[CRIU] Checkpointing failed

[Tycho Andersen]

On Tue, Oct 07, 2014 at 04:53:50PM +0100, Thouraya TH wrote:
> i have done:
> # This derives from the global common config
> lxc.include = /usr/share/lxc/config/common.conf
> 
> # Default mount entries
> lxc.mount.entry = proc proc proc nodev,noexec,nosuid 0 0
> lxc.mount.entry = sysfs sys sysfs defaults 0 0
> #lxc.mount.entry = /sys/fs/fuse/connections sys/fs/fuse/connections none
> bind,optional 0 0
> #lxc.mount.entry = /sys/kernel/debug sys/kernel/debug none bind,optional 0 0
> #lxc.mount.entry = /sys/kernel/security sys/kernel/security none
> bind,optional 0 0
> #lxc.mount.entry = /sys/fs/pstore sys/fs/pstore none bind,optional 0 0
> #lxc.mount.entry = tmpfs /sys/fs/pstore none bind,optional 0 0
> 
> dump.log
> Warn  (fsnotify.c:183): fsnotify:     Handle 800001:60a0d cannot be opened
> Warn  (fsnotify.c:183): fsnotify:     Handle 800001:6511a cannot be opened
> Error (files-reg.c:455): Can't link remap to /proc/38/mountinfo: No such
> file or directory

Which version of criu are you using? I think you'll need the
development version to fix this.

