Public bug reported: quantal lxc 0.8.0~rc1-4ubuntu39 kernel 3.5.0-21-generic using lvm on the host
I came back from holidays and found this problem. Not sure if it's related to a recent update of the system, I was updating it regularly in the past 3 weeks I was away but I haven't tried any LXC creation during that time, until today. If I create a container with the following command: lxc-create -n precise-test -t ubuntu -- -b andreas -r precise Then start it and login, the device for / is incorrect: andreas@precise-test:~$ mount /dev/mapper/vg0-var on / type ext4 (rw) That device does not exist: andreas@precise-test:~$ ls -la /dev/mapper ls: cannot access /dev/mapper: No such file or directory andreas@precise-test:~$ It's in fact my external device for the /var mount point. On the host: root@nsn7:~# mount|grep /var /dev/mapper/vg0-var on /var type ext4 (rw) /dev/mapper/vg0-postgresql on /var/lib/postgresql type ext4 (rw) /dev/mapper/vg0-virt on /var/lib/libvirt/images type ext4 (rw) If I create the container with this command, however: lxc-create -n precise-test -t ubuntu -B lvm --vgname vg0 --lvname lxc-precise-test -- -b andreas -r precise Then it works: andreas@precise-test:~$ mount /dev/dm-16 on / type ext4 (rw) The consequence I saw so far is that installing or updating or installing grub-pc inside the container breaks, because it can't find the device where the root filesystem is mounted from: 2013-01-07 16:15:07,835 unit:mysql/1: hook.output INFO: Setting up grub-pc (1.99-21ubuntu3.7) ... 2013-01-07 16:15:08,293 unit:mysql/1: hook.output INFO: /usr/sbin/grub- probe: error: cannot find a device for / (is /dev mounted?). 2013-01-07 16:15:08,500 unit:mysql/1: hook.output INFO: dpkg: error processing grub-pc (--configure): subprocess installed post-installation script returned error exit status 1 (example above from a juju deploy command) The default precise container does not have grub-pc installed, so something else must be pulling it in (maybe the mysql charm from my example). ** Affects: lxc (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to lxc in Ubuntu. https://bugs.launchpad.net/bugs/1096984 Title: Wrong device for the / mount point To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1096984/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs