GlusterFS pools - do they work?

Hi guys. I've been a consumer of libvirt for a while but this is first time I'm trying this: -> $ virsh vol-create-as glusterfs-VMs2 fcos-node1.qcow2 20G --format qcow2 error: Failed to create vol fcos-node1.qcow2 error: this function is not supported by the connection driver: storage pool does not support volume creation I'm on CentOS Stream with glusterfs-8.4, libvirt-7 and qemu-kvm-5.2.0 What might be the issue here? many thanks, L.