[CRIU] CRIU LXC error
Andrew Vagin
avagin at parallels.com
Fri Feb 14 06:29:40 PST 2014
On Fri, Feb 14, 2014 at 11:25:14AM +0545, Urgen Sherpa wrote:
> Hellow Andrew ,
> i removed this line --CONFIG_DEVPTS_MULTIPLE_INSTANCES=y from file /etc/boot/
> config-3.11.0-12-generic.when i run criudump at first thiserror is
I have not asked to do this. I have asked to delete the
"lxc.cgroup.devices.allow = c 5:1 rwm" line from the config file.
Then you need to restart CT and try to dump it again.
Thanks.
> showed.root at ktmnp:/home/nplink/criu-1.1# cat /dumps/dumps.log
> Error (sk-netlink.c:77): The socket has data to read
> Error (cr-dump.c:1493): Dump files (pid: 1877) failed with -1
> Error (cr-dump.c:1828): Dumping FAILED.
> On second run :-
> root at ktmnp:/home/nplink/criu-1.1# ./criu dump -t 1654 -D /dumps/ -o dumps.log
> root at ktmnp:/home/nplink/criu-1.1# cat /dumps/dumps.log
> Error (parasite-syscall.c:387): si_code=4 si_pid=1930 si_status=5
> Error (parasite-syscall.c:387): si_code=4 si_pid=1931 si_status=5
> Error (parasite-syscall.c:387): si_code=4 si_pid=1932 si_status=5
> Error (tty.c:203): tty: Can't obtain ptmx index: Inappropriate ioctl for device
> Error (cr-dump.c:1493): Dump files (pid: 2074) failed with -1
> Error (cr-dump.c:1828): Dumping FAILED.
>
> Do i have to compile the kernel and set the CONFIG_DEVPTS_MULTIPLE_INSTANCES=n
> or is there any other way?
> thank you
>
>
> On Wed, Feb 12, 2014 at 1:34 PM, Andrew Vagin <avagin at parallels.com> wrote:
>
> On Wed, Feb 12, 2014 at 11:26:25AM +0545, Urgen Sherpa wrote:
> > hi,
> > the output of reading mountinfo is as follows
> > root at ktmnp:/home/nplink# lxc-info -n test-container
> > state: RUNNING
> > pid: 4953
> > root at ktmnp:/home/nplink# cat /proc/4953/mountinfo
> > 131 72 252:0 /var/lib/lxc/test-container/rootfs / rw,relatime - ext4 /dev
> /
> > mapper/ktmnp--vg-root rw,errors=remount-ro,data=ordered
> > 132 131 0:65 / /proc rw,nosuid,nodev,noexec,relatime - proc proc rw
> > 133 131 0:66 / /sys rw,relatime - sysfs sysfs rw
> > 134 133 0:17 / /sys/fs/fuse/connections rw,relatime - fusectl none rw
> > 135 133 0:6 / /sys/kernel/debug rw,relatime - debugfs none rw
> > 136 133 0:10 / /sys/kernel/security rw,relatime - securityfs none rw
> > 137 133 0:22 / /sys/fs/pstore rw,relatime - pstore none rw
> > 73 131 0:67 / /dev/pts rw,relatime - devpts devpts rw,gid=5,mode=
> 620,ptmxmode=
> > 666
> > 74 131 0:67 /ptmx /dev/ptmx rw,relatime - devpts devpts rw,gid=5,mode=
> > 620,ptmxmode=666
> > 75 133 0:68 / /sys/fs/cgroup rw,relatime - tmpfs none rw,size=4k,mode=755
> > 76 131 0:69 / /run rw,nosuid,noexec,relatime - tmpfs none rw,size=
> 49484k,mode=
> > 755
> > 77 76 0:70 / /run/lock rw,nosuid,nodev,noexec,relatime - tmpfs none
> rw,size=
> > 5120k
> > 78 76 0:71 / /run/shm rw,nosuid,nodev,relatime - tmpfs none rw
> > 79 76 0:72 / /run/user rw,nosuid,nodev,noexec,relatime - tmpfs none
> rw,size=
> > 102400k,mode=755
> >
> > with reference to https://help.ubuntu.com/lts/serverguide/lxc.html#
> > lxc-installation I stopped and started container with with this..
> >
> > #lxc-start -n test-container -f /var/lib/lxc/test-container/config
> > heres what /var/lib/lxc/test-container/config looks like.
