[CRIU] crtools error checkpoint/restore error ("Unable to open pstree.img")

[Kevin Wilson]

Hello,
First of all, FYI, my tests up till now were performed with crtools
0.4; but from now on I will try with the latest git tree.

1)
> Am I right, you tried to checkpoint an sshd, which served your connection?
Yes. This indeed gave error in **checkpoint**. Then after reboot, I
tried directly on the machine itself, and this time
it worked. It could be that checpointing over sshd connection should
work and this is considered a BUG. I will try to understand it more
deeply.

2) adding -x for restore did not help. I have the same problem still
and the same error as restore gave before (the error I posted)

3)
> BTW, have you applied two patches I've recently sent? If no, please do.
I cloned the git tree about an  hour ago, and "git log" showed
dump: Missing \n in pr_err message, from two hours ago, which means
that the two last patches were not in the tree yet. I see now that
they are in the tree. Should I try  restore with -x with the new
patches ?

Best,
Kevin

On Tue, Mar 26, 2013 at 8:10 PM, Pavel Emelyanov <xemul at parallels.com> wrote:
> On 03/26/2013 10:07 PM, Kevin Wilson wrote:
>> Hi,
>> Good news: checkpoint of sshd now works!
>>
>> What I did is, after reboot, try the **same** checkpoint
>> command. And no error was mentioned, also dump.log
>> did not show errors.
>> The difference was that I issued the command from the
>> terminal itself. In previous experiments, I issued the command
>> from a different machine, from which I was connected by "ssh"
>> to the machine on which I ran crtools checkpoint. It could be
>> that even so this should have worked; I will try also with other processes.
>
> Am I right, you tried to checkpoint an sshd, which served your connection?
> Or you had two connections? One for running program and the other one for
> running crtools?
>
> BTW, have you applied two patches I've recently sent? If no, please do.
>
>> Restore does not work (I try it from the same terminal).
>> I get this error:
>>
>> 00.004341)    803: Error (sk-unix.c:833): FATAL: Peer 0x3c10 unresolved for 0x3
>> c0f
>> (00.022538) Error (cr-restore.c:902): 803 exited, status=255
>> (00.022648) Error (cr-restore.c:1209): Someone can't be restored
>
> This is external unix socket again. Use the -x option on restore as well.
>
>> Best,
>> Kevin
>
> Thanks,
> Pavel