GlusterFS pools - do they work?

[lejeczek <peljasz@xxxxxxxxxxx>]

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.