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I have 3 lxc containers. They were all working fine on 12.10 and I upgraded the containers with do-release-upgrade on the containers to 13.04 and 13.10 and that worked great. Then I upgraded the host to 13.04 and then 13.10 and now the 3 containers hang with this:

Update: Everything I've said is still true but lxc-ls shows the containers as running so they are running they are just stuck somewhere while trying to start up. The /var/log/syslog, kern.log and auth.log don't get updated but wtmp and upstart do. Some files in the /var/log/upstart directory have errors but not sure which one really matters. Ah-ha!

    >lxc-start -n as1 -l DEBUG -o $(tty)
      lxc-start 1383145786.513 INFO     lxc_start_ui - using rcfile /var/lib/lxc/as1/config
      lxc-start 1383145786.513 WARN     lxc_log - lxc_log_init called with log already initialized
      lxc-start 1383145786.513 INFO     lxc_apparmor - aa_enabled set to 1

      lxc-start 1383145786.514 DEBUG    lxc_conf - allocated pty '/dev/pts/2' (5/6)
      lxc-start 1383145786.514 DEBUG    lxc_conf - allocated pty '/dev/pts/13' (7/8)
      lxc-start 1383145786.514 DEBUG    lxc_conf - allocated pty '/dev/pts/14' (9/10)
      lxc-start 1383145786.514 DEBUG    lxc_conf - allocated pty '/dev/pts/15' (11/12)
      lxc-start 1383145786.514 DEBUG    lxc_conf - allocated pty '/dev/pts/17' (13/14)
      lxc-start 1383145786.514 DEBUG    lxc_conf - allocated pty '/dev/pts/18' (15/16)
      lxc-start 1383145786.514 DEBUG    lxc_conf - allocated pty '/dev/pts/19' (17/18)
      lxc-start 1383145786.514 DEBUG    lxc_conf - allocated pty '/dev/pts/20' (19/20)
      lxc-start 1383145786.514 INFO     lxc_conf - tty's configured
      lxc-start 1383145786.514 DEBUG    lxc_start - sigchild handler set
      lxc-start 1383145786.514 DEBUG    lxc_console - opening /dev/tty for console peer
      lxc-start 1383145786.514 DEBUG    lxc_console - using '/dev/tty' as console
      lxc-start 1383145786.514 DEBUG    lxc_console - 6242 got SIGWINCH fd 25
      lxc-start 1383145786.514 DEBUG    lxc_console - set winsz dstfd:22 cols:177 rows:53
      lxc-start 1383145786.514 INFO     lxc_start - 'as1' is initialized
      lxc-start 1383145786.522 DEBUG    lxc_start - Not dropping cap_sys_boot or watching utmp

