Recently we switched our 9p filesystem usage in CoreOS Assembler to use virtiofs.
This is the technology behind a lot of new lightweight container VM technology like kata-containers and libkrun, but can also be easily used with libvirt.
Running as non-root using qemu:///session
Currently the virtiofs integration doesn’t work as non-root via a
qemu:///session connection. There is an oustanding RFE for this
upstream
and downstream
in RHEL that can be followed for updates.
virtiosfs with virt-install
I typically use virt-install to automate creation of my libvirt virtual
machines. Using virt-install we can use the --filesystem= and
--memorybacking= parameters to get what we want. The
--memorybacking= parameter will add shared memory to the instance,
which is required
for virtiofs.