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

[Oscar Fernández]

Sorry, I forgot to attach the criu_pre_dump.log:

Error (files.c:424): can't fstatfs file: Bad file descriptor
Error /cr-dump.c:1356): Pre-dumping files failed (pid: 1390)
Error (cr-dump.c:1687): Pre-dumping FAILED.

Thanks!


2014-03-27 17:47 GMT+01:00 Oscar Fernández <oscarfernandz at gmail.com>:

> 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
>
> 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
>
>


-- 
Óscar Fernández
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