virtio-fs

• virtio-fs - A Shared File System for Virtual Machines
  • File System as a Service
  • Boot guest from directory on host
  • Linux FUSE as Protocol
  • VIRTIO as Transport
    • shared memory resources
• 9p
  • https://www.linux-kvm.org/page/9p_virtio
  • https://wiki.qemu.org/Documentation/9psetup
  • https://kernel.taobao.org/2019/11/virtio-fs-intro-and-perf-optimize/
  • 使用 host 上 overlayfs，能充分利用 host pagecache；部署简单，不需要额外的组件

<!-- libvirtd -->
<filesystem type='mount' accessmode='passthrough'>
  <driver type='virtiofs'/>
  <source dir='/var/www'/>
  <target dir='website'/> <!-- not treated as a path -->
</filesystem>

mount -t virtiofs website /var/www