On 11/09/2012 05:13:14 PM, Dan Kegel wrote: > On Fri, Nov 9, 2012 at 3:03 PM, Whit Blauvelt <w...@transpect.com> > wrote: > >> > mount -o bind /var/lib/lxc/guest/rootfs/mnt/xyz > /var/lib/lxc/guest/rootfs/mnt/xyz > >> > brings the mount into visibility on the guest. > >> > >> IIRC, that failed with NFS for me. You may be lucky you're using > CIFS. > > > > You mounted NFS on the host, and then tried to bind it to the > guest? Didn't > > work? > > Right. As I recall, the system exploded. Or at least did not work > properly after that. Hung on file access, maybe. It was painful > enough that I've purged the incident from memory, and just > avoid nfs inside lxc.
I fixed cifs to be container aware back in 2010. I spent months examining NFS trying to do similar fixes, but NFS is a crawling horror full of bad ideas like superblock merging, and the NFS v2, v3, v4, and v4.1 (pnfs) protocols have an awful lot of divergent spaghetti codepaths. Making CIFS container-aware was a couple lines. Doing the same for NFS is a thesis project. (It's not that NFS and containers and NFS don't mix, it's that NFS and _anything_ doesn't mix. Only Sun could design a "stateless filesystem server" when the point of a filesystem is to maintain state. The whole design is a giant contradiction in terms with decades of crap built on top to try to bury the bad ideas under so much complexity the problems are less obvious. I'll stop now.) Really: go look at the Plan 9 filesystem (the "9p" driver, the userspace TCP/IP server is called "diod", and kvm has a built-in 9p server called "virtfs" using a virtio transport. It's been in the kernel for years and uses the same "one pipe per mount" connection type of CIFS (so you can use it over a serial port if you really need to), but unlike that windows-derived monstrosity the protocol going over said pipe is not crazy. I posted a patch to containerize 9p over a year ago, never checked if it got merged: http://marc.info/?l=v9fs-developer&m=130597202601764 Rob ------------------------------------------------------------------------------ Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_nov _______________________________________________ Lxc-users mailing list Lxc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/lxc-users
