RBD Namespace

[Rodrigo Prieto <rodrigoprieto2019@xxxxxxxxx>]

Hello, I want to connect to an RBD pool specifying the namespace, but it doesn’t work. If I connect directly to the pool, it works. For example:

<source protocol="rbd" name="rbd-pool/vm">

But when I try to specify the namespace like this, I cannot connect:

<source protocol="rbd" name="rbd-pool/vm" namespace="vms">

<source protocol="rbd" name="rbd-pool/vms/vm">

Error al iniciar dominio: error interno: process exited while connecting to monitor: 2025-06-20T22:54:55.076193Z qemu-system-x86_64: -blockdev {"driver":"rbd","pool":"rbd-pool","image":"loli/mari","server":[{"host":"ceph-admin","port":"6789"}],"user":"admin","auth-client-required":["cephx","none"],"key-secret":"libvirt-2-storage-auth-secret0","node-name":"libvirt-2-storage","auto-read-only":true,"discard":"unmap"}: error reading header from loli/mari: No such file or directory

Using the rbd command from the terminal, I can connect both ways; the error occurs only with libvirt.

I’m using the following versions on Debian 12:
libvirtd (libvirt) 9.0.0
QEMU emulator version 7.2.17 (Debian 1:7.2+dfsg-7+deb12u13)
Copyright (c) 2003-2022 Fabrice Bellard and the QEMU Project developers

Thanks.