[CRIU] Checkpoint/Restore LXC container with CRIU on a raspberry pi 2
Tycho Andersen
tycho.andersen at canonical.com
Tue Jun 14 08:33:47 PDT 2016
Hi Alex,
On Tue, Jun 14, 2016 at 05:11:57PM +0200, alex vk wrote:
> Hi Tycho,
>
> Unfortunately, looks like I don't have any tty.info in my checkpoint
> directory...
> Hard to give you the output then :)
Hmm. I don't understand how you can get this error message then. You
should be able to remove the lxc.console = none bit from your config
and try again (the liblxc and criu you're using support this).
Alternatively, if you want to try and debug this, could you try again
with a liblxc with this patch?
diff --git a/src/lxc/criu.c b/src/lxc/criu.c
index ce8ada6..298b9af 100644
--- a/src/lxc/criu.c
+++ b/src/lxc/criu.c
@@ -302,7 +302,7 @@ static void exec_criu(struct criu_opts *opts)
if (tty_info[0]) {
if (opts->console_fd < 0) {
- ERROR("lxc.console configured on source host but not target");
+ ERROR("lxc.console configured on source host but not target %s", tty_info);
goto err;
}
I'm not sure why you would have any tty_info at all if you don't have a tty.info file.
Tycho
> Thanks,
> Alex
>
> 2016-06-14 16:50 GMT+02:00 Tycho Andersen <tycho.andersen at canonical.com>:
>
> > Hi alex,
> >
> > On Thu, Jun 09, 2016 at 05:53:26PM +0200, alex vk wrote:
> > > Hi everyone,
> > >
> > > I'm now trying to checkpoint and restore an LXC container on a raspberry
> > PI
> > > 2. (Criu 2.0 is working fine with the kernel 3.18, and LXC 2.0 works as
> > > well on the RPI2)
> > > Checkpointing a container apparently succeeds after disabling seccomp and
> > > adding these lines to the container config (according to the wiki):
> > >
> > > lxc.seccomp =
> > > # hax for criu
> > > lxc.console = none
> > > lxc.tty = 0
> > > lxc.cgroup.devices.deny = c 5:1 rwm
> > >
> > > However restoring fails with this message : "lxc-checkpoint: criu.c:
> > > exec_criu: 305 lxc.console configured on source host but not target"
> >
> > Looks like you have tried a lot of stuff, let's sort out the liblxc
> > issue first.
> >
> > Can you post the output of `cat tty.info` in your checkpoint
> > directory?
> >
> > Thanks,
> >
> > Tycho
> >
> > > I'read on this post (
> > >
> > https://lists.linuxcontainers.org/pipermail/lxc-devel/2016-March/013856.html
> > )
> > > not to pass the --ext-mount-map option when console=none.
> > > In this case, I have another error : "1: Error (mount.c:3381): mnt: New
> > > root and old root are the same"
> > >
> > > Interestingly, I have another error when trying to restore, if i run all
> > > the container creation, start, dump and restore with sudo (not directly
> > in
> > > root):
> > >
> > > pie: 1: Error (pie/restorer.c:888): Can't restore ticks/time for timer>
> > > pie: 1: fd - 0
> > > pie: 1: Error (pie/restorer.c:1408): Can't restore timerfd -22
> > >
> > > I've put the full log of dumping and restoring, as well as the container
> > > config attached below, if anyone has any ideas ?
