Create volume from image and boot instance

Use this procedure to create a volume from an image, and use it to boot an instance.

You can create a volume from an existing image, volume, or snapshot.

List available images:

$ nova image-list
+--------------------------------------+---------------------------------+--------+--------+
| ID                                   | Name                            | Status | Server |
+--------------------------------------+---------------------------------+--------+--------+
| e0b7734d-2331-42a3-b19e-067adc0da17d | cirros-0.3.2-x86_64-uec         | ACTIVE |        |
| 75bf193b-237b-435e-8712-896c51484de9 | cirros-0.3.2-x86_64-uec-kernel  | ACTIVE |        |
| 19eee81c-f972-44e1-a952-1dceee148c47 | cirros-0.3.2-x86_64-uec-ramdisk | ACTIVE |        |
+--------------------------------------+---------------------------------+--------+--------+

To create a bootable volume from an image and launch an instance from this volume, use the --block-device parameter.

For example:

$ nova boot --flavor FLAVOR --block-device source=SOURCE,id=ID,dest=DEST,size=SIZE,shutdown=PRESERVE,bootindex=INDEX NAME

The parameters are:

Parameter	Description
`--flavor` `FLAVOR`	The flavor ID or name.
`--block-device` source=`SOURCE`,id=`ID`,dest=`DEST`,size=`SIZE`,shutdown=`PRESERVE`,bootindex=`INDEX`	`SOURCE`: The type of object used to create the block device. Valid values are `volume`, `snapshot`, `image` and `blank`. `ID`: The ID of the source object. `DEST`: The type of the target virtual device. Valid values are `volume` and `local`. `SIZE`: The size of the volume that will be created. `PRESERVE`: What to do with the volume when the instance is terminated. `preserve` will not delete the volume, `remove` will. `INDEX`: Used to order the boot disks. Use `0` to boot from this volume.
`NAME`	The name for the server.

Create a bootable volume from an image, before the instance boots. The volume is not deleted when the instance is terminated:

$ nova boot --flavor 2 \
    --block-device source=image,id=e0b7734d-2331-42a3-b19e-067adc0da17d,dest=volume,size=10,shutdown=preserve,bootindex=0 \
    myInstanceFromVolume
+--------------------------------------+-------------------------------------------------+
| Property                             | Value                                           |
+--------------------------------------+-------------------------------------------------+
| OS-EXT-STS:task_state                | scheduling                                      |
| image                                | Attempt to boot from volume - no image supplied |
| OS-EXT-STS:vm_state                  | building                                        |
| OS-EXT-SRV-ATTR:instance_name        | instance-00000003                               |
| OS-SRV-USG:launched_at               | None                                            |
| flavor                               | m1.small                                        |
| id                                   | 2e65c854-dba9-4f68-8f08-fe332e546ecc            |
| security_groups                      | [{u'name': u'default'}]                         |
| user_id                              | 352b37f5c89144d4ad0534139266d51f                |
| OS-DCF:diskConfig                    | MANUAL                                          |
| accessIPv4                           |                                                 |
| accessIPv6                           |                                                 |
| progress                             | 0                                               |
| OS-EXT-STS:power_state               | 0                                               |
| OS-EXT-AZ:availability_zone          | nova                                            |
| config_drive                         |                                                 |
| status                               | BUILD                                           |
| updated                              | 2014-02-02T13:29:54Z                            |
| hostId                               |                                                 |
| OS-EXT-SRV-ATTR:host                 | None                                            |
| OS-SRV-USG:terminated_at             | None                                            |
| key_name                             | None                                            |
| OS-EXT-SRV-ATTR:hypervisor_hostname  | None                                            |
| name                                 | myInstanceFromVolume                            |
| adminPass                            | TzjqyGsRcJo9                                    |
| tenant_id                            | f7ac731cc11f40efbc03a9f9e1d1d21f                |
| created                              | 2014-02-02T13:29:53Z                            |
| os-extended-volumes:volumes_attached | []                                              |
| metadata                             | {}                                              |
+--------------------------------------+-------------------------------------------------+

List volumes to see the bootable volume and its attached myInstanceFromVolume instance:

$ cinder list
+--------------------------------------+--------+--------------+------+-------------+----------+--------------------------------------+
|                  ID                  | Status | Display Name | Size | Volume Type | Bootable |             Attached to              |
+--------------------------------------+--------+--------------+------+-------------+----------+--------------------------------------+
| 2fff50ab-1a9c-4d45-ae60-1d054d6bc868 | in-use |              |  10  |     None    |   true   | 2e65c854-dba9-4f68-8f08-fe332e546ecc |
+--------------------------------------+--------+--------------+------+-------------+----------+--------------------------------------+

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