5. After a short time, verify successful creation of the stack:

    $ openstack stack list
    +--------------------------------------+------------+-----------------+---------------------+--------------+
    | ID                                   | Stack Name | Stack Status    | Creation Time       | Updated Time |
    +--------------------------------------+------------+-----------------+---------------------+--------------+
    | dbf46d1b-0b97-4d45-a0b3-9662a1eb6cf3 | stack      | CREATE_COMPLETE | 2015-10-13T15:27:20 | None         |
    +--------------------------------------+------------+-----------------+---------------------+--------------+
  6. Show the name and IP address of the instance and compare with the output of the OpenStack client:

    $ openstack stack output show --all stack
    [
      {
        "output_value": "stack-server-3nzfyfofu6d4",
        "description": "Name of the instance.",
        "output_key": "instance_name"
      },
      {
        "output_value": "10.4.31.106",
        "description": "IP address of the instance.",
        "output_key": "instance_ip"
      }
    ]
    $ openstack server list
    +--------------------------------------+---------------------------+--------+---------------------------------+
    | ID                                   | Name                      | Status | Networks                        |
    +--------------------------------------+---------------------------+--------+---------------------------------+
    | 0fc2af0c-ae79-4d22-8f36-9e860c257da5 | stack-server-3nzfyfofu6d4 | ACTIVE | public=10.4.31.106              |
    +--------------------------------------+---------------------------+--------+---------------------------------+
  7. Delete the stack.

    $ openstack stack delete --yes stack