> > >
> > > Thanks for your help,
> > > Alex
> > >
> > >
> > >
> > ----------------------------------------------------------------------------------------------------
> > > Here is what i get from the restore :
> > >
> > > root at pi-desktop:/home/pi/checkpoint# lxc-checkpoint -r -D
> > > /home/pi/checkpoint/ -n test-container --logfile=debug_restore
> > > --logpriority=DEBUG
> > > lxc-checkpoint: criu.c: do_restore: 705 criu process exited 1, output:
> > > lxc-checkpoint: criu.c: exec_criu: 305 lxc.console configured on source
> > > host but not target
> > >
> > >
> > > lxc-checkpoint: cgfsng.c: recursive_destroy: 983 Error destroying
> > > /sys/fs/cgroup/systemd//lxc/test-container
> > > lxc-checkpoint: cgfsng.c: recursive_destroy: 983 Error destroying
> > > /sys/fs/cgroup/blkio//lxc/test-container
> > > lxc-checkpoint: cgfsng.c: recursive_destroy: 983 Error destroying
> > > /sys/fs/cgroup/freezer//lxc/test-container
> > > lxc-checkpoint: cgfsng.c: recursive_destroy: 983 Error destroying
> > > /sys/fs/cgroup/debug//lxc/test-container
> > > lxc-checkpoint: cgfsng.c: recursive_destroy: 983 Error destroying
> > > /sys/fs/cgroup/cpu//lxc/test-container
> > > lxc-checkpoint: cgfsng.c: recursive_destroy: 983 Error destroying
> > > /sys/fs/cgroup/devices//lxc/test-container
> > > lxc-checkpoint: cgfsng.c: recursive_destroy: 983 Error destroying
> > > /sys/fs/cgroup/perf_event//lxc/test-container
> > > lxc-checkpoint: cgfsng.c: recursive_destroy: 983 Error destroying
> > > /sys/fs/cgroup/cpuset//lxc/test-container
> > > lxc-checkpoint: cgfsng.c: recursive_destroy: 983 Error destroying
> > > /sys/fs/cgroup/net_cls//lxc/test-container
> > > lxc-checkpoint: criu.c: __criu_restore: 953 restore process died
> > > Restoring test-container failed.
> > >
> > >
> > ----------------------------------------------------------------------------------------------------
> > > Here is the log of the dumping created with the lxc-checkpoint -s
> > > --logfile=debug_dump :
> > > root at pi-desktop:/home/pi/checkpoint# lxc-checkpoint -s -D
> > > /home/pi/checkpoint/ -n test-container --logfile=debug_dump
> > > --logpriority=DEBUG
> > > root at pi-desktop:/home/pi/checkpoint# cat debug_dump
> > > lxc-checkpoint 20160609165234.776 WARN lxc_confile -
> > > confile.c:config_pivotdir:1879 - lxc.pivotdir is ignored. It will soon
> > > become an error.
> > > lxc-checkpoint 20160609165234.777 WARN lxc_confile -
> > > confile.c:config_personality:1117 - unsupported personality 'armhf'
> > > lxc-checkpoint 20160609165234.784 DEBUG lxc_commands -
> > > commands.c:lxc_cmd_get_state:579 - 'test-container' is in 'RUNNING' state
> > > lxc-checkpoint 20160609165234.799 INFO lxc_criu -
> > criu.c:exec_criu:387
> > > - execing: /usr/local/sbin/criu dump --tcp-established --file-locks
> > > --link-remap --manage-cgroups --ext-mount-map auto
> > > --enable-external-sharing --enable-external-masters --enable-fs hugetlbfs
> > > --enable-fs tracefs -D /home/pi/checkpoint/ -o
> > > /home/pi/checkpoint//dump.log -t 4617 --freeze-cgroup
> > > /sys/fs/cgroup/freezer///lxc/test-container --force-irmap
> > >
> > -------------------------------------------------------------------------------------------
> > >
> > > And here is the dump.log :
> > > root at pi-desktop:/home/pi/checkpoint# cat dump.log
> > > Warn (autofs.c:77): Failed to find pipe_ino option (old kernel?)
> > > Detected FS_EVENT_ON_CHILD bit in mask (will be ignored on restore)
> > > tar: ./systemd/journal/socket: socket ignored
> > > tar: ./systemd/journal/stdout: socket ignored
> > > tar: ./systemd/journal/syslog: socket ignored
> > > tar: ./systemd/journal/dev-log: socket ignored
> > > tar: ./systemd/private: socket ignored
> > > tar: ./systemd/notify: socket ignored
> > >
> > >
> > ----------------------------------------------------------------------------------------------------
> > >
> > > Here is the log created with lxc-checkpoint -r --logfile :
> > >
> > > root at pi-desktop:/home/pi/checkpoint# cat debug_restore
> > > lxc-checkpoint 20160609165308.055 WARN lxc_confile -
> > > confile.c:config_pivotdir:1879 - lxc.pivotdir is ignored. It will soon
> > > become an error.