Tycho

> Error (cr-dump.c:1603): Dump files (pid: 2473) failed with -1
> Error (cr-dump.c:1953): Dumping FAILED.
> 
> 2014-10-07 16:41 GMT+01:00 Andrey Vagin <avagin at parallels.com>:
> 
> > On Tue, Oct 07, 2014 at 04:32:34PM +0100, Thouraya TH wrote:
> > > what i have done exactly:
> > >
> > > root at thouraya-Lenovo-3000-N500:~# vim
> > /usr/share/lxc/config/ubuntu.common.conf
> > >
> > > # This derives from the global common config
> > > lxc.include = /usr/share/lxc/config/common.conf
> > >
> > > # Default mount entries
> > > lxc.mount.entry = proc proc proc nodev,noexec,nosuid 0 0
> > > lxc.mount.entry = sysfs sys sysfs defaults 0 0
> > > lxc.mount.entry = /sys/fs/fuse/connections sys/fs/fuse/connections none
> > > bind,optional 0 0
> > > lxc.mount.entry = /sys/kernel/debug sys/kernel/debug none bind,optional
> > 0 0
> > > lxc.mount.entry = /sys/kernel/security sys/kernel/security none
> > bind,optional 0
> > > 0
> > > #lxc.mount.entry = /sys/fs/pstore sys/fs/pstore none bind,optional 0 0
> > > lxc.mount.entry = tmpfs /sys/fs/pstore none bind,optional 0 0
> >
> > Could you comment out all lines here except proc and sysfs?
> >
> > >
> > > ...
> > >
> > > root at thouraya-Lenovo-3000-N500:~# lxc-checkpoint -s -D
> > /home/thouraya/lxcCR -n
> > > u1
> > > Checkpointing u1 failed.
> > >
> > > dump.log:
> > > Warn  (fsnotify.c:183): fsnotify:     Handle 800001:60a0d cannot be
> > opened
> > > Warn  (fsnotify.c:183): fsnotify:     Handle 800001:6511a cannot be
> > opened
> > > Error (parasite-syscall.c:387): si_code=4 si_pid=2886 si_status=5
> > > Error (parasite-syscall.c:387): si_code=4 si_pid=2887 si_status=5
> > > Error (parasite-syscall.c:387): si_code=4 si_pid=2888 si_status=5
> > > Error (mount.c:448): 75:./sys/fs/pstore doesn't have a proper root mount
> > > Error (cr-dump.c:1953): Dumping FAILED.
> > >
> > >
> > >  i have to mount pstore ?
> > > > As you know i have already done this:
> > > >
> > > > root at u1:/# sudo umount /sys/fs/pstore
> > > > root at u1:/# vim /etc/fstab
> > > > root at u1:/# vim /etc/fstab
> > > >
> > > > i have only this line in the file:
> > > > -- > # UNCONFIGURED FSTAB FOR BASE SYSTEM
> > > >
> > > > root at u1:/# rmdir /sys/fs/pstore
> > > > rmdir: échec de suppression de «/sys/fs/pstore»: Permission non
> > accordée
> > > > root at u1:/# sudo rmdir /sys/fs/pstore
> > > > rmdir: échec de suppression de «/sys/fs/pstore»: Permission non
> > accordée
> > > > root at u1:/# sudo su
> > > > root at u1:/#  rmdir /sys/fs/pstore
> > > > rmdir: échec de suppression de «/sys/fs/pstore»: Permission non
> > accordée
> > > > root at u1:/#
> > >
> > > Bests.
> > >
> > >
> > > 2014-10-07 16:17 GMT+01:00 Thouraya TH <thouraya87 at gmail.com>:
> > >
> > >     i'm sorry, i will try not in the container :(
> > >
> > >     2014-10-07 16:15 GMT+01:00 Thouraya TH <thouraya87 at gmail.com>:
> > >
> > >         Inside the container:
> > >         root at u1:/# sudo umount  /sys/fs/fuse/connections
> > >         root at u1:/#
> > >
> > >         root at u1:/# cd /usr/share/lxc/config/
> > >         bash: cd: /usr/share/lxc/config/: Aucun fichier ou dossier de ce
> > type
> > >         root at u1:/# cat /usr/share/lxc/config/ubuntu.common.conf
> > >         cat: /usr/share/lxc/config/ubuntu.common.conf: Aucun fichier ou
> > dossier
> > >         de ce type
> > >
> > >         ?
> > >
> > >         2014-10-07 15:49 GMT+01:00 Serge Hallyn <serge.hallyn at ubuntu.com
> > >:
> > >
> > >             Quoting Thouraya TH (thouraya87 at gmail.com):
> > >             > root at u1:/# sudo umount /sys/fs/fuse/
> > >             > umount : /sys/fs/fuse/ : n'est pas monté
> > >             >
> > >             > !!
> > >             > it doesn't work
> > >             >
> > >             > As you know i have already done this:
> > >             >
> > >             > root at u1:/# sudo umount /sys/fs/pstore
> > >             > root at u1:/# vim /etc/fstab
> > >             > root at u1:/# vim /etc/fstab
> > >             >
> > >             > i have only this line in the file:
> > >             > -- > # UNCONFIGURED FSTAB FOR BASE SYSTEM
> > >             >
> > >             > root at u1:/# rmdir /sys/fs/pstore
> > >             > rmdir: échec de suppression de «/sys/fs/pstore»:
> > Permission non
> > >             accordée
> > >             > root at u1:/# sudo rmdir /sys/fs/pstore
> > >             > rmdir: échec de suppression de «/sys/fs/pstore»:
> > Permission non
> > >             accordée
> > >             > root at u1:/# sudo su
> > >             > root at u1:/#  rmdir /sys/fs/pstore
> > >             > rmdir: échec de suppression de «/sys/fs/pstore»:
> > Permission non
> > >             accordée
> > >             > root at u1:/#
> > >
> > >             Ok I don't know whether you're having a problem with pstore
> > at c/r
> > >             or
> > >             not as that seems unrelated to the fuse gorp, but if you are
> > having
> > >             a
> > >             problem with pstore, then
> > >
> > >             Edit /usr/share/lxc/config/ubuntu.common.conf, comment out
> > >
> > >             lxc.mount.entry = /sys/fs/pstore sys/fs/pstore none
> > bind,optional 0
> > >             0
> > >
> > >             and add
> > >
> > >             lxc.mount.entry = tmpfs /sys/fs/pstore none bind,optional 0 0
> > >
> > >             That should keep mountall from trying to mount pstore.
> > >
> > >             I think what you really want to do is teach criu to simply
> > mark
> > >             that pstore
> > >             was mounted, then simply bind-mount it from the host again at
> > >             restart.
> > >
> > >
> > >
> > >
> > >
> > >
> >