Quoting Lennart Poettering (lenn...@poettering.net): > On Thu, 25.10.12 14:02, Serge Hallyn (serge.hal...@canonical.com) wrote: > > > > > Ok... I've done some cursory search and turned up nothing but some > > > > comments about "pre mount hooks". Where is the documentation about this > > > > feature and how I might use / implement it? Some examples would > > > > probably suffice. Is there a require release version of lxc-utils? > > > > > > I think I found what I needed in the changelog here: > > > > > > http://www.mail-archive.com/lxc-devel@lists.sourceforge.net/msg01490.html > > > > > > I'll play with it and report back. > > > > Also the "Lifecycle management hooks" section in > > https://help.ubuntu.com/12.10/serverguide/lxc.html > > > > Note that I'm thinking that having lxc-start guess how to fill in /dev > > is wrong, because different distros and even different releases of the > > same distros have different expectations. For instance ubuntu lucid > > wants /dev/shm to be a directory, while precise+ wants a symlink. So > > somehow the template should get involved, be it by adding a hook, or > > simply specifying a configuration file which lxc uses internally to > > decide how to create /dev. > > /dev/shm can be created/mounted/symlinked by the OS in the > container. This is nothing LXC should care about. > > My recommendation for LXC would be to unconditionally pre-mount /dev as > tmpfs, and add exactly the device nodes /dev/null, /dev/zero, /dev/full, > /dev/urandom, /dev/random, /dev/tty, /dev/ptmx to it. That is the > minimal set you need to boot a machine. All further > submounts/symlinks/dirs can be created by the OS boot logic in the > container.
I'm thinking we'll do that, optionally. Templates (including fedora and ubuntu) can simply always set the option to mount and fill /dev. Others (like busybox and mini-sshd) won't. > That's what libvirt-lxc and nspawn do, and is what we defined in: > > http://www.freedesktop.org/wiki/Software/systemd/ContainerInterface > > It would be good if LXC would do the same in order to minimize the > manual user configuration necessary. > > Lennart Agreed it simplifies things for full system containers with modern distros. thanks, -serge _______________________________________________ systemd-devel mailing list systemd-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/systemd-devel