[CRIU] Any one tried use criu dump Maya?

[Jun Gan]

Hi Adrian,

Thanks a lot for your suggestion. I just tried xterm and I got exactly same
error when I dumped&restored maya.

So what Linux distribution you're using? I'm using CentOS 7.8 with stock
kernel 3.10.0, and of cause gnome desktop environment.

I launched xterm using exactly same command and vnc script.

# setsid unshare -i ./vnc_server.sh xterm
# ps axf
 16314 ?        Ss     0:00 /bin/bash ./vnc_server.sh xterm
 16320 ?        Sl     0:00  \_ Xvnc :25 -v -geometry 800x600 -interface
0.0.0.0 -SecurityTypes none
 16353 ?        S      0:00  \_ xterm
 16355 pts/4    Ss+    0:00      \_ bash

*Form lsof and ss, I also saw it connects to "@/tmp/.ICE-unix/15119" and
it's "gnome-session-b" on the other end.*

# lsof -p 16353
COMMAND   PID USER   FD   TYPE             DEVICE  SIZE/OFF      NODE NAME
..............
xterm   16353 root    3u  unix 0xffff972c81d0ee80       0t0    155258 socket
*xterm   16353 root    4u  unix 0xffff972c81d0f700       0t0    155259
socket*
xterm   16353 root    5u   CHR                5,2       0t0     12415
/dev/ptmx

# ss --unix -a -p
*u_str  ESTAB      0      0      @/tmp/.ICE-unix/15119  41542
  * 155259                users:(("gnome-session-b",pid=15119,fd=19))*


I have to use "--external unix[155259]" when dump and "--ext-unix-sk" when
restore to make CRIU happy. But got ICE error right after CRIU said it was
successfully restored:

# ./criu restore -D xterm/ -o restore.log -v4 --shell-job --ext-unix-sk

ICE error:  Offending minor opcode    = 0 ()
            Offending sequence number = 1
            Error class               = BadState
            Severity                  = FatalToConnection

I feel like it's pretty standard for a graphic application running on gnome
desktop environment? Is there any way for CRIU to dump&restore it?

Really appreciate if anyone can help!

Thanks,
Jun Gan


On Fri, May 22, 2020 at 5:36 AM Adrian Reber <adrian at lisas.de> wrote:

> I just tried it with xterm in the VNC session and it works for me. Can
> you try with a simple application like xterm before trying maya.
>
>                 Adrian
>
> On Fri, May 22, 2020 at 02:28:50AM -0700, Jun Gan wrote:
> > Hello,
> >
> > I'm trying to dump Maya by following this tutorial: https://criu.org/VNC
> >
> > Somehow use newns.c doesn't work so I manually do it in the command line:
> >
> > # cat vnc_server.sh
> > #!/bin/bash
> > set -m
> > Xvnc :25 -v -geometry 800x600 -interface 0.0.0.0 -SecurityTypes none &
> > pid=$!
> > trap "kill $pid; wait" EXIT
> > sleep 3
> > DISPLAY=:25 $@
> >
> > #setsid unshare -i ./vnc_server.sh maya
> >
> > # ps axf
> >  849901 ?        Ss     0:00 /bin/bash ./vnc_server.sh maya
> >  849902 ?        Sl     0:00  \_ Xvnc :25 -v -geometry 800x600 -interface
> > 0.0.0.0 -SecurityTypes none
> >  849921 ?        S      0:00  \_ /bin/bash -f /usr/local/bin/maya
> >  849935 ?        Sl     0:12      \_ /usr/autodesk/maya2020/bin/maya.bin
> >  849940 ?        Sl     0:00          \_
> >
> /opt/Autodesk/AdskLicensing/9.2.1.2399/AdskLicensingAgent/AdskLicensingAgent
> > -i 94306fdc-e6a3-4f3e-7035-03617ab75c25
> >
> > # ./criu dump -t 849901 -D test/ -o dump.log -v4 -j --tcp-established
> > --external unix[2432303888] --external unix[2432544010]
> >
> > Those two unix stream socket are:
> > 1) seems maya use gnome-session-b
> > u_str  ESTAB      0      0      @/tmp/.ICE-unix/404075 -1862464845
> >   * -1862663408           users:(("gnome-session-b",pid=404075,fd=18))
> >
> > 2) seems maya licensing agent using dbus.
> > u_str  ESTAB      0      0      @/tmp/dbus-eVrtb5pHUv -1862436068
> > * -1862423286           users:(("dbus-daemon",pid=404085,fd=26))
> >
> > I have no much knowledge about them so I just add "external unix" to
> avoid
> > error, managed to dump it successfully.
> >
> > Then restore:
> >
> > # ./criu restore -D test -o restore.log -v4 --tcp-established -d
> > --shell-job --ext-unix-sk
> >
> >
> > ICE error:  Offending minor opcode    = 0 ()
> >
> >             Offending sequence number = 1
> >
> >             Error class               = BadState
> >
> >             Severity                  = FatalToConnection
> >
> >
> > In the restore.log, I saw it was restored successfully, but I got above
> > error immediately, and of cause Maya exits right after that.
> >
> >
> > I didn't some research about "gnome-session" and "ice", but no idea why
> > Maya uses those, and how I can avoid this problem.
> >
> > Really appreciate it if anyone can help!
> >
> > Thanks a lot!!!
> >
> > --
> > Jun Gan
>
> > _______________________________________________
> > CRIU mailing list
> > CRIU at openvz.org
> > https://lists.openvz.org/mailman/listinfo/criu
>


-- 
Jun Gan
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