> > > lxc-checkpoint 20160609165308.056 WARN lxc_confile -
> > > confile.c:config_personality:1117 - unsupported personality 'armhf'
> > > lxc-checkpoint 20160609165308.075 INFO lxc_lsm -
> > lsm/lsm.c:lsm_init:48
> > > - LSM security driver nop
> > > lxc-checkpoint 20160609165308.076 DEBUG lxc_start -
> > > start.c:setup_signal_fd:289 - sigchild handler set
> > > lxc-checkpoint 20160609165308.076 INFO lxc_start -
> > > start.c:lxc_init:488 - 'test-container' is initialized
> > > lxc-checkpoint 20160609165308.076 INFO lxc_cgroup -
> > > cgroup.c:cgroup_init:68 - cgroup driver cgroupfs-ng initing for
> > > test-container
> > > lxc-checkpoint 20160609165308.087 ERROR lxc_criu -
> > criu.c:exec_criu:305
> > > - lxc.console configured on source host but not target
> > > lxc-checkpoint 20160609165308.115 INFO lxc_conf -
> > > conf.c:run_script_argv:367 - Executing script
> > > '/usr/share/lxcfs/lxc.reboot.hook' for container 'test-container', config
> > > section 'lxc'
> > > lxc-checkpoint 20160609165308.686 ERROR lxc_criu -
> > > criu.c:do_restore:705 - criu process exited 1, output:
> > > lxc-checkpoint: criu.c: exec_criu: 305 lxc.console configured on source
> > > host but not target
> > >
> > >
> > > lxc-checkpoint 20160609165308.689 INFO lxc_conf -
> > > conf.c:run_script_argv:367 - Executing script
> > > '/usr/share/lxcfs/lxc.reboot.hook' for container 'test-container', config
> > > section 'lxc'
> > > lxc-checkpoint 20160609165309.206 ERROR lxc_cgfsng -
> > > cgfsng.c:recursive_destroy:983 - Error destroying
> > > /sys/fs/cgroup/systemd//lxc/test-container
> > > lxc-checkpoint 20160609165309.208 ERROR lxc_cgfsng -
> > > cgfsng.c:recursive_destroy:983 - Error destroying
> > > /sys/fs/cgroup/blkio//lxc/test-container
> > > lxc-checkpoint 20160609165309.209 ERROR lxc_cgfsng -
> > > cgfsng.c:recursive_destroy:983 - Error destroying
> > > /sys/fs/cgroup/freezer//lxc/test-container
> > > lxc-checkpoint 20160609165309.211 ERROR lxc_cgfsng -
> > > cgfsng.c:recursive_destroy:983 - Error destroying
> > > /sys/fs/cgroup/debug//lxc/test-container
> > > lxc-checkpoint 20160609165309.212 ERROR lxc_cgfsng -
> > > cgfsng.c:recursive_destroy:983 - Error destroying
> > > /sys/fs/cgroup/cpu//lxc/test-container
> > > lxc-checkpoint 20160609165309.213 ERROR lxc_cgfsng -
> > > cgfsng.c:recursive_destroy:983 - Error destroying
> > > /sys/fs/cgroup/devices//lxc/test-container
> > > lxc-checkpoint 20160609165309.214 ERROR lxc_cgfsng -
> > > cgfsng.c:recursive_destroy:983 - Error destroying
> > > /sys/fs/cgroup/perf_event//lxc/test-container
> > > lxc-checkpoint 20160609165309.215 ERROR lxc_cgfsng -
> > > cgfsng.c:recursive_destroy:983 - Error destroying
> > > /sys/fs/cgroup/cpuset//lxc/test-container
> > > lxc-checkpoint 20160609165309.217 ERROR lxc_cgfsng -
> > > cgfsng.c:recursive_destroy:983 - Error destroying
> > > /sys/fs/cgroup/net_cls//lxc/test-container
> > > lxc-checkpoint 20160609165309.220 ERROR lxc_criu -
> > > criu.c:__criu_restore:953 - restore process died
> > >
> > >
> > >
> > ----------------------------------------------------------------------------------------------------
> > >
> > > The log without --ext-mount-map
> > >
> > > /usr/local/sbin/criu restore --tcp-established --file-locks --link-remap
> > > --manage-cgroups --ext-mount-map auto --enable-external-sharing
> > > --enable-external-masters --enable-fs hugetlbfs --enable-fs tracefs -D
> > > /home/pi/checkpoint -o /home/pi/checkpoint/restore.log --root
> > > /usr/lib/arm-linux-gnueabihf/lxc --restore-detached --restore-sibling
> > > --pidfile /tmp/filet0XGku --cgroup-root /lxc/test-container console:
> > > --veth-pair eth0=vethINVTTV at lxcbr0
> > >
> > > root at pi-desktop:/home/pi/checkpoint# cat restore.log
> > > Warn (cr-restore.c:812): Set CLONE_PARENT | CLONE_NEWPID but it might
> > > cause restore problem,because not all kernels support such clone flags
> > > combinations!
