jeanvetorello opened a new issue, #11724:
URL: https://github.com/apache/cloudstack/issues/11724
### problem
The snapshot should be successfully created on the Ceph primary and then
backed up to the NFS secondary storage.
Actual Behavior
The snapshot was created on Ceph successfully (rbd snap create worked).
The backup to the NFS secondary failed.
The KVM agent logs show that libvirt could not mount the NFS storage pool:
libvirt failed to mount storage pool 21c57ab7-9630-3817-b953-e46a7efcf2b7 at
/mnt/21c57ab7-9630-3817-b953-e46a7efcf2b7
Full stack trace excerpt:
com.cloud.utils.exception.CloudRuntimeException: libvirt failed to mount
storage pool 21c57ab7-9630-3817-b953-e46a7efcf2b7 at
/mnt/21c57ab7-9630-3817-b953-e46a7efcf2b7
at
com.cloud.hypervisor.kvm.storage.LibvirtStorageAdaptor.checkNetfsStoragePoolMounted(LibvirtStorageAdaptor.java:314)
at
com.cloud.hypervisor.kvm.storage.LibvirtStorageAdaptor.createStoragePool(LibvirtStorageAdaptor.java:881)
at
com.cloud.hypervisor.kvm.storage.KVMStoragePoolManager.createStoragePool(KVMStoragePoolManager.java:390)
...
Notes
The Ceph snapshot creation worked fine (Successfully connected to Ceph
cluster and Attempting to create RBD snapshot ... succeeded).
The failure happens in the CopyCommand when CloudStack tries to back up the
snapshot to NFS.
The mountpoint -q check returns exit code 32, causing libvirt to fail
mounting the NFS path.
### versions
Environment
CloudStack Management Server: 4.21
CloudStack Agent (KVM): 4.21
Hypervisor: KVM on Ubuntu 22.04.5 LTS
Primary Storage: Ceph RBD (ceph version 19.2.3)
Secondary Storage: NFSv4 on cephnfs
### The steps to reproduce the bug
Steps to Reproduce
Go to Volumes in the CloudStack UI.
Select a ROOT volume (on Ceph primary).
Click Take Snapshot
<img width="439" height="718" alt="Image"
src="https://github.com/user-attachments/assets/b0d434a6-4698-4fd0-b353-a244112a9dae";
/>
<img width="1774" height="882" alt="Image"
src="https://github.com/user-attachments/assets/4037df72-39f5-422b-98fb-130fc7c3c543";
/>
<img width="807" height="866" alt="Image"
src="https://github.com/user-attachments/assets/1ceed232-1dfd-4c6f-9e35-954be2986410";
/>
### What to do about it?
Workaround Attempted
I tested with the patch from [PR
#11690](https://github.com/apache/cloudstack/pull/11690)
, which disables the mountpoint check for NFS pools.
With this patch applied, the snapshot creation on Ceph succeeds.
However, the copy to NFS secondary still fails with the same libvirt mount
error.
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