How to create a shared Disk with the image stored on Host in KVM?

Question

I am currently trying to setup a disk, using the raw img format on the host, which is then shared between multiple guest VMs (which are running Alpine Linux), using the libvirt / KVM virtualization platform. While I attached the disk to different guest VMs (the disk is given the <shareable/> tag in the XML configuration), it seems to work fine except that the disk needs to be remounted to check for any changes by other VMs. I searched online and found that NFS and Samba are alternatives to this which can allow multiple VMs to read/write at the same time, but is it possible to have this functionality without networking? I wanted to use just the "Storage" to enable a shared disk between these multiple VMs.