Re: remoted migration KVM-guest failed

[Anthony Liguori <anthony-rdkfGonbjUSkNkDKm+mE6A@public.gmane.org>]

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Zhang, Jingke wrote:
> Hi Anthony,
>     My KVM-version is:  
> Kernel:    b41e5014dd8712e8de2b656617f7a7a158cd992a
> Userspace: 86e8eba8f8349d2e02e3b0ae0ce7c1993f4352fb
>     This is the latest commit which is built at 2007-07-24 by us. And there is no any extra patch. We can do remote migration successfully before, but failed this time. I am sure that machine A and B can ping each other successfully.
>     BTW, the method of migrate "exec://dd of=foo.img" is to save the KVM-guest, and we restore it. I guess the live migration for KVM is different from that.  
>   

It's almost exactly the same code path. If you can reproduce with an
"exec://" URL, then that gives us an easy way to reproduce and we can
examine the traffic by hand to see what went wrong. If you cannot
reproduce with an exec:// URL, it suggests that the bug your seeing is
part of the tcp:// URI handling code (and there's not a lot of that).

Regards,

Anthony Liguori

>     Thank you.
>
>
>
>
> -----Original Message-----
> From: Anthony Liguori [mailto:anthony-rdkfGonbjUSkNkDKm+mE6A@public.gmane.org] 
> Sent: 2007Äê7ÔÂ25ÈÕ 11:20
> To: Zhang, Jingke
> Cc: kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
> Subject: Re: [kvm-devel] remoted migration KVM-guest failed
>
> Zhang, Jingke wrote:
>   
>> Hi all,
>>
>> I test the migration in KVM-ia32e (using two machines to do remote 
>> migration), but it failed.
>>
>> But if I do it in the local host, it can pass. Does anyone meet the 
>> same issue? Please give me some help, thank you very much!
>>
>> The command I used on the destination (machine B) point is:
>>
>> qemu-system-x86_64 . -m 512 -net 
>> nic,macaddr=00:16:3e:3a:2d:56,model=rtl8139 -net 
>> tap,script=/etc/kvm/qemu-ifup -hda /root/hvm/ia32e_fc6.img ¨Cincoming 
>> tcp://0:4444
>>
>> The command I used on the source (machine A) point is:
>>
>> qemu-system-x86_64 . -m 512 -net 
>> nic,macaddr=00:16:3e:3a:2d:56,model=rtl8139 -net 
>> tap,script=/etc/kvm/qemu-ifup -hda /root/hvm/ia32e_fc6.img and (qemu) 
>> migrate ¨Cd tcp://192.168.199.69:4444
>>
>> Then the (machine B) shows errors:
>>
>> Migrate_incoming_fd failed (rc=233)
>>
>> Migration failed rc=233
>>
>>     
>
> Curious, it indicates that the migration stream is corrupted. Can you do 
> something like:
>
> On machine A:
>
> (qemu) migrate "exec://dd of=foo.img"
>
> And then on machine B:
>
> cat foo.img | qemu-system-x86_64 . -m 512 -net 
> nic,macaddr=00:16:3e:3a:2d:56,model=rtl8139 -net 
> tap,script=/etc/kvm/qemu-ifup -hda /root/hvm/ia32e_fc6.img ¨Cincoming stdio
>
> What version of KVM is this? Are there any patches applied?
>
> Regards,
>
> Anthony Liguori
>
>   
>> BTW, dmesg on machine B shows:
>>
>> ====================
>>
>> sw0: port 2(tap0) entering disabled state
>>
>> device tap0 left promiscuous mode
>>
>> sw0: port 2(tap0) entering disabled state
>>
>> ====================
>>
>> Thank you, Zhangjingke
>>
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>>   
>>     
>
>   



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