      lxc-start 1383145786.524 DEBUG    lxc_conf - mac address of host interface 'vethB4L35W' changed to private fe:7c:96:a0:ae:29
      lxc-start 1383145786.525 DEBUG    lxc_conf - instanciated veth 'vethB4L35W/vethVC61K2', index is '26'
      lxc-start 1383145786.529 DEBUG    lxc_cgroup - cgroup 'memory.limit_in_bytes' set to '20G'
      lxc-start 1383145786.529 DEBUG    lxc_cgroup - cgroup 'cpuset.cpus' set to '12-23'
      lxc-start 1383145786.529 INFO     lxc_cgroup - cgroup has been setup
      lxc-start 1383145786.555 DEBUG    lxc_conf - move 'eth0' to '6249'
      lxc-start 1383145786.555 INFO     lxc_conf - 'as1' hostname has been setup
      lxc-start 1383145786.575 DEBUG    lxc_conf - 'eth0' has been setup
      lxc-start 1383145786.575 INFO     lxc_conf - network has been setup
      lxc-start 1383145786.575 INFO     lxc_conf - looking at .44 42 252:0 / / rw,relatime - ext4 /dev/mapper/limitorderbook1-root rw,errors=remount-ro,data=ordered
.
      lxc-start 1383145786.575 INFO     lxc_conf - now p is . /.
      lxc-start 1383145786.575 INFO     lxc_conf - looking at .52 44 0:5 / /dev rw,relatime - devtmpfs udev rw,size=32961632k,nr_inodes=8240408,mode=755
.
      lxc-start 1383145786.575 INFO     lxc_conf - now p is . /dev.
      lxc-start 1383145786.575 INFO     lxc_conf - looking at .61 52 0:11 / /dev/pts rw,nosuid,noexec,relatime - devpts devpts rw,mode=600,ptmxmode=000
.
      lxc-start 1383145786.575 INFO     lxc_conf - now p is . /dev/pts.
      lxc-start 1383145786.575 INFO     lxc_conf - looking at .68 44 0:15 / /run rw,nosuid,noexec,relatime - tmpfs tmpfs rw,size=6594456k,mode=755
.
      lxc-start 1383145786.575 INFO     lxc_conf - now p is . /run.
      lxc-start 1383145786.575 INFO     lxc_conf - looking at .69 68 0:18 / /run/lock rw,nosuid,nodev,noexec,relatime - tmpfs none rw,size=5120k
.
      lxc-start 1383145786.575 INFO     lxc_conf - now p is . /run/lock.
      lxc-start 1383145786.575 INFO     lxc_conf - looking at .72 68 0:19 / /run/shm rw,nosuid,nodev,relatime - tmpfs none rw
.
      lxc-start 1383145786.575 INFO     lxc_conf - now p is . /run/shm.
      lxc-start 1383145786.575 INFO     lxc_conf - looking at .73 68 0:21 / /run/user rw,nosuid,nodev,noexec,relatime - tmpfs none rw,size=102400k,mode=755
.
      lxc-start 1383145786.575 INFO     lxc_conf - now p is . /run/user.
      lxc-start 1383145786.575 INFO     lxc_conf - looking at .76 44 0:14 / /sys rw,nosuid,nodev,noexec,relatime - sysfs sysfs rw
.
      lxc-start 1383145786.575 INFO     lxc_conf - now p is . /sys.
      lxc-start 1383145786.575 INFO     lxc_conf - looking at .77 76 0:16 / /sys/fs/cgroup rw,relatime - tmpfs none rw,size=4k,mode=755
.
      lxc-start 1383145786.575 INFO     lxc_conf - now p is . /sys/fs/cgroup.
      lxc-start 1383145786.575 INFO     lxc_conf - looking at .78 77 0:20 / /sys/fs/cgroup/cpuset rw,relatime - cgroup cgroup rw,cpuset,clone_children
.
      lxc-start 1383145786.575 INFO     lxc_conf - now p is . /sys/fs/cgroup/cpuset.
      lxc-start 1383145786.575 INFO     lxc_conf - looking at .79 77 0:23 / /sys/fs/cgroup/cpu rw,relatime - cgroup cgroup rw,cpu
.
      lxc-start 1383145786.575 INFO     lxc_conf - now p is . /sys/fs/cgroup/cpu.
      lxc-start 1383145786.575 INFO     lxc_conf - looking at .80 77 0:24 / /sys/fs/cgroup/cpuacct rw,relatime - cgroup cgroup rw,cpuacct
.
      lxc-start 1383145786.575 INFO     lxc_conf - now p is . /sys/fs/cgroup/cpuacct.
      lxc-start 1383145786.575 INFO     lxc_conf - looking at .81 77 0:25 / /sys/fs/cgroup/memory rw,relatime - cgroup cgroup rw,memory
.
      lxc-start 1383145786.575 INFO     lxc_conf - now p is . /sys/fs/cgroup/memory.
      lxc-start 1383145786.575 INFO     lxc_conf - looking at .82 77 0:26 / /sys/fs/cgroup/devices rw,relatime - cgroup cgroup rw,devices
