Hello Matias, Thank you for chiming in, libkrun indeed seems very promising and, very importantly, pretty valuable from an end-user perspective if it becomes practical! To my eyes, virtio-fs makes most sense in such setups: it's kind of the equivalent of bind mounts in Docker terminology.
On a side note, it's started by some very prominent people in the lightweight virtualization community. P.S. It's great to have such, more general, discussions or even sharing resources and perspectives. I wouldn't want to hijack this thread, but feel free to start a fresh one if you 'd like to continue this discussion. On Wednesday, March 31, 2021 at 9:39:29 PM UTC+3 matia...@gmail.com wrote: > Hello, > > I think it may be interesting to have a look at libkrun ( > https://github.com/containers/libkrun). As far I know, it supports > virtio-fs. > > Matias > > On Wed, 31 Mar 2021 at 16:55, Fotis Xenakis <fo...@windowslive.com> wrote: > >> On Tuesday, March 30, 2021 at 9:23:24 PM UTC+3 jwkoz...@gmail.com wrote: >> >>> Fotis, >>> >>> Thanks a lot! >>> >>> I have updated this page to include the information about ARM - >>> virtio-fs works on this arch as well which is great! >>> >> It is awesome to hear that! What would be mildly surprising is if DAX >> also worked on ARM (on the host/QEMU side as well, given it's not yet fully >> stable). >> >>> >>> The virtio-fs support is probably the single most exciting new feature >>> added to OSv in the last couple of years! I am not aware of any other >>> unikernel supporting it. >>> >> It sure has a great value to dev effort ratio! The only other unikernel >> supporting it is toro AFAIK: https://github.com/torokernel/torokernel >> >>> >>> Thanks a lot, >>> Waldek >>> >>> PS. It would be nice if some other hypervisors (thinking of firecracker) >>> supported virtio-fs as well. >>> >> Indeed, it seems a great fit for the lightweight VMMs. Firecracker was >> close to adding it, but eventually did not: >> https://github.com/firecracker-microvm/firecracker/pull/1351 >> Yet, cloud-hypervisor does support it, notably with the contributions of >> upstream virtio-fs devs: >> https://github.com/cloud-hypervisor/cloud-hypervisor/blob/v0.14.0/docs/fs.md >> >>> >>> On Friday, March 26, 2021 at 1:44:30 PM UTC-4 Fotis Xenakis wrote: >>> >>>> Update: the wiki page is here: >>>> https://github.com/cloudius-systems/osv/wiki/virtio-fs >>>> All questions/feedback and of course contributions welcome! >>>> >>>> On Saturday, March 13, 2021 at 9:04:03 PM UTC+2 Fotis Xenakis wrote: >>>> >>>>> You are absolutely right, some proper guide and documentation is >>>>> necessary, thank you for the suggestion! >>>>> I shall take care of it upon first chance. >>>>> >>>>> On Saturday, March 13, 2021 at 6:29:28 PM UTC+2 jwkoz...@gmail.com >>>>> wrote: >>>>> >>>>>> Hey, >>>>>> >>>>>> I have applied 3 of your patches. >>>>>> >>>>>> As I was doing and testing it I realized we do not have any Wiki page >>>>>> that describes how to use virtio-fs with OSv. Would you have a bit of >>>>>> time >>>>>> to add a page that does so - a simple step-by-step cookbook - how to >>>>>> build >>>>>> with export and fs options, and then run with various new options (DAX, >>>>>> no >>>>>> dax, etc), need to use sudo, which version of QEMU, etc - >>>>>> https://github.com/cloudius-systems/osv/wiki? Maybe also link to >>>>>> your QEMU article? >>>>>> >>>>>> Right now we have some info scattered acros some commit messages but >>>>>> nothing in one place. >>>>>> >>>>>> I would really appreciate it, >>>>>> Waldek >>>>>> >>>>>> On Saturday, March 6, 2021 at 4:34:31 PM UTC-5 Fotis Xenakis wrote: >>>>>> >>>>>>> Signed-off-by: Fotis Xenakis <fo...@windowslive.com> >>>>>>> --- >>>>>>> scripts/run.py | 5 ++++- >>>>>>> 1 file changed, 4 insertions(+), 1 deletion(-) >>>>>>> >>>>>>> diff --git a/scripts/run.py b/scripts/run.py >>>>>>> index 71c6cdd7..6a81e98b 100755 >>>>>>> --- a/scripts/run.py >>>>>>> +++ b/scripts/run.py >>>>>>> @@ -178,9 +178,10 @@ def start_osv_qemu(options): >>>>>>> "-drive", "file=%s,if=none,id=hd1" % (options.cloud_init_image)] >>>>>>> >>>>>>> if options.virtio_fs_tag: >>>>>>> + dax = (",cache-size=%s" % options.virtio_fs_dax) if >>>>>>> options.virtio_fs_dax else "" >>>>>>> args += [ >>>>>>> "-chardev", "socket,id=char0,path=/tmp/vhostqemu", >>>>>>> - "-device", >>>>>>> "vhost-user-fs-pci,queue-size=1024,chardev=char0,tag=%s" % >>>>>>> options.virtio_fs_tag, >>>>>>> + "-device", >>>>>>> "vhost-user-fs-pci,queue-size=1024,chardev=char0,tag=%s%s" % >>>>>>> (options.virtio_fs_tag, dax), >>>>>>> "-object", >>>>>>> "memory-backend-file,id=mem,size=%s,mem-path=/dev/shm,share=on" % >>>>>>> options.memsize, >>>>>>> "-numa", "node,memdev=mem"] >>>>>>> >>>>>>> @@ -602,6 +603,8 @@ if __name__ == "__main__": >>>>>>> help="virtio-fs device tag") >>>>>>> parser.add_argument("--virtio-fs-dir", action="store", >>>>>>> help="path to the directory exposed via virtio-fs mount") >>>>>>> + parser.add_argument("--virtio-fs-dax", action="store", >>>>>>> + help="DAX window size for virtio-fs device (disabled if not >>>>>>> specified)") >>>>>>> parser.add_argument("--mount-fs", default=[], action="append", >>>>>>> help="extra mounts (forwarded to respective kernel command line >>>>>>> option)") >>>>>>> parser.add_argument("--ip", default=[], action="append", >>>>>>> -- >>>>>>> 2.30.1 >>>>>>> >>>>>>> -- >> You received this message because you are subscribed to the Google Groups >> "OSv Development" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to osv-dev+u...@googlegroups.com. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/osv-dev/538fe958-fb89-4286-8cb5-a0dc4664ae72n%40googlegroups.com >> >> <https://groups.google.com/d/msgid/osv-dev/538fe958-fb89-4286-8cb5-a0dc4664ae72n%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> > -- You received this message because you are subscribed to the Google Groups "OSv Development" group. 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