Transferring volumes between projects

There is no direct way to migrate a virtual machine between different projects. However, you can transfer the VM boot volume, and then create a new VM from it. You can transfer both boot and non-boot volumes to projects within different domains.

Limitations

• You can only transfer volumes with the "Available" status.
• Transferring volumes that have snapshots breaks the snapshots.

Prerequisites

• To authorize further OpenStack commands, the OpenStack command-line client must be configured, as outlined in Connecting to OpenStack command-line interface.
• You have login credentials for the source and destination projects.
• If you want to transfer a boot volume that is attached to a VM, clone this volume first, as described in Cloning volumes.
• If you want to transfer a non-boot volume that is attached to a VM, detach it first, as described in Attaching and detaching volumes.

To transfer a volume between two projects

1. Log in to the source project by changing the environment variables to the project credentials. For example:

   export OS_PROJECT_DOMAIN_NAME=domain1
   export OS_USER_DOMAIN_NAME=domain1
   export OS_PROJECT_NAME=project1
   export OS_USERNAME=user1
   export OS_PASSWORD=password

2. List all volumes within your project to find out the ID of the volume you want to transfer:

   # openstack --insecure volume list
   +--------------------------------------+-------------------+-----------+------+
   | ID                                   | Name              | Status    | Size |
   +--------------------------------------+-------------------+-----------+------+
   | 2c8386fa-331b-4ba8-9e4c-de690969a4c8 | win10/Boot volume | available |   64 |
   +--------------------------------------+-------------------+-----------+------+

3. Create a transfer request by specifying the ID of the chosen volume. For example:

   # openstack --insecure volume transfer request create c0d4cf0e-48e3-417d-b6fc-f1fb36571c5f
   +------------+--------------------------------------+
   | Field      | Value                                |
   +------------+--------------------------------------+
   | auth_key   | 75fcf37d56f40182                     |
   | created_at | 2022-04-27T09:00:11.776511           |
   | id         | b9b835a3-ed41-489a-9552-483fae33c549 |
   | name       | None                                 |
   | volume_id  | c0d4cf0e-48e3-417d-b6fc-f1fb36571c5f |
   +------------+--------------------------------------+
   

   Save the request id and auth-key from the command output, to accept the transfer in the other project.

4. Log in to the destination project by changing the environment variables to the project credentials. For example:

   export OS_PROJECT_DOMAIN_NAME=domain1
   export OS_USER_DOMAIN_NAME=domain1
   export OS_PROJECT_NAME=project2
   export OS_USERNAME=user2
   export OS_PASSWORD=password

5. Accept the transfer request by specifying the request ID and authorization key. For example:

   # openstack --insecure volume transfer request accept --auth-key 75fcf37d56f40182 \
   b9b835a3-ed41-489a-9552-483fae33c549

Once the volume is moved to the other project, you can create a virtual machine from it.