.
      lxc-start 1383145786.575 INFO     lxc_conf - now p is . /sys/fs/cgroup/devices.
      lxc-start 1383145786.575 INFO     lxc_conf - looking at .83 77 0:27 / /sys/fs/cgroup/freezer rw,relatime - cgroup cgroup rw,freezer
.
      lxc-start 1383145786.575 INFO     lxc_conf - now p is . /sys/fs/cgroup/freezer.
      lxc-start 1383145786.575 INFO     lxc_conf - looking at .84 77 0:28 / /sys/fs/cgroup/blkio rw,relatime - cgroup cgroup rw,blkio
.
      lxc-start 1383145786.575 INFO     lxc_conf - now p is . /sys/fs/cgroup/blkio.
      lxc-start 1383145786.575 INFO     lxc_conf - looking at .85 77 0:29 / /sys/fs/cgroup/perf_event rw,relatime - cgroup cgroup rw,perf_event
.
      lxc-start 1383145786.575 INFO     lxc_conf - now p is . /sys/fs/cgroup/perf_event.
      lxc-start 1383145786.575 INFO     lxc_conf - looking at .94 77 0:30 / /sys/fs/cgroup/hugetlb rw,relatime - cgroup cgroup rw,hugetlb
.
      lxc-start 1383145786.575 INFO     lxc_conf - now p is . /sys/fs/cgroup/hugetlb.
      lxc-start 1383145786.575 INFO     lxc_conf - looking at .95 77 0:31 / /sys/fs/cgroup/systemd rw,nosuid,nodev,noexec,relatime - cgroup systemd rw,name=systemd
.
      lxc-start 1383145786.575 INFO     lxc_conf - now p is . /sys/fs/cgroup/systemd.
      lxc-start 1383145786.575 INFO     lxc_conf - looking at .96 76 0:17 / /sys/fs/fuse/connections rw,relatime - fusectl none rw
.
      lxc-start 1383145786.575 INFO     lxc_conf - now p is . /sys/fs/fuse/connections.
      lxc-start 1383145786.575 INFO     lxc_conf - looking at .98 76 0:6 / /sys/kernel/debug rw,relatime - debugfs none rw
.
      lxc-start 1383145786.575 INFO     lxc_conf - now p is . /sys/kernel/debug.
      lxc-start 1383145786.575 INFO     lxc_conf - looking at .101 76 0:10 / /sys/kernel/security rw,relatime - securityfs none rw
.
      lxc-start 1383145786.575 INFO     lxc_conf - now p is . /sys/kernel/security.
      lxc-start 1383145786.575 INFO     lxc_conf - looking at .102 76 0:22 / /sys/fs/pstore rw,relatime - pstore none rw
.
      lxc-start 1383145786.575 INFO     lxc_conf - now p is . /sys/fs/pstore.
      lxc-start 1383145786.575 INFO     lxc_conf - looking at .103 44 0:3 / /proc rw,nosuid,nodev,noexec,relatime - proc proc rw
.
      lxc-start 1383145786.575 INFO     lxc_conf - now p is . /proc.
      lxc-start 1383145786.575 INFO     lxc_conf - looking at .104 44 9:2 / /data rw,relatime - ext4 /dev/md2 rw,errors=remount-ro,data=ordered
.
      lxc-start 1383145786.575 INFO     lxc_conf - now p is . /data.
      lxc-start 1383145786.575 INFO     lxc_conf - looking at .105 44 8:1 / /boot rw,relatime - ext2 /dev/sda1 rw,errors=continue
.
      lxc-start 1383145786.575 INFO     lxc_conf - now p is . /boot.
      lxc-start 1383145786.576 DEBUG    lxc_conf - mounted '/data/srv/lxc/as1' on '/usr/lib/x86_64-linux-gnu/lxc'
      lxc-start 1383145786.576 DEBUG    lxc_conf - mounted 'none' on '/usr/lib/x86_64-linux-gnu/lxc//dev/pts', type 'devpts'
      lxc-start 1383145786.576 DEBUG    lxc_conf - mounted 'none' on '/usr/lib/x86_64-linux-gnu/lxc//proc', type 'proc'
      lxc-start 1383145786.576 DEBUG    lxc_conf - mounted 'none' on '/usr/lib/x86_64-linux-gnu/lxc//sys', type 'sysfs'
      lxc-start 1383145786.576 DEBUG    lxc_conf - mounted 'none' on '/usr/lib/x86_64-linux-gnu/lxc//run', type 'tmpfs'
      lxc-start 1383145786.576 INFO     lxc_conf - mount points have been setup
      lxc-start 1383145786.577 INFO     lxc_conf - console has been setup
      lxc-start 1383145786.577 INFO     lxc_conf - 8 tty(s) has been setup
      lxc-start 1383145786.577 INFO     lxc_conf - rootfs path is ./data/srv/lxc/as1., mount is ./usr/lib/x86_64-linux-gnu/lxc.
      lxc-start 1383145786.577 INFO     lxc_apparmor - I am 1, /proc/self points to 1

