I think this is just pure operator error. I noticed my config file was 0ed at some point, and I think this is because I missed a '-f' when specifying lxc-create. It now seems to be much happier (!)
Thanks for the pointers though. On Sat, Apr 3, 2010 at 5:10 PM, Gordon Henderson <gor...@drogon.net> wrote: > On Sat, 3 Apr 2010, Nigel Magnay wrote: > >>>> I'm seeing things like >>>> >>>> root <at> nirima-host:/home/magnayn# lxc-start -n ubuntu >>>> swapon: /dev/disk/by-uuid/35b40dbb-337c-4f46-a82f-642d6fbf3faa: swapon >>>> failed: Device or resource busy >>>> >>> OK - I'm relatively new to LXC (couple of months), I also use Debian not >>> Ubuntu, but to me, it looks like your container is executing a whole bunch >>> of init-scripts that it shouldn't be executing. (or really doesn't need >>> to) >>> >>> In my containers, I just have /etc/init.d/rcS with nothing more than a >>> line to create a default route (as the network is already created with >>> lxc-start). The line >>> >>> exec /etc/init.d/rc S >>> >>> is commented out. That's the ones in Debian that'll normally do stuff with >>> hardware like activate swap, fsck, etc. >>> >> >> Hm - I've tried rebooting the machine, which didn't help. Note that >> this image *used* to work; something has >> gotten corrupted somewhere, possibly when it was non-gracefully shutdown. >> >> I'm a bit confused; >> /dev/disk/by-uuid/35b40dbb-337c-4f46-a82f-642d6fbf3faa is swap in the >> outer machine, not the >> image itself. Why is lxc-start trying to turn on the swapfile (when >> it's already on) ? >> >> Either way, it's probably a red-herring; I can get past that but it >> still freezes.. > > I'm not sure it should see that though - make sure your init scripts are > not trying to swapon, or fsck, etc. and make sure it's not in your > /etc/fstab. > > Same for other things - really, in a container all I'm running is syslogd, > sshd, apache and then either mysql or asterisk depending on it's use... > > No NTP, hwmonitoring, mdadm, snmp, etc. as that's all being done on the > host. (actually there may be a case for snmp if you're remotely checking > the network stats) > >>>> Also - lxc looks exactly what I want to isolate some app servers into >>>> individual units. Is lxc considered reasonably stable (as it's >>>> mainline now), or should I steer clear for a bit ? >>> >>> I've jumped in at the deep end - did a lot of local testing myself >>> including running 50 containers on an old server, starting/stopping, >>> running applications, etc. each running a standard LAMPy type thing - and >>> Asterisk... And was happy enough with it to start to migrate a lot of >>> remote hosted servers over to it, and have decided to build all my server >>> from now on with containers in-mind. >> >> Good to know; I'm just slightly nervous as these initial tests have >> broken an image that was working, so I'd like to know >> why before I get a problem if I run it live.. > > I had a lot of "breakages" when starting out too - but once I culled all > the init scripts everything went much smoother. Also watch out for the > shutdown scripts too - so that if you shotdown a container (from inside > the container with shutdown/reboot/init 0) then it doesn't try to unmount, > or shutdown mdadm devices, etc. which may affect the host. > > I'm not sure an LXC container is secure enough at present to allow root > access to someone you don't trust, but I guess with proper use of limiting > the underlying hardware the container can access it might be... > > I'm using it as a management tool to better maintain a small raft of > servers that I operate. > > Gordon > > ------------------------------------------------------------------------------ > Download Intel® Parallel Studio Eval > Try the new software tools for yourself. Speed compiling, find bugs > proactively, and fine-tune applications for parallel performance. > See why Intel Parallel Studio got high marks during beta. > http://p.sf.net/sfu/intel-sw-dev > _______________________________________________ > Lxc-users mailing list > Lxc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/lxc-users > ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ Lxc-users mailing list Lxc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/lxc-users
