Hi Thomas,
Why don't you re-test DRBD 8.4.2 using Wheezy (Linux 3.2.0-4-amd64 #1 SMP
Debian 3.2.41-2 x86_64 GNU/Linux) ? If the error show again, that could be the
answer that the problem is fixed in 8.4.3.
Regards
Louis
>________________________________
> From: Thomas Thrainer <[email protected]>
>To: Louis <[email protected]>
>Cc: Luca Fornasari <[email protected]>; DRBD
><[email protected]>
>Sent: Friday, May 3, 2013 2:14 PM
>Subject: Re: [DRBD-user] Enabling two primaries break connection
>
>
>
>Hi,
>
>
>I just re-tested using Wheezy (Linux 3.2.0-4-amd64 #1 SMP Debian 3.2.41-2
>x86_64 GNU/Linux) and DRBD 8.4.3.
>I couldn't reproduce the original bug (having one side writing, and toggling
>the other side between secondary/primary). However, if I try to write on the
>"toggling" side to the disk when in primary mode, I could still produce
>ProtocolError's.
>As that's (fortunately) not required by Ganeti, we'll can probably ignore this
>(although I will test some more of our use-cases with DRBD 8.4.3).
>
>
>Can somebody confirm that the original behavior was a bug in DRBD 8.4.2 which
>was fixed in DRBD 8.4.3? Or could interactions with the kernel be the problem?
>
>
>Thanks,
>Thomas
>
>
>
>On Fri, May 3, 2013 at 2:56 PM, Louis <[email protected]> wrote:
>
>
>>
>>
>>
>>Linux intel1 3.5.0-23-generic #35~precise1-Ubuntu SMP
>>
>>
>>
>>
>>
>>>________________________________
>>> From: Luca Fornasari <[email protected]>
>>>To: DRBD <[email protected]>
>>>Sent: Friday, May 3, 2013 1:01 PM
>>>
>>>Subject: Re: [DRBD-user] Enabling two primaries break connection
>>>
>>>
>>>
>>>Hi Louis,
>>>
>>>
>>>What kernel are yuo running?
>>>
>>>
>>>Cheers,
>>>Luca
>>>
>>>
>>>
>>>On Fri, May 3, 2013 at 1:41 PM, Louis <[email protected]>
>>>wrote:
>>>
>>>Hi Thomas,
>>>>
>>>>
>>>>I just tested your scenario on DRBD 8.4.3. It seems fine, connection did
>>>>not break.
>>>>While doing the DD, I did change primary / secondary on bob node few times,
>>>>but the connection never break.
>>>>
>>>>
>>>>The only thing I couldn't run this drbdadm --allow-two-primaries=yes
>>>><resource>, it give uknown command. But I do have allow-two-primaries setup
>>>>in my drbd.conf, not sure that make any different?
>>>>
>>>>
>>>>Regards
>>>>Louis
>>>>
>>>>
>>>>>________________________________
>>>>> From: Thomas Thrainer <[email protected]>
>>>>>To: Luca Fornasari <[email protected]>
>>>>>Cc: [email protected]
>>>>>Sent: Friday, May 3, 2013 10:00 AM
>>>>>Subject: Re: [DRBD-user] Enabling two primaries break connection
>>>>>
>>>>>
>>>>>
>>>>>Hi,
>>>>>
>>>>>
>>>>>Given the fact that I could reproduce the bug regularly, I'm pretty sure
>>>>>that this is indeed a DRBD bug. Unfortunately I didn't find a bugtracker
>>>>>on the DRBD site. Is there one? If not, what's the official way to report
>>>>>bugs?
>>>>>
>>>>>
>>>>>For the record, here are the steps to reproduce:
>>>>> * create a device with primary on alice and secondary on bob
>>>>> * on alice: while true; do dd if=/dev/zero of=/dev/drbd0; done
>>>>> * on bob: drbdadm --allow-two-primaries=yes <resource>; drbdadm primary
>>>>><resource>
>>>>> * you might have to drbdadm secondary <resource> on bob and then repeat
>>>>>the previous step in order to produce the bug
>>>>>
>>>>>
>>>>>Log files are as mentioned in the first mail of the thread.