      lxc-start 1383145786.577 DEBUG    lxc_conf - created '/usr/lib/x86_64-linux-gnu/lxc/lxc_putold' directory
      lxc-start 1383145786.577 DEBUG    lxc_conf - mountpoint for old rootfs is '/usr/lib/x86_64-linux-gnu/lxc/lxc_putold'
      lxc-start 1383145786.577 DEBUG    lxc_conf - pivot_root syscall to '/usr/lib/x86_64-linux-gnu/lxc' successful
      lxc-start 1383145786.577 DEBUG    lxc_conf - umounted '/lxc_putold/dev/pts'
      lxc-start 1383145786.577 DEBUG    lxc_conf - umounted '/lxc_putold/run/lock'
      lxc-start 1383145786.577 DEBUG    lxc_conf - umounted '/lxc_putold/run/shm'
      lxc-start 1383145786.577 DEBUG    lxc_conf - umounted '/lxc_putold/run/user'
      lxc-start 1383145786.577 DEBUG    lxc_conf - umounted '/lxc_putold/sys/fs/cgroup/cpuset'
      lxc-start 1383145786.577 DEBUG    lxc_conf - umounted '/lxc_putold/sys/fs/cgroup/cpu'
      lxc-start 1383145786.577 DEBUG    lxc_conf - umounted '/lxc_putold/sys/fs/cgroup/cpuacct'
      lxc-start 1383145786.577 DEBUG    lxc_conf - umounted '/lxc_putold/sys/fs/cgroup/memory'
      lxc-start 1383145786.577 DEBUG    lxc_conf - umounted '/lxc_putold/sys/fs/cgroup/devices'
      lxc-start 1383145786.577 DEBUG    lxc_conf - umounted '/lxc_putold/sys/fs/cgroup/freezer'
      lxc-start 1383145786.577 DEBUG    lxc_conf - umounted '/lxc_putold/sys/fs/cgroup/blkio'
      lxc-start 1383145786.577 DEBUG    lxc_conf - umounted '/lxc_putold/sys/fs/cgroup/perf_event'
      lxc-start 1383145786.577 DEBUG    lxc_conf - umounted '/lxc_putold/sys/fs/cgroup/hugetlb'
      lxc-start 1383145786.577 DEBUG    lxc_conf - umounted '/lxc_putold/sys/fs/cgroup/systemd'
      lxc-start 1383145786.577 DEBUG    lxc_conf - umounted '/lxc_putold/sys/fs/fuse/connections'
      lxc-start 1383145786.577 DEBUG    lxc_conf - umounted '/lxc_putold/sys/kernel/debug'
      lxc-start 1383145786.577 DEBUG    lxc_conf - umounted '/lxc_putold/sys/kernel/security'
      lxc-start 1383145786.577 DEBUG    lxc_conf - umounted '/lxc_putold/sys/fs/pstore'
      lxc-start 1383145786.577 DEBUG    lxc_conf - umounted '/lxc_putold/proc'
      lxc-start 1383145786.577 DEBUG    lxc_conf - umounted '/lxc_putold/data'
      lxc-start 1383145786.577 DEBUG    lxc_conf - umounted '/lxc_putold/boot'
      lxc-start 1383145786.577 DEBUG    lxc_conf - umounted '/lxc_putold/dev'
      lxc-start 1383145786.577 DEBUG    lxc_conf - umounted '/lxc_putold/run'
      lxc-start 1383145786.577 DEBUG    lxc_conf - umounted '/lxc_putold/sys/fs/cgroup'
      lxc-start 1383145786.577 DEBUG    lxc_conf - umounted '/lxc_putold/sys'
      lxc-start 1383145786.577 DEBUG    lxc_conf - umounted '/lxc_putold'
      lxc-start 1383145786.577 INFO     lxc_conf - created new pts instance
      lxc-start 1383145786.578 DEBUG    lxc_conf - drop capability 'sys_boot' (22)
      lxc-start 1383145786.578 DEBUG    lxc_conf - capabilities have been setup
      lxc-start 1383145786.578 NOTICE   lxc_conf - 'as1' is setup.
      lxc-start 1383145786.578 DEBUG    lxc_cgroup - cgroup 'memory.limit_in_bytes' set to '20G'
      lxc-start 1383145786.578 DEBUG    lxc_cgroup - cgroup 'cpuset.cpus' set to '12-23'
