How to launch an instance on DreamCompute using ISO image

Boot an instance from an ISO image

OpenStack supports booting instances using ISO images. But before you make such instances functional, use the nova boot command with the following parameters to boot an instance.

$ nova boot \
    --image ubuntu-14.04.2-server-amd64.iso \
    --block-device source=blank,dest=volume,size=10,shutdown=preserve \
    --nic net-id = NETWORK_UUID \
    --flavor 100 INSTANCE_NAME
+--------------------------------------+--------------------------------------------+
| Property                             | Value                                      |
+--------------------------------------+--------------------------------------------+
| OS-DCF:diskConfig                    | MANUAL                                     |
| OS-EXT-AZ:availability_zone          | nova                                       |
| OS-EXT-SRV-ATTR:host                 | -                                          |
| OS-EXT-SRV-ATTR:hypervisor_hostname  | -                                          |
| OS-EXT-SRV-ATTR:instance_name        | instance-00000004                          |
| OS-EXT-STS:power_state               | 0                                          |
| OS-EXT-STS:task_state                | scheduling                                 |
| OS-EXT-STS:vm_state                  | building                                   |
| OS-SRV-USG:launched_at               | -                                          |
| OS-SRV-USG:terminated_at             | -                                          |
| accessIPv4                           |                                            |
| accessIPv6                           |                                            |
| adminPass                            | ZaiYeC8iucgU                               |
| config_drive                         |                                            |
| created                              | 2015-06-01T16:34:50Z                       |
| flavor                               | gp1.subsonic (100)                         |
| hostId                               |                                            |
| id                                   | 1e1797f3-1662-49ff-ae8c-a77e82ee1571       |
| image                                | ubuntu-14.04.2-server-amd64.iso            |
| key_name                             | -                                          |
| metadata                             | {}                                         |
| name                                 | INSTANCE_NAME                              |
| os-extended-volumes:volumes_attached | []                                         |
| progress                             | 0                                          |
| security_groups                      | default                                    |
| status                               | BUILD                                      |
| tenant_id                            | ccef9e62b1e645df98728fb2b3076f27           |
| updated                              | 2014-05-09T16:34:51Z                       |
| user_id                              | fef060ae7bfd4024b3edb97dff59017a           |
+--------------------------------------+--------------------------------------------+

In this command, ubuntu-14.04.2-server-amd64.iso is the ISO image, and INSTANCE_NAME is the name of the new instance. NETWORK_UUID is a valid network id in your system.

Note

You need the Block Storage service, and the parameter shutdown=preserve is also mandatory, thus the volume will be preserved after the shutdown of the instance.

After the instance is successfully launched, connect to the instance using a remote console and follow the instructions to install the system as using ISO images on regular computers. When the installation is finished and system is rebooted, the instance asks you again to install the operating system, which means your instance is not usable. If you have problems with image creation, please check the Virtual Machine Image Guide for reference.

Make the instances booted from ISO image functional

Now complete the following steps to make your instances created using ISO image actually functional.

  1. Delete the instance using the following command.

    $ nova delete INSTANCE_NAME
    
  2. After you delete the instance, the system you have just installed using your ISO image remains, because the parameter shutdown=preserve was set, so run the following command.

    $ cinder list
    +-----------------+-----------+--------------+------+-------------+----------+-------------+
    |       ID        |   Status  |      Name    | Size | Volume Type | Bootable | Attached to |
    +-----------------+-----------+--------------+------+-------------+----------+-------------+
    | d620d971-b16... | available | 655ef3e4-... |  8   |     None    |  false   |             |
    +-----------------+-----------+--------------+------+-------------+----------+-------------+
    

    You get a list with all the volumes in your system. In this list, you can find the volume that is attached to your ISO created instance, with the false bootable property.

  3. Upload the volume to glance.

    $ cinder upload-to-image VOLUME_UUID IMAGE_NAME
    $ glance image-list
    +-------------------+------------+-------------+------------------+------------+--------+
    | ID                | Name       | Disk Format | Container Format | Size       | Status |
    +-------------------+------------+-------------+------------------+------------+--------+
    | 74303284-f802-... | IMAGE_NAME | iso         | bare             | 764321792  | active |
    +-------------------+------------+-------------+------------------+------------+--------+
    

    The VOLUME_UUID is the uuid of the volume that is attached to your ISO created instance, and the IMAGE_NAME is the name that you give to your new image.

  4. After the image is successfully uploaded, you can use the new image to boot instances.

    The instances launched using this image contain the system that you have just installed using the ISO image.

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