Create an image (nova)You can use the nova client to take a snapshot of a running instance to
create an image.To minimize the potential for data loss and ensure that you create an accurate image, you
should shut down the instance before you take a snapshot.Write any buffered data to disk.For more information, see Taking Snapshots in the OpenStack Operations
Guide.List instances to get the server name:$nova list+--------------------------------------+----------------------+--------+------------+-------------+------------------+
| ID | Name | Status | Task State | Power State | Networks |
+--------------------------------------+----------------------+--------+------------+-------------+------------------+
| 84c6e57d-a6b1-44b6-81eb-fcb36afd31b5 | myCirrosServer | ACTIVE | None | Running | private=10.0.0.3 |
+--------------------------------------+----------------------+--------+------------+-------------+------------------+In this example, the instance is named myCirrosServer.Use this instance to create a snapshot:$nova image-create myCirrosServer myCirrosImageThe command creates a snapshot and automatically uploads the image to your
repository.For snapshots that you create from an instance that was booted from a
volume:The snapshot is based on the volume that is attached to the instance
through the Block Storage service.No data is uploaded to the Image Service.You can find information about the snapshot in the properties of the
image.Get details for your image to check its status:$nova image-show myCirrosImage+-------------------------------------+--------------------------------------+
| Property | Value |
+-------------------------------------+--------------------------------------+
| metadata owner_id | 66265572db174a7aa66eba661f58eb9e |
| minDisk | 0 |
| metadata instance_type_name | m1.small |
| metadata instance_type_id | 5 |
| metadata instance_type_memory_mb | 2048 |
| id | 7e5142af-1253-4634-bcc6-89482c5f2e8a |
| metadata instance_type_root_gb | 20 |
| metadata instance_type_rxtx_factor | 1 |
| metadata ramdisk_id | 3cf852bd-2332-48f4-9ae4-7d926d50945e |
| metadata image_state | available |
| metadata image_location | snapshot |
| minRam | 0 |
| metadata instance_type_vcpus | 1 |
| status | ACTIVE |
| updated | 2013-07-22T19:46:42Z |
| metadata instance_type_swap | 0 |
| metadata instance_type_vcpu_weight | None |
| metadata base_image_ref | 397e713c-b95b-4186-ad46-6126863ea0a9 |
| progress | 100 |
| metadata instance_type_flavorid | 2 |
| OS-EXT-IMG-SIZE:size | 14221312 |
| metadata image_type | snapshot |
| metadata user_id | 376744b5910b4b4da7d8e6cb483b06a8 |
| name | myCirrosImage |
| created | 2013-07-22T19:45:58Z |
| metadata instance_uuid | 84c6e57d-a6b1-44b6-81eb-fcb36afd31b5 |
| server | 84c6e57d-a6b1-44b6-81eb-fcb36afd31b5 |
| metadata kernel_id | df430cc2-3406-4061-b635-a51c16e488ac |
| metadata instance_type_ephemeral_gb | 0 |
+-------------------------------------+--------------------------------------+The image status changes from SAVING to
ACTIVE. Only the tenant who creates the image has access to
it.To launch an instance from your image, include the image ID and flavor ID, as in the
following example:$nova boot newServer --image 7e5142af-1253-4634-bcc6-89482c5f2e8a \
--flavor 3+-------------------------------------+--------------------------------------+
| Property | Value |
+-------------------------------------+--------------------------------------+
| OS-EXT-STS:task_state | scheduling |
| image | myCirrosImage |
| OS-EXT-STS:vm_state | building |
| OS-EXT-SRV-ATTR:instance_name | instance-00000007 |
| flavor | m1.medium |
| id | d7efd3e4-d375-46d1-9d57-372b6e4bdb7f |
| security_groups | [{u'name': u'default'}] |
| user_id | 376744b5910b4b4da7d8e6cb483b06a8 |
| 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 | 2013-07-22T19:58:33Z |
| hostId | |
| OS-EXT-SRV-ATTR:host | None |
| key_name | None |
| OS-EXT-SRV-ATTR:hypervisor_hostname | None |
| name | newServer |
| adminPass | jis88nN46RGP |
| tenant_id | 66265572db174a7aa66eba661f58eb9e |
| created | 2013-07-22T19:58:33Z |
| metadata | {} |
+-------------------------------------+--------------------------------------+