On Sat, Jan 24, 2015 at 02:14:15PM -0500, S.Çağlar Onur wrote: > Hey Stéphane, > > On Fri, Jan 23, 2015 at 1:47 PM, Stéphane Graber <[email protected]> wrote: > > On Fri, Jan 23, 2015 at 06:19:46PM +0000, Serge Hallyn wrote: > >> Quoting Mathias Gibbens ([email protected]): > >> > On Fri, 2015-01-23 at 00:48 +0000, Mathias Gibbens wrote: > >> > > Hello, > >> > > > >> > > I've been testing LXC 1.1-rc1 on a Debian jessie system. > >> > > Specifically, > >> > > since all the pieces are now in place to support systemd in > >> > > unprivileged > >> > > containers, I've been testing running Debian jessie within an > >> > > unprivileged container. > >> > > > >> > > The jessie container successfully starts (there are some errors along > >> > > the way, but that's another issue), and I can do a `lxc-attach`, add a > >> > > user and log in. However, if I run `top` within the container I only > >> > > get > >> > > two lines of output: > >> > > > >> > > top - 00:13:25 up 4 min, 0 users, load average: 0.01, 0.05, 0.05 > >> > > Tasks: 10 total, 1 running, 9 sleeping, 0 stopped, 0 zombie > >> > > > >> > > Furthermore, the host system breaks spectacularly: > >> > > > >> > > lxc@lxc:~$ top > >> > > Error, do this: mount -t proc proc /proc > >> > > lxc@lxc:~$ /sbin/ifconfig > >> > > Warning: cannot open /proc/net/dev (No such file or directory). Limited > >> > > output. > >> > > lxc@lxc:~$ mount > >> > > mount: failed to read mtab: No such file or directory > >> > > lxc@lxc:~$ df > >> > > df: cannot read table of mounted file systems: No such file or > >> > > directory > >> > > lxc@lxc:~$ sudo reboot > >> > > Running in chroot, ignoring request. > >> > > > >> > > It seems that /proc is being unmounted somehow on the host. I can > >> > > re-mount /proc on the host, and things seem to work again. (I haven't > >> > > tested too much after re-mounting, instead opting to just reboot the > >> > > host back to a known good state.) > >> > > > >> > > Any idea what is causing this to happen? I have also tried running > >> > > Ubuntu Vivid as an unprivileged container and see the same results. I > >> > > have not yet tried a different Linux distro for the host system. > >> > > > >> > > Host system details: Debian jessie with kernel 3.16.7-ckt2-1 x86_64, > >> > > systemd-215, LXC-1.1-rc1 and lxcfs built from current git checkout, > >> > > cgmanager-0.35 as packaged from the sid repository. > >> > > > >> > > Thanks for any ideas, > >> > > Mathias > >> > > >> > This morning I setup a host running Ubuntu Vivid with cgmanager, lxc, > >> > and lxcfs packages installed from the daily PPA. I setup two > >> > >> But did you install the systemd-sysv package? > >> > >> > unprivileged containers, Debian jessie and Ubuntu Vivid, and ran `top` > >> > within each one. On the Vivid host, `top` runs properly and the host > >> > system does not break. > >> > > >> > So, it seems that the breakage is due to running jessie on the host > >> > system. Any ideas why this is happening, or where I could begin looking > >> > to debug this problem? > >> > >> No, I've just reproduced it, but it requires systemd to do so. > >> > >> Note that you'll have to manually chown your name=systemd cgroup > >> to your user for the lxc-start to succeed. > > > > > > Hey, > > > > So we've just tracked down that bug and it's a critical flaw in lxcfs > > which we've now fixed upstream. I tagged LXCFS 0.4 with the fix and am > > publishing it now on our website and uploading it to Ubuntu. > > https://launchpad.net/~ubuntu-lxc/+archive/ubuntu/daily still shows > the old lxcfs version. Should I be tracking some other repo?
Oops, no. I uploaded to vivid but forgot to refresh the PPA. Doing that now. > > > Thanks for reporting this! > > > > -- > > Stéphane Graber > > Ubuntu developer > > http://www.ubuntu.com > > > > _______________________________________________ > > lxc-devel mailing list > > [email protected] > > http://lists.linuxcontainers.org/listinfo/lxc-devel > > > > -- > S.Çağlar Onur <[email protected]> > _______________________________________________ > lxc-devel mailing list > [email protected] > http://lists.linuxcontainers.org/listinfo/lxc-devel -- Stéphane Graber Ubuntu developer http://www.ubuntu.com
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