matheusfontes opened a new issue, #12820:
URL: https://github.com/apache/cloudstack/issues/12820
### problem
Volume migration between Ceph RBD primary storages fails in CloudStack 4.22
because the destination is incorrectly treated as a local file path instead of
an RBD URI.
In CloudStack 4.22, migrating a volume from one Ceph RBD primary storage to
another fails during the qemu-img convert operation.
The system attempts a direct primary-to-primary migration (which is expected
behavior in newer versions), but the destination is incorrectly passed as a
local filesystem path instead of an RBD URI.
As a result, the migration fails with:
qemu-img: CEPH2_NVME/<uuid>.raw: error while converting raw:
Could not create 'CEPH2_NVME/<uuid>.raw': No such file or directory
From the agent logs:
qemu-img convert -O raw -U \
rbd:CEPH1_SATA/<source-volume>:mon_host=...:auth_supported=cephx:id=... \
CEPH2_NVME/<destination-volume>.raw
Expected behavior:
qemu-img convert -O raw \
rbd:CEPH1_SATA/<source-volume> \
rbd:CEPH2_NVME/<destination-volume>
The destination is missing the rbd: prefix and is incorrectly suffixed with
.raw, causing qemu-img to treat it as a local file path.
### versions
• Apache CloudStack: 4.22.0
• Hypervisor: KVM
• OS: Ubuntu 22.04 and 24.04
• qemu-img version: 6.2.0 (Debian 1:6.2+dfsg-2ubuntu6.27)
• Ceph version: Source: Octopus / Destination: Reef
### The steps to reproduce the bug
1. Configure two Ceph RBD primary storages in the same zone:
• Source: CEPH1
• Destination: CEPH2
2. Ensure both are accessible from KVM hosts.
3. Create a volume in CEPH1
4. Attempt to migrate the volume to CEPH2 using:
• CloudStack UI
select volume -> click on Migrate Volume -> Select CEPH2
storage pool
• cmk call
migrate volume storageid=CEPH2_ID
volumeid=VOLUME_ID_HOSTED_IN_CEPH1
5. Observe failure during migration.
### What to do about it?
• Ensure the destination is correctly formatted as an RBD URI
(rbd:pool/image)
• Validate logic in LibvirtStorageAdaptor (KVM) for RBD-to-RBD
migration path
• Possibly introduce fallback to secondary storage if direct
conversion fails
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