[CRIU] p.haul: mtouch test "Pre-dump failed"

[Oscar Fernández]

Hello Andrew, thanks for your answer.

I'm using the latest version of CRIU ( https://github.com/xemul/criu ).

Find attached the logs you ask for.

Thanks for your help.


2014-03-28 9:41 GMT+01:00 Andrew Vagin <avagin at parallels.com>:

> On Thu, Mar 27, 2014 at 05:47:32PM +0100, Oscar Fernández wrote:
> > Hello and congratulations for your great work.
> >
> > I'm interested in p.haul and I wanted to see how it works. I found the
> mtouch
> > test as a process live migration example (
> https://github.com/xemul/p.haul/blob
> > /master/test/mtouch/HOWTO ), I follow all the steps but I get an error
> when
> > executing the command
> >
> > # ./p.haul pid $test_pid $destination_node_ip
>
> Which version of CRIU do you use?
>
> Could you provide more info?
>
> $ lsof -p $test_pid > mem-touch.lsof
> $ strace -fo criu.predump.log ./criu pre-dump -v4 -o pd.log -D tmp -t 945
>
> and send  criu.predump.log, mem-touch.lsof, tmp/pd.log to us.
>
> Thanks.
>
> >
> > at the source node.
> >
> > I'm trying to do the migration between two Ubuntu server 13.10 VMs,
> should I
> > try with other distro?
> >
> > The output at the SRC node is:
> >
> > Connecting to target host
> > Initialized shared FS hauler
> > Connecting to CRIU service
> > Preliminary FS migration
> > Starting iterations
> > * Iteration 0
> > making directory /var/local/p.haul-fs/14.03.27-15.35-bvrTFM/img/1
> > Issuing pre-dump command to service
> > Traceback (most recent call last):
> >   File "p.haul/p.haul", line 39, in <module>
> >     worker.start_migration()
> >   File "/home/test/p.haul/p_haul_iters.py", line 100, in start_migration
> >     raise Exception("Pre-dump failed")
> > Exception: Pre-dump failed
> >
> > The output at the DST node is:
> >
> > Connected
> > Selecting htype to ('pid', '1403')
> > Making directory /var/local/p.haul-fs/14.03.27-15.35-lI4_j3/img/1
> > Starting page server for iter 1
> > Sending criu rpc req
> > Page server started at 1613
> > Disconnected
> > Stopping page server 1613
> >
> > The criu service log file at SRC node is:
> >
> > (00.017306) The service socket is bound to /var/run/criu_service.socket
> > (00.018764) Waiting for connection...
> > (3032.36109 Connected.
> > (3032.36131 Waiting for connection...
> > (3032.37836 Restrict C/R with 0:0 uid
> > (3032.39072 Worker(pid 1505) exited with 1
> >
> > The criu service log file at DST node is:
> >
> > (00.012570) The service socket is bound to /var/run/criu_service.socket
> > (00.014230) Waiting for connection...
> > (2995.80278 Connected.
> > (2995.80293 Waiting for connection...
> > (2995.80455 Restrict C/R with 0:0 uid
> > (2995.80500 Worker(pid 1556) exited with 0
> >
> > I checked the source code and found that in p_haul_iters.py line 99, the
> value
> > of resp.success is False, so an Exception is raised. I tried to find the
> reason
> > of that failure without success. I'm running all comands in test as root
> and
> > the NFS has all permissions to everybody (777).
> >
> > Any idea of what can be the reason? What distro did you use to make the
> test
> > work?
> >
> > Thank you
> >
> > --
> > Óscar Fernández
> >
>
> > _______________________________________________
> > CRIU mailing list
> > CRIU at openvz.org
> > https://lists.openvz.org/mailman/listinfo/criu
>
>


-- 
Óscar Fernández
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