> > #cat config
> >
> > lxc.console = none
> > lxc.network.type = veth
> > lxc.network.hwaddr = 00:16:3e:b3:f5:95
> > lxc.network.flags = up
> > lxc.network.link = lxcbr0
> > lxc.rootfs = /var/lib/lxc/test-container/rootfs
> > lxc.mount = /var/lib/lxc/test-container/fstab
> > lxc.pivotdir = lxc_putold
> > lxc.devttydir = lxc
> > lxc.tty = 0
> > lxc.pts = 1024
> > lxc.utsname = test-containerq
> > lxc.arch = amd64
> > lxc.cap.drop = sys_module mac_admin mac_override sys_time
> > lxc.cgroup.memory.limit_in_bytes = 1994M
> >
> > lxc.cgroup.devices.deny = a
> > lxc.cgroup.devices.allow = c *:* m
> > lxc.cgroup.devices.allow = b *:* m
> > lxc.cgroup.devices.allow = c 1:3 rwm
> > lxc.cgroup.devices.allow = c 1:5 rwm
> > lxc.cgroup.devices.allow = c 5:1 rwm
>
> This line allows to use /dev/console. Could you try to remove it and dump
> CT?
>
> > lxc.cgroup.devices.allow = c 5:0 rwm
> > lxc.cgroup.devices.allow = c 1:9 rwm
> > lxc.cgroup.devices.allow = c 1:8 rwm
> > lxc.cgroup.devices.allow = c 136:* rwm
> > lxc.cgroup.devices.allow = c 5:2 rwm
> > lxc.cgroup.devices.allow = c 254:0 rm
> > lxc.cgroup.devices.allow = c 10:229 rwm
> > lxc.cgroup.devices.allow = c 10:200 rwm
> > lxc.cgroup.devices.allow = c 1:7 rwm
> > lxc.cgroup.devices.allow = c 10:228 rwm
> > lxc.cgroup.devices.allow = c 10:232 rwm
> >
> >
> > Below is my kernel config
> >
> > #vim /boot/config-3.11.0-12-generic
> > ...
> > ,,,,
> > ...
> > # Character devices
> > #
> > CONFIG_TTY=y
> > CONFIG_VT=y
> > CONFIG_CONSOLE_TRANSLATIONS=y
> > CONFIG_VT_CONSOLE=y
> > CONFIG_VT_CONSOLE_SLEEP=y
> > CONFIG_HW_CONSOLE=y
> > CONFIG_VT_HW_CONSOLE_BINDING=y
> > CONFIG_UNIX98_PTYS=y
> > CONFIG_DEVPTS_MULTIPLE_INSTANCES=y
> > CONFIG_LEGACY_PTYS=y
> > CONFIG_LEGACY_PTY_COUNT=0
> > CONFIG_SERIAL_NONSTANDARD=y
> > CONFIG_ROCKETPORT=m
> > CONFIG_CYCLADES=m
> > ....
> > ...
> >
> > Thankyou gentlemen
> >
> >
> >
> > On Tue, Feb 11, 2014 at 7:02 PM, Andrew Vagin <avagin at parallels.com>
> wrote:
> >
> > On Tue, Feb 11, 2014 at 04:47:34PM +0400, Cyrill Gorcunov wrote:
> > > On Tue, Feb 11, 2014 at 04:26:09PM +0400, Cyrill Gorcunov wrote:
> > > > On Tue, Feb 11, 2014 at 05:32:46PM +0545, Urgen Sherpa wrote:
> > > > > /usr/lib/locale/C.UTF-8/LC_CTYPE (path inode=2883985)
> > > > > getty 2700 root 0u CHR 5,1 0t0 937203 /dev/
> console
> > > > > getty 2700 root 1u CHR 5,1 0t0 937203 /dev/
> console
> > > > > getty 2700 root 2u CHR 5,1 0t0 937203 /dev/
> console
> > > >
> > > > Aha! So we're trying to dump /dev/console. I guess it's VT
> terminal,
> > > > which has no "fetch index" operation. Need to think how to
> resolve it,
> > > > thanks for report!
> > >
> > > Urgen, are you sure that you've set lxc.console = none and lxc.tty
> = 0 ?
> > > The presense of /dev/console here with getty over it makes me thing
> > > that lcx either not read your config, or you need to restart lcx
> > container
> > > probably.
> >
> > Probaly this CT uses devtmpfs, which isn't virtualized.
> >
> > # cat /proc/pid/mountinfo
> >
> > Which processes in CT have opened /dev/console?
> >
> > >
> > > Also, do you have
> > >
> > > CONFIG_DEVPTS_MULTIPLE_INSTANCES=y
> > >
> > > in your kernel config?
> > >
> > > Cyrill
> >
> >
>
>
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