Create Instance Snapshot and importing snapshot as image

A snapshot can be used as a backup or template for creating new instances.

Creating Snapshots from Instance

Web Interface

1. Go to Compute → Instance in Web Interface (https://openstack.stfc.ac.uk/)

2. Shut off your instance by clicking the drop-down menu on the right-hand side (in Actions column) and select SHUT OFF INSTANCE

3. Create a Snapshot by clicking the drop-down menu on the right-hand side (in Actions column) and select CREATE SNAPSHOT

4. Give it a name and click CREATE SNAPSHOT

Command-Line

Note

See Using OpenStack Command-line Interface on how to set-up the command line client.

1. Find the server ID (Instance) using the command below

$ openstack server list
+--------------------------------------+--------------------------+---------+----------------------------------------+---------------------------------------------------------+--------------+
| ID                                   | Name                     | Status  | Networks                               | Image                                                   | Flavor       |
+--------------------------------------+--------------------------+---------+----------------------------------------+---------------------------------------------------------+--------------+
| b5acb398-76b4-48fe-9b9a-d480636fdfd9 | test-rebuild             | ACTIVE  | Internal=172.16.101.195                | ubuntu-focal-20.04-gui                                  | c3.small     |
+--------------------------------------+--------------------------+---------+----------------------------------------+---------------------------------------------------------+--------------+

2. Shut down the instance using

$ openstack server stop <server-id>

#example
$ openstack server stop b5acb398-76b4-48fe-9b9a-d480636fdfd9

3. Confirm that the server is shut-off

$ openstack server list
+--------------------------------------+--------------------------+---------+----------------------------------------+---------------------------------------------------------+--------------+
| ID                                   | Name                     | Status  | Networks                               | Image                                                   | Flavor       |
+--------------------------------------+--------------------------+---------+----------------------------------------+---------------------------------------------------------+--------------+
| b5acb398-76b4-48fe-9b9a-d480636fdfd9 | test-rebuild             | SHUTOFF | Internal=172.16.101.195                | ubuntu-focal-20.04-gui                                  | c3.small     |
+--------------------------------------+--------------------------+---------+----------------------------------------+---------------------------------------------------------+--------------+

4. Use openstack server image create to create a snapshot

$ openstack server image create --name test-snapshot b5acb398-76b4-48fe-9b9a-d480636fdfd9
+------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Field      | Value                                                                                                                                                                                                                                                                                                                                                            |
+------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| created_at | 2021-12-03T12:37:40Z                                                                                                                                                                                                                                                                                                                                             |
| file       | /v2/images/2b9c6711-4dd8-4e5c-9edc-dd106b8319b5/file                                                                                                                                                                                                                                                                                                             |
| id         | 2b9c6711-4dd8-4e5c-9edc-dd106b8319b5                                                                                                                                                                                                                                                                                                                             |
| min_disk   | 20                                                                                                                                                                                                                                                                                                                                                               |
| min_ram    | 0                                                                                                                                                                                                                                                                                                                                                                |
| name       | test-snapshot                                                                                                                                                                                                                                                                                                                                                    |
| owner      | fa0f417fb4b5462791e4320e317eb2d2                                                                                                                                                                                                                                                                                                                                 |
| properties | base_image_ref='90e1b77b-4192-46f1-8d9c-49fc36d9b54c', boot_roles='user', clean_attempts='2', description='Ubuntu-Focal-Gui', image_location='snapshot', image_state='available', image_type='snapshot', instance_uuid='b5acb398-76b4-48fe-9b9a-d480636fdfd9', locations='[]', os_distro='Ubuntu', os_hidden='False', os_variant='Gui', os_version='20.04-Focal' |
| protected  | False                                                                                                                                                                                                                                                                                                                                                            |
| schema     | /v2/schemas/image                                                                                                                                                                                                                                                                                                                                                |
| status     | queued                                                                                                                                                                                                                                                                                                                                                           |
| tags       |                                                                                                                                                                                                                                                                                                                                                                  |
| updated_at | 2021-12-03T12:37:40Z                                                                                                                                                                                                                                                                                                                                             |
| visibility | private                                                                                                                                                                                                                                                                                                                                                          |
+------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+

5. Check the image list

openstack image list
+--------------------------------------+----------------------------------------------------------+-------------+
| ID                                   | Name                                                     | Status      |
+--------------------------------------+----------------------------------------------------------+-------------+
| 2b9c6711-4dd8-4e5c-9edc-dd106b8319b5 | test-snapshot                                            | active      |
+--------------------------------------+----------------------------------------------------------+-------------+

Downloading snapshot

1. Check the image ID of the snapshot

$ openstack image list
+--------------------------------------+----------------------------------------------------------+-------------+
| ID                                   | Name                                                     | Status      |
+--------------------------------------+----------------------------------------------------------+-------------+
| 2b9c6711-4dd8-4e5c-9edc-dd106b8319b5 | test-snapshot                                            | active      |
+--------------------------------------+----------------------------------------------------------+-------------+

2. Run

openstack image save --file <file-name> <image-id>

#example
$ openstack image save --file snapshot.raw 0258526c-f523-4645-8a9d-f6980ad87864

Create new image from snapshot

Import snapshot to project

Note

See Using OpenStack Command-line Interface on how to set-up the command line client.

You must Downloading snapshot to local computer first.

1. Run

openstack image create --container-format bare --disk-format qcow2 --file <path-to-image-file> <name>

Example

$ openstack image create --container-format bare --disk-format qcow2 --file snapshot.raw test-snapshot

Booting From Image

Create a VM and selecting the image as the boot source

Example

1. Find the image ID

$ openstack image list
+--------------------------------------+----------------------------------------------------------+-------------+
| ID                                   | Name                                                     | Status      |
+--------------------------------------+----------------------------------------------------------+-------------+
| 2b9c6711-4dd8-4e5c-9edc-dd106b8319b5 | test-snapshot                                            | active      |
+--------------------------------------+----------------------------------------------------------+-------------+

2. Create the VM

$ openstack server create --flavor c3.small --image 2b9c6711-4dd8-4e5c-9edc-dd106b8319b5 new-instance-from-snapshot