> > > RTNETLINK answers: File exists
> > > RTNETLINK answers: File exists
> > > RTNETLINK answers: File exists
> > > RTNETLINK answers: File exists
> > > 1: Warn (autofs.c:77): Failed to find pipe_ino option (old kernel?)
> > > 1: Error (mount.c:3381): mnt: New root and old root are the same
> > > Error (cr-restore.c:988): 5521 killed by signal 9: Killed
> > > Error (cr-restore.c:1867): Restoring FAILED.
> > >
> > >
> > ----------------------------------------------------------------------------------------------------
> > >
> > > As a normal user, with sudo :
> > >
> > > pi at pi-desktop:~/checkpoint$ cat debug_restore
> > > lxc-checkpoint 20160609171247.434 WARN lxc_confile -
> > > confile.c:config_pivotdir:1879 - lxc.pivotdir is ignored. It will soon
> > > become an error.
> > > lxc-checkpoint 20160609171247.435 WARN lxc_confile -
> > > confile.c:config_personality:1117 - unsupported personality 'armhf'
> > > lxc-checkpoint 20160609171247.454 INFO lxc_lsm -
> > lsm/lsm.c:lsm_init:48
> > > - LSM security driver nop
> > > lxc-checkpoint 20160609171247.455 DEBUG lxc_start -
> > > start.c:setup_signal_fd:289 - sigchild handler set
> > > lxc-checkpoint 20160609171247.455 INFO lxc_start -
> > > start.c:lxc_init:488 - 'test-container' is initialized
> > > lxc-checkpoint 20160609171247.455 INFO lxc_cgroup -
> > > cgroup.c:cgroup_init:68 - cgroup driver cgroupfs-ng initing for
> > > test-container
> > > lxc-checkpoint 20160609171247.456 ERROR lxc_cgfsng -
> > > cgfsng.c:cgfsng_create:1072 - No such file or directory - Failed to
> > create
> > > /sys/fs/cgroup/systemd//lxc/test-container: No such file or directory
> > > lxc-checkpoint 20160609171247.466 INFO lxc_criu -
> > criu.c:exec_criu:387
> > > - execing: /usr/local/sbin/criu restore --tcp-established --file-locks
> > > --link-remap --manage-cgroups --ext-mount-map auto
> > > --enable-external-sharing --enable-external-masters --enable-fs hugetlbfs
> > > --enable-fs tracefs -D /home/pi/checkpoint -o
> > > /home/pi/checkpoint/restore.log --root /usr/lib/arm-linux-gnueabihf/lxc
> > > --restore-detached --restore-sibling --pidfile /tmp/file8x1eFF
> > > --cgroup-root /lxc/test-container-1 --ext-mount-map console: --veth-pair
> > > eth0=veth6AHNY2 at lxcbr0
> > > lxc-checkpoint 20160609171248.456 ERROR lxc_criu -
> > > criu.c:do_restore:705 - criu process exited 1, output:
> > >
> > >
> > > lxc-checkpoint 20160609171248.458 INFO lxc_conf -
> > > conf.c:run_script_argv:367 - Executing script
> > > '/usr/share/lxcfs/lxc.reboot.hook' for container 'test-container', config
> > > section 'lxc'
> > > lxc-checkpoint 20160609171248.984 ERROR lxc_criu -
> > > criu.c:__criu_restore:953 - restore process died
> > >
> > > ----------------------------------
> > >
> > > The restore.log as a normal user, with sudo :
> > >
> > > pi at pi-desktop:~/checkpoint$ sudo cat restore.log
> > > Warn (cr-restore.c:812): Set CLONE_PARENT | CLONE_NEWPID but it might
> > > cause restore problem,because not all kernels support such clone flags
> > > combinations!
