** Also affects: libvirt (Ubuntu Lucid) Importance: Undecided Status: New
** Also affects: libvirt (Ubuntu Maverick) Importance: Undecided Status: New ** Also affects: libvirt (Ubuntu Natty) Importance: Undecided Status: New ** Also affects: libvirt (Ubuntu Oneiric) Importance: Undecided Status: New ** Description changed: lxcControllerRun() is calling virFileOpenTtyAt() with a slave opened on /the/container/chroot/dev/pts. While it is not documented in the manpages, glibc's grantpt does a first check (ensuring that the passed in fd is a pty slave) with '/dev/pts' as the hardcoded path, appending the pty#. lxcControllerRun always calls this on the first slave opened after creating the new /dev/pts, so grantpt is always checking /dev/pts/0. Therefore, if your host does not have /dev/pts/0 (easy to reproduce using screen), then grantpt will fail, and the container creation will subsequently also fail. + + ================================================================= + SRU Justification: + + 1. Impact: libvirt will be unable to create lxc containers, saying that it cannot allocate /dev/pts/0 + 2. Development fix: A patch was sent upstream which makes libvirt-lxc not use glibc's grantpt, which is the cause of the bug. + 3. Stable fix: same as the development fix. + 4. Test case: + 0. [ Set up libvirt and create a libvirt-lxc container ] + 1. make sure noone is logged into the server + 2. log in, make sure your tty is /dev/pts/0 (check with 'tty') + 3. Pin /dev/pts/0 by doing "sleep 2h & disown; exit" + 4. Try to start a container on that system. Without this fix it will fail with an error about /dev/pts/0. + 5. Regression potential: if the patch was bad, it could cause failures when starting a container, or other places when libvirt allocates a tty. + ================================================================= -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to libvirt in Ubuntu. https://bugs.launchpad.net/bugs/863629 Title: libvirt-lxc: virFileOpenTtyAt can't be called on /some/other/dev/pts To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/863629/+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