https://dustymabe.com/tags/libvirt-virtiofs/ Recent content in Libvirt Virtiofs on A Random Walk Down Tech Street Hugo en-us Fri, 08 Sep 2023 00:00:00 +0000 https://dustymabe.com/2023/09/08/using-virtiofs-with-libvirt/virt-install/ Fri, 08 Sep 2023 00:00:00 +0000 https://dustymabe.com/2023/09/08/using-virtiofs-with-libvirt/virt-install/ <p>Recently we <a href="https://github.com/coreos/coreos-assembler/pull/3428">switched</a> our 9p filesystem usage in CoreOS Assembler to use <a href="https://virtio-fs.gitlab.io/">virtiofs</a>.</p> <p>This is the technology behind a lot of new lightweight container VM technology like <a href="https://katacontainers.io/">kata-containers</a> and <a href="https://github.com/containers/libkrun">libkrun</a>, but can also be easily used with <a href="https://libvirt.org/">libvirt</a>.</p> <h2 id="running-as-non-root-using-qemusession">Running as non-root using qemu:///session</h2> <p>Currently the virtiofs integration doesn&rsquo;t work as non-root via a <code>qemu:///session</code> connection. There is an oustanding RFE for this <a href="https://gitlab.com/libvirt/libvirt/-/issues/535">upstream</a> and <a href="https://bugzilla.redhat.com/show_bug.cgi?id=2034630">downstream</a> in RHEL that can be followed for updates.</p> <h2 id="virtiosfs-with-virt-install">virtiosfs with virt-install</h2> <p>I typically use <code>virt-install</code> to automate creation of my libvirt virtual machines. Using <code>virt-install</code> we can use the <code>--filesystem=</code> and <code>--memorybacking=</code> parameters to get what we want. The <code>--memorybacking=</code> parameter will add shared memory to the instance, which is <a href="https://libvirt.org/kbase/virtiofs.html#other-options-for-vhost-user-memory-setup">required</a> for virtiofs.</p>