> > > RTNETLINK answers: File exists
> > > RTNETLINK answers: File exists
> > > RTNETLINK answers: File exists
> > > RTNETLINK answers: File exists
> > > 1: Warn (autofs.c:77): Failed to find pipe_ino option (old kernel?)
> > > 1: Warn (sk-unix.c:1292): sk unix: Can't unlink stale socket 0x88b4
> > > peer 0 (name /run/systemd/notify dir -)
> > > 1: Warn (sk-unix.c:1292): sk unix: Can't unlink stale socket 0x88b6
> > > peer 0 (name /run/systemd/private dir -)
> > > 1: Warn (sk-unix.c:1292): sk unix: Can't unlink stale socket 0x88ba
> > > peer 0 (name /run/systemd/journal/dev-log dir -)
> > > 1: Warn (sk-unix.c:1292): sk unix: Can't unlink stale socket 0x8285
> > > peer 0 (name /run/systemd/journal/stdout dir -)
> > > 1: Warn (sk-unix.c:1292): sk unix: Can't unlink stale socket 0x8287
> > > peer 0 (name /run/systemd/journal/socket dir -)
> > > 1: Warn (sk-unix.c:1292): sk unix: Can't unlink stale socket 0x88d0
> > > peer 0 (name /run/systemd/journal/syslog dir -)
> > > 1: Warn (sk-unix.c:1292): sk unix: Can't unlink stale socket 0x83cc
> > > peer 0x83cb (name /run/systemd/journal/stdout dir -)
> > > 1: Warn (sk-unix.c:1292): sk unix: Can't unlink stale socket 0x83fc
> > > peer 0x8dfa (name /run/systemd/journal/stdout dir -)
> > > pie: 1: Error (pie/restorer.c:888): Can't restore ticks/time for timer>
> > > pie: 1: fd - 0
> > > pie: 1: Error (pie/restorer.c:1408): Can't restore timerfd -22
> > > pie: 1: Error (pie/restorer.c:1506): Restorer fail 1
> > > Error (cr-restore.c:985): 6401 exited, status=1
> > > Error (cr-restore.c:1867): Restoring FAILED.
> > >
> > >
> > > -------------------------------
> > >
> > > Here is the config of the container : /var/lib/lxc/test-container/config
> > >
> > > # Template used to create this container:
> > > /usr/share/lxc/templates/lxc-ubuntu
> > > # Parameters passed to the template:
> > > # For additional config options, please look at lxc.container.conf(5)
> > >
> > > # Uncomment the following line to support nesting containers:
> > > #lxc.include = /usr/share/lxc/config/nesting.conf
> > > # (Be aware this has security implications)
> > >
> > >
> > > # Common configuration
> > > lxc.include = /usr/share/lxc/config/ubuntu.common.conf
> > >
> > > # Container specific configuration
> > > lxc.rootfs = /var/lib/lxc/test-container/rootfs
> > > lxc.rootfs.backend = dir
> > > lxc.utsname = test-container
> > > lxc.arch = armhf
> > >
> > > # Network configuration
> > > lxc.network.type = veth
> > > lxc.network.link = lxcbr0
> > > lxc.network.flags = up
> > > lxc.network.hwaddr = 00:16:3e:d5:62:a5
> > > lxc.seccomp =
> > > lxc.console = none
> > > lxc.tty = 0
> > > lxc.cgroup.devices.deny = c 5:1 rwm
> >
> > > _______________________________________________
> > > CRIU mailing list
> > > CRIU at openvz.org
> > > https://lists.openvz.org/mailman/listinfo/criu
> >
> >
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