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. _______________________________________________ lxc-devel mailing list [email protected] http://lists.linuxcontainers.org/listinfo/lxc-devel