      lxc-start 1383145786.578 INFO     lxc_cgroup - cgroup has been setup
      lxc-start 1383145786.578 INFO     lxc_apparmor - setting up apparmor
      lxc-start 1383145786.578 INFO     lxc_apparmor - changed apparmor profile to lxc-container-default
      lxc-start 1383145786.578 NOTICE   lxc_start - exec'ing '/sbin/init'
      lxc-start 1383145786.578 INFO     lxc_conf - looking at .15 20 0:14 / /sys rw,nosuid,nodev,noexec,relatime - sysfs sysfs rw
.
      lxc-start 1383145786.578 INFO     lxc_conf - now p is . /sys.
      lxc-start 1383145786.578 INFO     lxc_conf - looking at .16 20 0:3 / /proc rw,nosuid,nodev,noexec,relatime - proc proc rw
.
      lxc-start 1383145786.578 INFO     lxc_conf - now p is . /proc.
      lxc-start 1383145786.578 INFO     lxc_conf - looking at .17 20 0:5 / /dev rw,relatime - devtmpfs udev rw,size=32961632k,nr_inodes=8240408,mode=755
.
      lxc-start 1383145786.578 INFO     lxc_conf - now p is . /dev.
      lxc-start 1383145786.578 INFO     lxc_conf - looking at .18 17 0:11 / /dev/pts rw,nosuid,noexec,relatime - devpts devpts rw,mode=600,ptmxmode=000
.
      lxc-start 1383145786.578 INFO     lxc_conf - now p is . /dev/pts.
      lxc-start 1383145786.578 INFO     lxc_conf - looking at .19 20 0:15 / /run rw,nosuid,noexec,relatime - tmpfs tmpfs rw,size=6594456k,mode=755
.
      lxc-start 1383145786.578 INFO     lxc_conf - now p is . /run.
      lxc-start 1383145786.578 INFO     lxc_conf - looking at .20 1 252:0 / / rw,relatime - ext4 /dev/mapper/limitorderbook1-root rw,errors=remount-ro,data=ordered
.
      lxc-start 1383145786.578 INFO     lxc_conf - now p is . /.
      lxc-start 1383145786.578 INFO     lxc_conf - looking at .22 15 0:16 / /sys/fs/cgroup rw,relatime - tmpfs none rw,size=4k,mode=755
.
      lxc-start 1383145786.578 INFO     lxc_conf - now p is . /sys/fs/cgroup.
      lxc-start 1383145786.578 INFO     lxc_conf - looking at .23 15 0:17 / /sys/fs/fuse/connections rw,relatime - fusectl none rw
.
      lxc-start 1383145786.578 INFO     lxc_conf - now p is . /sys/fs/fuse/connections.
      lxc-start 1383145786.578 INFO     lxc_conf - looking at .24 15 0:6 / /sys/kernel/debug rw,relatime - debugfs none rw
.
      lxc-start 1383145786.579 INFO     lxc_conf - now p is . /sys/kernel/debug.
      lxc-start 1383145786.579 INFO     lxc_conf - looking at .25 15 0:10 / /sys/kernel/security rw,relatime - securityfs none rw
.
      lxc-start 1383145786.579 INFO     lxc_conf - now p is . /sys/kernel/security.
      lxc-start 1383145786.579 INFO     lxc_conf - looking at .26 19 0:18 / /run/lock rw,nosuid,nodev,noexec,relatime - tmpfs none rw,size=5120k
.
      lxc-start 1383145786.579 INFO     lxc_conf - now p is . /run/lock.
      lxc-start 1383145786.579 INFO     lxc_conf - looking at .27 19 0:19 / /run/shm rw,nosuid,nodev,relatime - tmpfs none rw
.
      lxc-start 1383145786.579 INFO     lxc_conf - now p is . /run/shm.
      lxc-start 1383145786.579 INFO     lxc_conf - looking at .28 22 0:20 / /sys/fs/cgroup/cpuset rw,relatime - cgroup cgroup rw,cpuset,clone_children
.
      lxc-start 1383145786.579 INFO     lxc_conf - now p is . /sys/fs/cgroup/cpuset.
