[lxc-devel] Clone fails to start with overlayfslxc.mount.entry error

[David Richardson]

Hello all,

Thanks for taking the time to read my question.  I've got a clone from a
snapshot of an Ubuntu-14.04 container using overlayfs that is failing to
start with the following debug output:

lxc-start 1406079665.382 INFO     lxc_start_ui - using rcfile
/opt/lxctesting/containers/clone1/config
lxc-start 1406079665.383 WARN     lxc_log - lxc_log_init called with log
already initialized
lxc-start 1406079665.393 INFO     lxc_lsm - LSM security driver AppArmor
lxc-start 1406079665.394 DEBUG    lxc_conf - allocated pty '/dev/pts/4'
(5/6)
lxc-start 1406079665.395 DEBUG    lxc_conf - allocated pty '/dev/pts/5'
(7/8)
lxc-start 1406079665.395 DEBUG    lxc_conf - allocated pty '/dev/pts/6'
(9/10)
lxc-start 1406079665.395 DEBUG    lxc_conf - allocated pty '/dev/pts/7'
(11/12)
lxc-start 1406079665.395 INFO     lxc_conf - tty's configured
lxc-start 1406079665.395 DEBUG    lxc_start - sigchild handler set
lxc-start 1406079665.395 DEBUG    lxc_console - no console peer
lxc-start 1406079665.395 INFO     lxc_start - 'clone1' is initialized
lxc-start 1406079665.404 INFO     lxc_monitor - using monitor sock name
lxc/23662a6af992221f//opt/lxctesting/containers
lxc-start 1406079665.414 DEBUG    lxc_start - Not dropping cap_sys_boot or
watching utmp
lxc-start 1406079665.418 DEBUG    lxc_conf - instanciated veth
'vethH1FYV4/vethNPODRH', index is '14857'
lxc-start 1406079665.422 DEBUG    lxc_conf - instanciated veth
'veth6964V6/vethS29B9W', index is '14859'
lxc-start 1406079665.422 INFO     lxc_cgroup - cgroup driver cgmanager
initing for clone1
lxc-start 1406079665.431 INFO     lxc_cgmanager - cgroup limits have been
setup
lxc-start 1406079665.463 DEBUG    lxc_conf - move '(null)' to '26894'
lxc-start 1406079665.495 DEBUG    lxc_conf - move '(null)' to '26894'
lxc-start 1406079665.496 ERROR    lxc_conf - No such file or directory -
failed to get real path for 'overlayfslxc.mount.entry = proc proc proc
nodev,noexec,nosuid 0 0'
lxc-start 1406079665.496 ERROR    lxc_conf - failed to mount rootfs
lxc-start 1406079665.496 ERROR    lxc_conf - failed to setup rootfs for
'clone1'
lxc-start 1406079665.496 ERROR    lxc_conf - Error setting up rootfs mount
after spawn
lxc-start 1406079665.496 ERROR    lxc_start - failed to setup the container
lxc-start 1406079665.496 ERROR    lxc_sync - invalid sequence number 1.
expected 2
lxc-start 1406079665.497 WARN     lxc_conf - failed to remove interface
'(null)'
lxc-start 1406079665.497 WARN     lxc_conf - failed to remove interface
'(null)'
lxc-start 1406079665.542 ERROR    lxc_start - failed to spawn 'clone1'
lxc-start 1406079665.542 WARN     lxc_commands - command get_cgroup failed
to receive response
lxc-start 1406079670.547 ERROR    lxc_start_ui - The container failed to
start.
lxc-start 1406079670.548 ERROR    lxc_start_ui - To get more details, run
the container in foreground mode.
lxc-start 1406079670.548 ERROR    lxc_start_ui - Additional information can
be obtained by setting the --logfile and --log-priority options.

Anyone have any suggestions for what might be going wrong?  The host
machine is Ubuntu-14.04 (3.13.0-30-generic #55-Ubuntu SMP) running LXC
1.0.4.

Thanks!

~Dave
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