add guide on how to migrate from quobyte to ceph

user/pages/03.Howtos/16.migrate-quobyte-to-ceph/docs.en.md

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+---
+title: 'How to Migrate From Quobyte to Ceph Storage'
+date: '28-11-2024 02:48'
+taxonomy:
+    category:
+        - docs
+---
+
+## Overview
+
+In this guide we will provide a way to migrate your VMs with ephemeral storage, block storage, and object storage.
+
+## Compute Workloads (VM flavor and ephemeral 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:
+
+```shell
+openstack server image create <server> --name <target-image-name>
+```
+
+Wait until the image reaches an active state:
+
+```shell
+openstack image show <target-image> -c status
+```
+
+Create a new VM with an *m2* flavor based on the created image:
+
+```shell
+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:
+
+```shell
+openstack --os-region <source-region> image save <image> --file <filename>
+openstack --os-region <target-region> image create <image-name> --file <filename>
+
+```
+
+
+## Block Storage Volumes
+
+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: Creating instance image of your server will make it unresponsive for a period of time (depending on the disk size).
+
+Create an image:
+
+```shell
+openstack image create <target-image-name> --volume <volume>
+
+```
+
+Wait until the image reaches an active state:
+
+```shell
+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`:
+
+```shell
+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:
+
+```shell
+openstack --os-region <source-region> image save <image> --file <filename>
+openstack --os-region <target-region> image create <image-name> --file <filename>
+
+```
+
+
+## Object Storage
+
+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.