In this guide we will provide a way to migrate your VMs with ephemeral storage, block storage, and object storage.
Migrating a VM from Quobyte to Ceph storage means moving from m1 to m2 flavor. To do that, you need to create an image of the VM with ephemeral storage and then create a new VM based on the that image.
WARNING: Creating instance image of your server will make it unresponsive for a period of time (depending on the disk size).
Create an image:
openstack server image create <server> --name <target-image-name>Wait until the image reaches an active state:
openstack image show <target-image> -c statusCreate a new VM with an m2 flavor based on the created image:
openstack server create <server-name> --image <image> --flavor m2.<size>If the old and new VMs are not in the same region, you will need to download the created image and upload it to the new region:
openstack --os-region <source-region> image save <image> --file <filename>
openstack --os-region <target-region> image create <image-name> --file <filename>
Block storage volumes can also be migrated by creating an image of the existing one and then creating a new volume based on that image.
WARNING: Volume snapshots can only be created while the volume is detached.
Create an image:
openstack image create <target-image-name> --volume <volume>
Wait until the image reaches an active state:
openstack image show <target-image> -c status
Create a new volume based on the created image and make sure you specify the volume type as ceph:
openstack volume create <name> --image <image> --type ceph --size <size>If the old and new volumes are not in the same region, you will need to download the created image and upload it to the new region:
openstack --os-region <source-region> image save <image> --file <filename>
openstack --os-region <target-region> image create <image-name> --file <filename>
For Quobyte-based object storage (s3.REGION.cloud.syseleven.net) and ceph-based (objectstorage.fes.cloud.syseleven.net) the same access/secret key pair can be used.
There are no special tools available to move/copy buckets or partial content internally between two object storage clusters. You will need to download the content and upload it again with your choice of tools.