Use snapshots to migrate instancesTo use snapshots to migrate instances from OpenStack projects to clouds, complete these steps.In the source project, perform the following steps:Create a snapshot of the instance.Download the snapshot as an image.In the destination project, perform the following steps:Import the snapshot to the new environment.Boot a new instance from the snapshot.Some cloud providers allow only administrators to perform this task.Create a snapshot of the instanceShut down the source VM before you take the snapshot to ensure that all data is flushed to disk.
If necessary, list the instances to view get the instance name.$nova list+--------------------------------------+------------+--------+------------------------------+
| ID | Name | Status | Networks |
+--------------------------------------+------------+--------+------------------------------+
| c41f3074-c82a-4837-8673-fa7e9fea7e11 | myInstance | ACTIVE | private=10.0.0.3 |
+--------------------------------------+------------+--------+------------------------------+$nova stop exampleUse the nova list command to confirm that the instance shows a
SHUTOFF status.$nova list+--------------------------------------+------------+---------+------------------------------+
| ID | Name | Status | Networks |
+--------------------------------------+------------+---------+------------------------------+
| c41f3074-c82a-4837-8673-fa7e9fea7e11 | myInstance | SHUTOFF | private=10.0.0.3 |
+--------------------------------------+------------+---------+------------------------------+Use the nova
image-create command to take a snapshot. Use the nova
image-list command to check the status until the status
is ACTIVE:$nova image-create --poll myInstance myInstanceSnapshotInstance snapshotting... 50% complete$nova image-list+--------------------------------------+---------------------------------+--------+--------+
| ID | Name | Status | Server |
+--------------------------------------+---------------------------------+--------+--------+
| 657ebb01-6fae-47dc-986a-e49c4dd8c433 | cirros-0.3.2-x86_64-uec | ACTIVE | |
| 72074c6d-bf52-4a56-a61c-02a17bf3819b | cirros-0.3.2-x86_64-uec-kernel | ACTIVE | |
| 3c5e5f06-637b-413e-90f6-ca7ed015ec9e | cirros-0.3.2-x86_64-uec-ramdisk | ACTIVE | |
| f30b204e-1ce6-40e7-b8d9-b353d4d84e7d | myInstanceSnapshot | ACTIVE | |
+--------------------------------------+---------------------------------+--------+--------+Download the snapshot as an imageGet the image ID:$nova image-list+--------------------------------------+-------------------+--------+--------------------------------------+
| ID | Name | Status | Server |
+--------------------------------------+-------------------+--------+--------------------------------------+
| f30b204e-1ce6-40e7-b8d9-b353d4d84e7d | myInstanceSnapshot| ACTIVE | c41f3074-c82a-4837-8673-fa7e9fea7e11 |
+--------------------------------------+-------------------+--------+--------------------------------------+Download the snapshot by using the image ID that
was returned in the previous step:$glance image-download --file snapshot.raw f30b204e-1ce6-40e7-b8d9-b353d4d84e7dThe glance image-download
command requires the image ID and cannot use
the image name.Ensure there is sufficient space on the
destination file system for the image
file.Make the image available to the new environment, either through HTTP or with direct upload to a
machine (scp).Import the snapshot to new environmentIn the new project or cloud environment, import
the snapshot:$glance image-create --copy-from IMAGE_URLBoot a new instance from the snapshotIn the new project or cloud environment, use the
snapshot to create the new instance:$nova boot --flavor m1.tiny --image myInstanceSnapshot myNewInstance