>>>>>
>>>>>
>>>>>Cheers,
>>>>>Thomas
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>On Tue, Apr 30, 2013 at 2:25 PM, Thomas Thrainer <[email protected]>
>>>>>wrote:
>>>>>
>>>>>Hi Luca,
>>>>>>
>>>>>>
>>>>>>I just reproduced the exact same problem using only drbdadm. I also
>>>>>>inspected the output of the -d option, and drbdadm does the exact same
>>>>>>thing as Ganeti in this regard.
>>>>>>
>>>>>>
>>>>>>Thanks,
>>>>>>Thomas
>>>>>>
>>>>>>
>>>>>>
>>>>>>On Tue, Apr 30, 2013 at 2:18 PM, Thomas Thrainer <[email protected]>
>>>>>>wrote:
>>>>>>
>>>>>>Hi Luca,
>>>>>>>
>>>>>>>
>>>>>>>I'll try the drbdadm method this as soon as I get to it. Right now I
>>>>>>>have no machines around which are already configured via drbdadm.
>>>>>>>
>>>>>>>
>>>>>>>Note that I have included both logs (secondary and primary) in my first
>>>>>>>email.
>>>>>>>
>>>>>>>
>>>>>>>I use DRBD 8.4.2 because 8.4.3 didn't compile against my kernel (3.2.27)
>>>>>>>and I didn't want to put much work into it. I this bug is known and
>>>>>>>fixed in 8.4.3, I'll might look into compiling against 3.2.27 again.
>>>>>>>
>>>>>>>
>>>>>>>Cheers,
>>>>>>>Thomas
>>>>>>>
>>>>>>>--
>>>>>>>
>>>>>>>Thomas Thrainer | Software Engineer | [email protected] |
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>Google Germany GmbH
>>>>>>>Dienerstr. 12
>>>>>>>80331 München
>>>>>>>
>>>>>>>Registergericht und -nummer: Hamburg, HRB 86891
>>>>>>>Sitz der Gesellschaft: Hamburg
>>>>>>>Geschäftsführer: Graham Law, Katherine Stephens
>>>>>>
>>>>>>
>>>>>>
>>>>>>--
>>>>>>
>>>>>>Thomas Thrainer | Software Engineer | [email protected] |
>>>>>>
>>>>>>
>>>>>>
>>>>>>Google Germany GmbH
>>>>>>Dienerstr. 12
>>>>>>80331 München
>>>>>>
>>>>>>Registergericht und -nummer: Hamburg, HRB 86891
>>>>>>Sitz der Gesellschaft: Hamburg
>>>>>>Geschäftsführer: Graham Law, Katherine Stephens
>>>>>
>>>>>
>>>>>
>>>>>--
>>>>>
>>>>>Thomas Thrainer | Software Engineer | [email protected] |
>>>>>
>>>>>
>>>>>
>>>>>Google Germany GmbH
>>>>>Dienerstr. 12
>>>>>80331 München
>>>>>
>>>>>Registergericht und -nummer: Hamburg, HRB 86891
>>>>>Sitz der Gesellschaft: Hamburg
>>>>>Geschäftsführer: Graham Law, Katherine Stephens
>>>>>
>>>>>_______________________________________________
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>>>>>
>>>>>
>>>>>
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>>>>
>>>
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>>>
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>>
>
>
>
>--
>
>Thomas Thrainer | Software Engineer | [email protected] |
>
>
>
>Google Germany GmbH
>Dienerstr. 12
>80331 München
>
>Registergericht und -nummer: Hamburg, HRB 86891
>Sitz der Gesellschaft: Hamburg
>Geschäftsführer: Graham Law, Katherine Stephens
>
>
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