On Mon, 2012-10-22 at 18:05 -0400, Michael H. Warfield wrote: > On Mon, 2012-10-22 at 16:21 -0500, Serge Hallyn wrote: > > Quoting Michael H. Warfield (m...@wittsend.com): > > > On Mon, 2012-10-22 at 15:14 -0500, Serge Hallyn wrote: > > <Trimming some overhead we've seen enough of...> > > > > > How about just a devtmpfs? We actually now do this by default (as of > > > > very > > > > recently) in ubuntu by adding > > > > > > > devtmpfs dev devtmpfs defaults 0 0 > > > > > > NO! That's the problem! That leads to the container connecting to the > > > hosts console and other devices and committing random acts of terrorism. > > > No, it shouldn't, because lxc sets up the console after doing the mounts.
> Damn, dude! That worked! That kludge rang da bell. Of course, I also > discovered the boneheaded typo I had in attempting the tmpfs mount in > the process. :-P I now have a container running systemd up and running > with Fedora 17 in it. Forgot to include the entry I added to the config file to make it all workie... lxc.mount.entry=devtmpfs /srv/lxc/rootfs/dev devtmpfs defaults 0 0 That /srv/lxc/rootfs is my common bind mount for all my containers. > I'm not sure I'm totally happy with it. > Because of doing the devtmpfs thing, the guest can immediately see > things like removable drives coming and going and might, presumably, be > able to mount them. Not thrilled with that from a security standpoint. > Would also mean the guests could access things like my permanent > forensic CDs that are in the CD drives. I guess that can be restricted > in the config but still makes me a bit uncomfortable that the guest has > complete visibility into the hosts dev system. > > Another gotcha, albeit a much more minor one... When systemd drops into > this mode, you no longer have vty consoles available so lxc-console > won't work. That's actually on their page. > > I remember seeing this: > > -- > If systemd detects it is run in a container it will spawn a single shell > on /dev/console, and not care about VTs or multiple gettys on VTs > -- > > Suboptimal but a small price to pay I suppose. > > > -serge > > Regards, > Mike -- Michael H. Warfield (AI4NB) | (770) 985-6132 | m...@wittsend.com /\/\|=mhw=|\/\/ | (678) 463-0932 | http://www.wittsend.com/mhw/ NIC whois: MHW9 | An optimist believes we live in the best of all PGP Key: 0x674627FF | possible worlds. A pessimist is sure of it!
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