      lxc-start 1383145786.579 INFO     lxc_conf - looking at .29 19 0:21 / /run/user rw,nosuid,nodev,noexec,relatime - tmpfs none rw,size=102400k,mode=755
.
      lxc-start 1383145786.579 INFO     lxc_conf - now p is . /run/user.
      lxc-start 1383145786.579 INFO     lxc_conf - looking at .30 15 0:22 / /sys/fs/pstore rw,relatime - pstore none rw
.
      lxc-start 1383145786.579 INFO     lxc_conf - now p is . /sys/fs/pstore.
      lxc-start 1383145786.579 INFO     lxc_conf - looking at .31 22 0:23 / /sys/fs/cgroup/cpu rw,relatime - cgroup cgroup rw,cpu
.
      lxc-start 1383145786.579 INFO     lxc_conf - now p is . /sys/fs/cgroup/cpu.
      lxc-start 1383145786.579 INFO     lxc_conf - looking at .32 22 0:24 / /sys/fs/cgroup/cpuacct rw,relatime - cgroup cgroup rw,cpuacct
.
      lxc-start 1383145786.579 INFO     lxc_conf - now p is . /sys/fs/cgroup/cpuacct.
      lxc-start 1383145786.579 INFO     lxc_conf - looking at .33 22 0:25 / /sys/fs/cgroup/memory rw,relatime - cgroup cgroup rw,memory
.
      lxc-start 1383145786.579 INFO     lxc_conf - now p is . /sys/fs/cgroup/memory.
      lxc-start 1383145786.579 INFO     lxc_conf - looking at .34 22 0:26 / /sys/fs/cgroup/devices rw,relatime - cgroup cgroup rw,devices
.
      lxc-start 1383145786.579 INFO     lxc_conf - now p is . /sys/fs/cgroup/devices.
      lxc-start 1383145786.579 INFO     lxc_conf - looking at .35 22 0:27 / /sys/fs/cgroup/freezer rw,relatime - cgroup cgroup rw,freezer
.
      lxc-start 1383145786.579 INFO     lxc_conf - now p is . /sys/fs/cgroup/freezer.
      lxc-start 1383145786.579 INFO     lxc_conf - looking at .36 22 0:28 / /sys/fs/cgroup/blkio rw,relatime - cgroup cgroup rw,blkio
.
      lxc-start 1383145786.579 INFO     lxc_conf - now p is . /sys/fs/cgroup/blkio.
      lxc-start 1383145786.579 INFO     lxc_conf - looking at .37 22 0:29 / /sys/fs/cgroup/perf_event rw,relatime - cgroup cgroup rw,perf_event
.
      lxc-start 1383145786.579 INFO     lxc_conf - now p is . /sys/fs/cgroup/perf_event.
      lxc-start 1383145786.579 INFO     lxc_conf - looking at .38 22 0:30 / /sys/fs/cgroup/hugetlb rw,relatime - cgroup cgroup rw,hugetlb
.
      lxc-start 1383145786.579 INFO     lxc_conf - now p is . /sys/fs/cgroup/hugetlb.
      lxc-start 1383145786.579 INFO     lxc_conf - looking at .39 20 9:2 / /data rw,relatime - ext4 /dev/md2 rw,errors=remount-ro,data=ordered
.
      lxc-start 1383145786.579 INFO     lxc_conf - now p is . /data.
      lxc-start 1383145786.579 INFO     lxc_conf - looking at .40 20 8:1 / /boot rw,relatime - ext2 /dev/sda1 rw,errors=continue
.
      lxc-start 1383145786.579 INFO     lxc_conf - now p is . /boot.
      lxc-start 1383145786.579 INFO     lxc_conf - looking at .41 22 0:31 / /sys/fs/cgroup/systemd rw,nosuid,nodev,noexec,relatime - cgroup systemd rw,name=systemd
.
      lxc-start 1383145786.579 INFO     lxc_conf - now p is . /sys/fs/cgroup/systemd.
      lxc-start 1383145786.579 NOTICE   lxc_start - '/sbin/init' started with pid '6249'
      lxc-start 1383145786.579 WARN     lxc_start - invalid pid for SIGCHLD
<4>init: ureadahead main process (7) terminated with status 5
<4>init: console-font main process (94) terminated with status 1

And it will just sit there like that for hours at least. The container becomes pingable but I can't ssh and if I try lxc-console -n as1 I get a blank screen.

If I do lxc-stop -n as1 or ^C in the window where it has hung I get:

^CTERM environment variable not set.
<4>init: plymouth-upstart-bridge main process (192) terminated with status 1
<4>init: hwclock-save main process (187) terminated with status 70
 * Asking all remaining processes to terminate...
   ...done.
 * All processes ended within 1 seconds...
   ...done.
 * Deactivating swap...
   ...fail!
mount: cannot mount block device /dev/md2 read-only
 * Will now restart

But after 20 minutes it hasn't restarted. Any ideas why these containers are hanging?

share|improve this question
1  
I tried some basic commands with lxc containers in Ubuntu 13.10 on a clean 64-bit install, mainly using commands from the official documentation (help.ubuntu.com/13.10/serverguide/lxc.html). After creating about 5 containers, starting and stopping them a few times, etc., suddenly they started hanging, just as you describe above. I had to hard reboot the machine. –  William Stein Nov 5 '13 at 16:20

1 Answer 1

There are some new settings you need in fstab/config. Rather than paste them here, I'll put my general guide to fixing this problem when you upgrade lxc:

  1. Realize that LXC is broken in the new version, ugh
  2. Create a new container from a default template, using e.g. lxc-create -t ubuntu -n CN
  3. Run a diff between the new container's config and fstab files and modify your existing containers appropriately
  4. Cross your fingers and try again

This methodology worked for me after upgrading to 13.10.

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Yup the fstab changes are probably it since lxc gets upgraded from 0.7.5 in Precise to 1.0.0.alpha1 in Saucy. There are a few mount points that you need to specify explicitly which were being automatically mounted by lxc before. –  Chu Yeow Jan 25 at 7:16
    
Also, I had a similar problem. I have an Ubuntu 12.04 LXC host, with a single Ubutnu 14.04 container. After I have upgraded host kernel to 14.04 HWE (and then LXC from precise-backports), container stopped booting properly. Following @Jeff's advice I have created a new container, compared fstabs, copied additional mounts, container started to boot normally. –  thor Nov 17 at 7:25

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